FERMENTATION USING nPARAFFINS Single Cell Protein SCP
The term single cell protein is used to represent a group of microbial cells such as algae and yeast that have high protein content. The production of these cells is not generally considered a synthetic process but microbial farming via fermentation in which n-paraffins serve as the substrate. Substantial research efforts were invested in the past two decades to grow algae, fungi, and yeast on different substrates such as n-paraffins, methane, methanol, and even carbon dioxide. The product SCP...
Sulfur
Sulfur is a reactive, nonmetallic element naturally found in nature in a free or combined state. Large deposits of elemental sulfur are found in various parts of the world, with some of the largest being along the coastal plains of Louisiana. In its combined form, sulfur is naturally present in sulfide ores of metals such as iron, zinc, copper, and lead. It is also a constituent of natural gas and refinery gas streams in the form of hydrogen sulfide. Different processes have been developed for...
Hot plate
A hot plate is an essential piece of equipment if you are going to be working on high carbon tools, such as D2 punches and dies, because it is very important to keep these tools above their pre-heat temperature at all times during welding. There will be many ways of making hot plates, gas or electric or you may prefer to buy one ready made. I have always used home made hot plates heated by a hand-held propane torch as shown in Fig. 7.10. Propane heating torch heats hot plate and fire bricks...
523 The Kynch theory of sedimentation
The behaviour of concentrated suspensions during sedimentation has been analysed by Kynch1-46-1, largely using considerations of continuity. The basic assumptions which are made are as follows a Particle concentration is uniform across any horizontal layer, b Wall effects can be ignored, c There is no differential settling of particles as a result of differences in shape, size, or composition, d The velocity of fall of particles depends only on the local concentration of particles, e The...
Allowable Buckling Stress In Cylindrical Shells [1420
A metal cross-sectional area, in.2 B ASME Code allowable stress, psi C end connection coefficient, use 1.0 for simply supported and 2.0 for cantilevered Cc. max allowable slenderness ration per AWYVA D-100 D OD of cylinder, in. E modulus of elasticity, psi e tolerance for peaking, in. FS factor of safety Fv minimum specified yield strength, psi F , allowable longitudinal compressive stress, psi 1 moment in inertia, in.4 Lc length at which critical stress is achieved, in. 1 tolerance for...
29Exercises
2.1. Find the number of carbon 162C atoms in 1 cm3 of graphite, density 1.65 g cm3. 2.2. Estimate the radius and volume of the gold atom, using the metal density of 19.3 g cm3 and atomic weight close to 197. Assume that atoms are located at corners of cubes and that the atomic radius is that of a sphere with volume equal to that of a cube. 2.3. Calculate the most probable speed of a neutron gas at temperature 20 C 293K , noting that the mass of a neutron is 1.67 x 10-27 kg. 2.4. Prove that the...
Resistance and propulsion
3.1 Resistance and propulsion concepts 3.1.1 Interaction between ship and propeller Any propulsion system interacts with the ship hull. The flow field is changed by the usually upstream located hull. The propulsion system changes, in turn, the flow field at the ship hull. However, traditionally naval architects have considered propeller and ship separately and introduced special efficiencies and factors to account for the effects of interaction. While this decomposition is seen by many as an...
18G Gauje and R Morbioli High Temperature Protective Coatings SS Singhal Ed The
19. R.S. Parzuchowski, U.S. Patent 4,132,816, 1979 Principles of Pack Diffusion Coating Aluminizing. Pack diffusion coating may be considered as a CVD process carried out with the aid of a powder mixture pack , in or near which the part to be coated substrate is immersed or suspended, containing the element or elements to be deposited source , a halide salt activator , and an inert diluent such as alumina filler . When the mixture is heated, the activator reacts to produce an atmosphere of...
35314 Viscous Fluid Dampers
Damping devices based on the operating principle of high-velocity fluid flow through orifices have found numerous applications in shock and vibration isolation of aerospace and defense systems. In the past decade, research and development of viscous fluid dampers for seismic applications to civil engineering structures have been performed to accomplish three major objectives. The first was to demonstrate by analysis and experiment that viscous fluid dampers can improve seismic capacity of a...
