Pressure bomb method

Strauss, W A., and Edse, R., Burning Velocity Measurements by the Constant Pressure Bomb Method, 7 th Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, 1958, pp. 377-385. 

Power. The pressure bomb method gave ca 110%TNT(Ref 14, p 132), while the Trauzl testjFr modif,gave a value(called CUP)equal to 2%PA(Ref 16). Blatt(Ref 22) gives Trauzl test value 98% TNT... 

Sizing of filtration equipment is impossible from a theoretical approach because of the vaiying nature of the solid particles. Almost all applications are determined with the aid of test work. Typical test arrangements are a vacuum leaf test, a buchner funnel, and a pressure bomb method. 

Bomb Method the sample is burned in a bomb under oxygen pressures of 30 bar. The sulfur contained in the wash water is analyzed via gravimetry as barium sulfate. 

The transesterification of sucrose has been performed with a fatty acid ester of a volatile alcohol in the presence of an alkaline catalyst in a dipolar, aprotic solvent.142 The reaction of sucrose (293 mmoles) with methyl dodecanoate (293 mmoles) in A/,N-dimethylformamide in the presence of sodium methoxide in a pressure bomb for 8 h at 130° gave, after solvent extraction and crystallization, sucrose mono(dodecanoate) (m.p. 72-80° [a]D+52°) in 50% yield.142 Commercialization of these sucrose esters has so far been limited, in part because of the use of expensive solvents, and, in part, because solvent remaining in the product makes it unsuitable for use as a food emulsifier. In view of this situation, methods have been developed in which the use of toxic and expensive solvents has been avoided. 

High Pressure PVT Properties. The earlier volumetric methods (113,114) consisted of a piezometer, similar to the one shown in Figure 6, which is contained in a pressure bomb. The... 

The bomb method is quite similar to the bubble method except that the constant volume condition causes a variation in pressure. One must, therefore, follow the pressure simultaneously with the flame front. 

Burning, Laminar, of Gases. Influence of pressure and temperature on the laminar burning velocity of stoichiometric acetylene-air mixtures using a constant-volume bomb method is described by M.L. Agrawal S.P. Sharma in UnivRoorkeeResJ(India), 8(3-4), Part 11, 81-102(1965) (in Engl)... 

Constant-Pressure Bomb and method for measuring burning velocities is described by W.A. Strauss R. Edse, in 7thSympCombstn (1959), 377-85... 

It can be seen from the above that it is desirable, wherever possible, to dissolve the oxides directly in mixed acids. Small quantities of residue can be fused and added, as described for the analysis of steel. Dissolution in pressure bombs [12, 57] is a method used to keep the salt concentration within limits. This technique is usable for single determinations in particular cases (small quantities) it has not been extensively applied in routine analysis up to now because the use of larger quantities is impossible or too dangerous. 

The total quantity of sulfur in a gear oil due to the base oil and the additives present can be determined by a bomb method (ASTM D-129, IP 61) in which the sulfur is assessed gravimetrically as barium sulfate. The copper strip test (ASTM D-130, ASTM D-849, ASTM D-2649, IP 154) is used to simulate the tendency of the oil to attack copper, brass, or bronze. Because active sulfur is desirable for some extreme-pressure applications, a positive copper strip result can indicate that the formulation is satisfactory, but care is necessary in the interpretation of copper strip results because formulations of different chemical compositions may give different results and yet have similar performance in the intended application. Corrosion preventative properties are also measurable (ASTM D-4636). 

The earliest synthesis1 of H2-tpyp and later modifications8,9 involve a 48-hour reaction time, and the use of glass pressure bombs, which can explode. A quicker and safer method uses the Adler10 condensation conditions as described by Longo," with a simplified work-up method. 

J. T. Agnew, and L. B. Graiff, The Pressure Dependence of Laminar Burning Velocity by the Spherical Bomb Method, Combustion and Flame, 5 209-219 (1961). 

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