7iacs And Solas Requirements
To reduce the risk of failure in older ships, IACS introduced new Unified Requirements to reduce the risk of progressive flooding in existing bulk carriers. To prevent progressive flooding due to sea water in No. 1 Hold, the corrugated transverse bulkhead between the first two cargo holds, and the double bottom in way of the first cargo hold had to comply with new strength requirements assuming that No. 1 cargo hold was flooded. A damage stability review had to be performed with No. 1 Hold...
easy to feed
Figure 21.15 Examples of parts climbing or shingling. From Boothroyd, Assembly Automation and Product Design, Marcel Dekker, NY, 1992. We have not yet reached a point where we need a decision process for automate or conventional build, comparable to make or buy, but it is coming. Meanwhile, whenever the designer encounters a part or an assembly whose repetitive requirements to make or assemble exceeds 200,000 project plan quantity times items per end product , he or she should immediately...
62 Concrete and masonry elements
When reinforced concrete or masonry elements are present in a building, the steelwork designer can profit by using these stiff elements to resist lateral loads. A typical example is a building with a reinforced concrete lift shaft, to which the steelwork can be attached. Similarly, masonry walls forming in-fill panels between steel columns can replace bracing members by providing in-plane stiffness. The ideal position for a shear wall is on the line of the lateral loads, to avoid eccentric...
The Furnace Black Process
This is a more advanced partial combustion process. The feed is first preheated and then combusted in the reactor with a limited amount of air. The hot gases containing carbon particles from the reactor are quenched with a water spray and then further cooled by heat exchange with the air used for the partial combustion. The type of black produced depends on the feed type and the furnace temperature. The average particle diameter of the blacks from the oil furnace process ranges between 200-500...
32 Laminar flow in circular tubes
Consider the laminar, steady, incompressible fully-developed flow of a time-independent fluid in a circular tube of radius, R, as shown in Figure 3.1. Since there is no angular velocity, the force balance on a fluid element situated at distance r, can be written as p nr2 - p Ap nr2 trz 2nrL 3.1 Figure 3.1 Flow through a horizontal pipe Figure 3.1 Flow through a horizontal pipe This shows the familiar linear shear stress distribution across the pipe cross-section, the shear stress being zero at...
222 Multilayer or 3D Weaving
The first major difference between conventional weaving and multilayer weaving is the requirement to have multiple layers of warp yarns. The greater the number of layers required and thus the thickness of the preform or the wider the fabric produced, means a larger number of individual warp yarns that have to be fed into the loom and controlled during the lifting sequence. Therefore the source of the warp yarn for multilayer weaving is generally from large creels in which each warp yarn comes...
Damped Unbalance Response
Unfortunately, particularly for the vendors, the undamped analysis opened somewhat of a Pandora's box. While the calculated frequencies were not quite accurate, they were better than any previous analysis, once the actual bearing parameters were input. It should be mentioned in the course of the rotor analysis development, the art of tilting pad design moved from just carrying a load at speed to one of tailoring the arc of the pad by a design method called preload to achieve the stiffness and...
Fluidizedbed agitation
As described above, the Oslo-Krystal unit is a fluidized-bed agitated crystal-lizer in which the gentle action minimizes secondary nucleation and allows large crystals to grow. Oslo-Krystal vacuum crystallizers can be of the 'open' Figure 8.51 or 'closed' Figure 8.45 types. In the former the crystallization zone is at atmospheric pressure. In the latter all parts of the equipment are under reduced pressure. Figure 8.50. Escher-Wyss Tsukishima double propeller DP crystallizer Figure 8.50....
Rotary Mechanical Pump
Figure 2-12. Schematic of vacuum deposition system. high 10 10 torr vacuum deposition and surface analytical equipment, but are being supplanted by turbomolecular and cryopumps. The broad variety of applications requiring a low-pressure environment is reflected in a corresponding diversity of vacuum system design. One such system shown in Fig. 2-12 is employed for vacuum evaporation of metals. The basic pumping system consists of a nominal 15-cm diameter, multistage oil-diffusion pump backed by...
13 Why Soil Mechanics
Soil mechanics has become a distinct and separate branch of engineering mechanics because soils have a number of special properties, which distinguish the material from other materials. Its development has also been stimulated, of course, by the wide range of applications of soil engineering in civil engineering, as all structures require a sound foundation and should transfer its loads to the soil. The most important special properties of soils will be described briefly in this chapter. In...
Doxford Jtype
Doxford J-type engines were built in long and short stroke versions in bore sizes of 580, 670 and 760 mm, and with three to nine cylinders delivering up to around 20 000 kW Table 14.1 . The engine is a single-acting two-stroke opposed-piston type with each cylinder having two pistons which move in opposite directions from a central combustion chamber. The pistons in each cylinder are connected to a three-throw section of the crankshaft, the lower piston being coupled to the centre throw by a...
47 References
1. Darcy, H. P. G. Les Fontaines publiques de la ville de Dijon. Exposition et application suivre et des formules a employer dans les questions de distribution d'eau Victor Dalamont, 1856 . 2. Eisenklam, P. Chapter 9 Porous Masses in Cremer, H. W. and Davies, T. Chemical Engineering Practice, Vol. 2 Butterworths, 1956 . 3. Brinkman, H. C. Appl. Scient. Res. 1A 1948 81-86. On the permeability of media consisting of closely packed porous particles. 4. Dupuit, A. J. E. J. Etudes theoriques et...
1174 Service and Field Practice
Like the above laboratory-based tests, in-service and field tests are designed to evaluate a range of material degradation processes including erosion-corrosion, stress corrosion, and conventional corrosion processes. In addition information is required concerning material performance within a wide range of operating environments, including atmospheric, sea and fresh waters, high-temperature, in vivo, soils and concrete. In this respect only a brief survey of the relevant test methods can be...
Heat Transfer With Change Of Phase 521
FIG. 5-9 Chart for determining film coefficient hm for film-type condensation of pure vapor, based on Eqs. 5-88 and 5-93. For vertical tubes multiply hm by 1.2. If 4r pf exceeds 2100, use is in U.S. customary units to convert feet to meters, multiply by 0.3048 to convert inches to centimeters, multiply by 2.54 and to convert British thermal units per hour-square foot-degrees Fahrenheit to watts per square meter-kelvins, multiply by 5.6780. FIG. 5-9 Chart for determining film coefficient hm for...
Covalent Enantiomeric Derivatization of Some Important Functional Groups
Derivatization of amines The reagents suitable for the chiral derivatization of amines can be categorized as follows Activated carboxylic acids These are usually car-boxylic chlorides and the reaction with primary and secondary amines leads to diastereomeric carbox-amides. The classical reagent R chloride is still in use for the preparation of gas chromatographically separable diastereomers. Some others 'dual-purpose' reagents with strong UV absorption or fluorescence include 1-...
The Soldering Process Can Be Easily Automated Offering The Possibility Of
Mass soldering by wave, drag, or dip machines has been the preferred method for making high-quality, reliable connections for many decades. Despite the appearance of new connecting systems, it still retains this position. Correctly controlled, soldering is one of the least expensive methods for fabricating electrical connections. Incorrectly controlled, it can be one of the most costly processes--not because of the initial cost, but because of the many far-reaching effects of poor workmanship....
Recycling H2SO4 and DimethylIsopropylamine from an Acid Scrubber
Alkaline or acid scrubbers are often used to remove components that are harmful to the environment, such as NOx, SO2 or certain amines from waste air streams. In these processes large amounts of acids or bases are consumed and salts are produced. In general, only dilute acids and bases are required in scrubbers. This makes the use of electrodialytic water dissociation with bipolar membranes a very suitable process to recover the acids or bases from the corresponding salts. The recovery of base...
168 Further Reading
Backhurst, J. R. and Harker, J. H. Process Plant Design Heinmann, London, 1973 . Backhurst, J. R., Harker, J. H., and Porter, J. E. Problems in Heat and Mass Transfer Edward Arnold, London, 1974 . Bailey, A. G. Electrostatic Spraying of Liquids John Wiley, New York, 1988 . Barclay, S. F. A Study of Drying Inst. Energy, London, 1957 . Bridgman, M. J. Drying Principles and Practice in the Process Industries Caxton, Christchurch, 1966 . Brown, W. H. An Introduction to the Seasoning of Timber...
Picture Of Curved Operating Lines Mccabe-thiele
Figure 31. McCabe-Thiele analysis of equilibrium stages for the ethanol-water system. Figure 31. McCabe-Thiele analysis of equilibrium stages for the ethanol-water system. the slope of this line may be determined The operating line for the top of the column see Figure 31 is then y 0.56 x 1 - 0.56 0.7 0.56x 0.308 The describing equation for the operating line at the bottom of the column is V L D z -xB q xD - xB - xD - z V 1.25 0.2 - 0.05 1.2 0.7 - 0.05 - 0.7 - 0.2 2.07 The operating line for the...
Nomograph for calculating Reynolds number for compressible flow friction factor
Figure 1. Reynolds number for compressible flow friction factor for clean steel and wrought iron pipe. Figure 1. Reynolds number for compressible flow friction factor for clean steel and wrought iron pipe. The nomograph Figure 1 permits calculation of the Reynolds number for compressible flow and the corresponding friction factor. It is based on the equation Figure 2. Equivalent volume and weight flow rates of compressible fluids. Figure 2. Equivalent volume and weight flow rates of...
Nomograph for calculating Reynolds number for flow of liquids and friction
The nomograph Figure 1 permits calculation of the Re 22 700 qr 50 6 Qr 6 31-W dvr Reynolds number for liquids and the corresponding friction dm dm dm m a factor for dean ed and wrought iron pipe. where Re Reynolds number The Reynolds number is defined as d inside pipe diameter, in. Figure 1. Reynolds number for liquid flow friction factor for clean steel and wrought iron pipe Reproduced by permission, Tech. Paper, 410, Crane Co., copyright 1957 . Figure 1. Reynolds number for liquid flow...
Simular Reaction Calorimeter
Many chemical reactions in the CPI are performed in a semi-batch process under isothermal conditions. The DIERS methodology in sizing the relief system for runaway reactions is based on adiabatic conditions using the batch process. There are instances where a semi-batch process under isothermal condition is advantageous in significantly reducing the vent size or even possibly eliminating runaway reaction and the need for pressure relief. Singh 20 performed studies involving the esterification...
Surface Condenser
FIGURE 35 Typical hookup for submergence controlled condensate pump FIGURE 35 Typical hookup for submergence controlled condensate pump 0 20 40 6 0 80 100 FIGURE 36 Characteristic of a condensate pump operating on a submergence-controlled system 0 20 40 6 0 80 100 FIGURE 36 Characteristic of a condensate pump operating on a submergence-controlled system ate a shock wave of a high enough intensity to inflict physical damage on the pump parts. If, however, higher values of NPSH were required as...
maa Apparent Matrix Density jisft 130 120 110 100 90 80 70 60 50 40 30
Figure 5-100. Chart for finding apparent matrix density or apparent matrix transit time from bulk density or interval transit time and apparent total porosity 199 . 3 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2 Pmaa. Apparent Matrix Density g cc Figure 5-100. Chart for finding apparent matrix density or apparent matrix transit time from bulk density or interval transit time and apparent total porosity 199 . its propagation velocity is reduced. The wave then refracts to the borehole where it is...
1641 Diffusion theory of drying
In the general form of the curve for the rate of drying of a solid shown in Figure 16.2, there are two and sometimes three distinct sections. During the constant-rate period, moisture vaporises into the air stream and the controlling factor is the transfer coefficient for diffusion across the gas film. It is important to understand how the moisture moves to the drying surface during the falling-rate period, and two models have been used to describe the physical nature of this process, the...
Selected References Ubp
S. Abkowitz, Isostatic Pressing of Complex Shapes from Titanium and Titanium Alloys, Production to Near Net Shape Source Book, American Society for Metals, 1983 C.B. Boyer, J.H. Peterson, and F.D. Orcutt, Equipment for Hydrostatic Pressing of Metal Powders, Proc. National Conference on Fluid Power, Vol XXV, 27th Annual Meeting Chicago , Fluid Power Society and National Fluid Power Association, 19-21 Oct 1971 C.B. Boyer and J.C. Wahl, Equipment for Cold Isostatic Pressing, No. 74-PVP-21, Conf....
Design hints
An improvement in the hydrodynamic performance must be demonstrated to justify the application of Kort nozzles. In a seaway the efficiency of a propeller with nozzle is less reduced than for a non-ducted propeller due to the more axial inflow. The nozzle efficiency increases in a seaway due to the increased thrust-loading coefficient. In total, the nozzle thus decreases the efficiency losses. When considering if it is worthwhile to install a nozzle, nozzle construction and initial costs play a...
A141 Rigid plastic flow rule inversion
Rearranging the first of equations A1.29 gives In principle, this can be used directly to determine the deviatoric stress field from a given strain increment field. However, the right-hand side is non-linear in the strain increments as both s and de depend on them. Practical rigid plastic finite element methods Section A1.5 seek actual strain increment fields from initial guesses, by iteration. For efficiency of operation, they use a linearized form of equation A1.33 , to calculate variations...
122 Applications of 3D Braided Composites
The braiding process is familiar to many fields of engineering as standard 2D braided carbon and glass fabric have been used for many years in a variety of high technology items, such as golf clubs, aircraft propellers and yacht masts Popper, 1991 . 3D braided preform has a number of important advantages over many types of 2D fabric preforms and prepreg tapes, including high levels of conformability, drapability, torsional stability and structural integrity. Furthermore, 3D braiding processes...
Layer Growth
In this technique the crystals grow as a layer fixed and perpendicular to a cooled wall. The heat of crystallization is removed through the crystal layer and the wall. At low growth rates typically lt 10 7ms_1 and proper mixing of the mother liquor, a stable crystal morphology can be maintained, which results in a good selectivity of the crystallization step. In industrial practice, however, very high growth rates 10 6-10 5 m s_1 must be applied leading to roughening of the crystal surface...
Aiaa Paper 71-113
1 Grief. R. and Sanders. J. L The effect of a stringer on the stress in it cracked sheet. Harvard University TR 18 1963 . 2 Vlieger. H. and Broek, D Residual strength of cracked stiffened panels. Built up shed .srnicnires. AGARD Fracture Mechanics Survey 1974 . 3 Vlieger. H Residual strength of cracked stiffened panels. Eng. Fracture Mechanics. 5 1973 pp. 447-478. 4 Poe. C. C Fatigue crack propagation in stiffened panels. ASTM ST P. 1971 pp. 79 97. 5 Poe. C. C The effect of riveted and...
Testing and Control of Cleaners
Alkaline cleaners lose strength through use and dilution, as well as through the necessity of replacing lost cleaning solution with water, so a reliable method of determining cleaner concentration is necessary. The most commonly used method is acid-base titration. In this procedure, an accurately measured amount of alkaline cleaner is placed in a container, and then an acid of specific concentration is slowly added titrated to the solution with stirring until a specific pH is achieved. The...
Acknowledgements
B. Lux and B. Zeiler would like to express their gratitude to Prof. W.D. Schubert of Vienna University of Technology for helpful and constructive discussions in preparing the section Production of Tungsten and Tungsten Carbide Powders. Dr. M. Spross, Managing Director of Wolfram Bergbau- und Huetten-GmbH Nfg KG, is gratefully acknowledged for his kind and benevolent support. Mr. C. Keller's help in preparing the figures is also appreciated. The section Other Refractory Metals was adapted from...
SULFONATION OF nPARAFFINS Secondary Alkane Sulfonates SAS
Linear secondary alkane sulfonates are produced by the reaction between sulfur dioxide and n-paraffins in the range of C15-C17. R-H 2SO2 2O2 H2O r RSO3H H2SO4 The reaction is catalyzed by ultraviolet light with a wave-length between 3,300-3,600A.21 The sulfonates are nearly 100 biodegradable, soft and stable in hard water, and have good washing properties. Sodium alkanesulfonates for detergent manufacture can also be produced from the free-radical addition of sodium bisulfite and alpha olefins
Standard Contracted Weir
FIGURE 13 Standard contracted weirs and temporary bulkhead with contracted rectangular weir discharging at free flow FIGURE 13 Standard contracted weirs and temporary bulkhead with contracted rectangular weir discharging at free flow FIGURE 14 Typical suppressed weir in a flume drop FIGURE 14 Typical suppressed weir in a flume drop FIGURE 15 Standard weir, or staff, gage FIGURE 15 Standard weir, or staff, gage head H in feet meters and the crest length L in feet meters . The discharge of the...
583 Twintube McPherson struts pressurized
The development of the pressurized McPherson strut has met with significant difficulties for many years. Direct transfer of the monotube principle, as used in the shock absorber, is not possible because of the high extension force. There are solutions that keep the rod small and transfer the wheel control to the cylinder tube, but these are expensive and involve high levels of damper friction see Section 6.4.6 in Ref. 5 . The pressurized twin-tube system is a good compromise. Here, the oil is...
For chart on deflection of horizontal pipe lines see next page
When a horizontal pipeline is supported at intermediate points, sagging of the pipe occurs between these supports, the amount of sag being dependent upon the weight of the pipe, fluid, insulation, and valves or fittings which may be included in the line. If the pipeline is installed with no downward pitch, pockets will be formed in each span in which case condensation may collect if the line is transporting steam. In order to eliminate these pockets, the line must be pitched downward so that...
Nature and Forms of Corrosion
There is a natural tendency for nearly all metals to react with their environment. The result of this reaction is the creation of a corrosion product which is generally a substance of very similar chemical composition to the original mineral from which the metal was produced. atmospheric corrosion Protection against atmospheric corrosion is important during the construction of a ship, both on the building berth and in the shops. Serious rusting may occur where the relative humidity is above...
130 090 045 033 024 019
Example 6-4 A 60 , 30- by 30-cm branch takeoff leaves a 30- by 50-cm trunk duct. The size of the downstream section is also 30 by 50 cm. The upstream flow rate is 1.5 m3 s, and the branch flow rate is 0.5 m3 s. The upstream pressure is 500 Pa and the air temperature is 15 C. a What is the pressure following the straight-through section, and b what is the pressure in the branch line Vu 10 m s Vd 6.61 m s Vb 5.56 m s p 1.225 kg m3 Substituting into the revised Bernoulli equation 6-10 gives
Rl Type Engines
The RTA engine's immediate predecessor in the Sulzer low speed programme was the loop-scavenged RL series, of which examples remain in service and merit attention here. The RLA56, a small bore two-stroke engine introduced in 1977, incorporated the basic design concept of the successful RND and RNDM series but extended the power range at the lower end. This engine, of comparatively long stroke design, was the first model in the RLA series. It retained many of the design features of the then most...
121 Introduction
Structural design consists of proportioning elements of a system to satisfy various criteria of performance, safety, serviceability, and durability under various demands. The presence of uncertainty cannot be avoided in every phase of structural engineering analysis and design, but it is not simple to satisfy design requirements in the presence of uncertainty. After three decades of extensive work in different engineering disciplines, several reliability evaluation procedures of various degrees...