packed bed reactor design gas phase catalytic reaction

... selection of reactor: solid packed bed, liquid phase stirred tank, or fluidized bed. 2.2 DIRECTION OF THE REACTION PROGRESS AND CHEMICAL EQUILIBRIUM 2.2.1 DIRECTION OF REACTION PROGRESS ... chemical reactions. There are various reactor types depending on phases like gas, liquid and solid with respect to reactants and products, or on catalytic and non -catalytic types. We classify reactors ... HCCO+O=HCO+CO CHEMICAL REACTIONS AND DESIGN OF CHEMICAL REACTORS 5 (a) Tubular reactor, plug flow (b) Tank reactor, mixed flow. The basic concepts of these reactors are shown in Figure...

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Ngày tải lên: 01/04/2014, 10:37

... possibility for H/D exchange between hydrogen in the gas phase and the solvent (e.g. reaction 9.1) if or is used. Miscellaneous catalytic reactions in aqueous media 277 57. 58. 59. 60. 61. 62. 63. 64. 65. R. ... L-menthol by Takasago [42] 265 Miscellaneous catalytic reactions in aqueous media 273 Hydrocyanation of olefins and dienes is an extremely important reaction [32] (about 75 % of the world’s adiponitrile ... complexes of TPPTS described the Ni-catalyzed hydration of butadiene and 3-pentenenitrile (Scheme 9.10). The aqueous phase with the catalyst could be recycled, however the reaction was found not...

Ngày tải lên: 23/12/2013, 07:19

... important catalytic residues in RNase T1 are Glu58 and His92, each of which functions as an acid and a base at different steps of the reaction [4,5]. An important role in catalysis was also ascribed ... involved in the catalytic reaction are conserved in both enzymes [32]. In spite of this, the kinetic and enzymatic properties of the two enzymes differ [25,33,34]; for example, the catalytic constant ... their equiv- alents in RNase Sa have shown that they are necessary for the catalytic reaction. At the pH optimum for the reaction, both arginines are protonated, facilitating polarization of the...

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... easily created. Technique of phase- coded modulation in this work is binary phase shift keying (BPSK) with the phase “0” of the IF sine wave represented for bit “1” and phase “π” represented for ... Therefore, our working focuses on design radar system components using modern electronic devices and techniques. In radar transmitter, Barker code generator, phase- coded modulator, and local ... advantage of microcontroller. High power amplifier is designed with an impedance matching using microstrip technique. In receiver, we designed and fabricated successfully a very high sensitive...

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Ngày tải lên: 24/03/2014, 01:20

... recognized as a substrate by the enzyme. The catalytic reaction mechanism From the results of the X-ray structural study, we deduced the catalytic reaction mechanism of P. stutzeri l-RhI, as shown ... catalytic metal ion was identified by the high-resolution X-ray structure of Strepto- myces olivochromogenes d-XI, showing that the dis- placement of metal ions was involved in the catalytic reaction ... O Mn O H Mn O O OH OH OH OH H O – – Mn1 Mn2 Mn1 Mn2 Mn1 Mn2 Mn1 Mn2 Mn1 Mn2 Mn1 Mn2 Trp179 Asp291 Asp327 Asp291 Asp327 Asp291 Asp327 Asp291 Asp291 Asp327 Trp179 Asp327 Asp327 AD-form AD-form BC-formBC-form – – – – – – – – Asp291 AD-form AD-form AB C DE F Fig. 7. The proposed catalytic reaction mechanism of P. stutzeri L-RhI. The catalytic water molecule (W4) is highlighted by a red ellipsoid. Yellow...

Ngày tải lên: 29/03/2014, 08:20

... different design levels of conversion on the sizes of the reactor and the condenser. A 90% conversion design produces a 1.68-m 3 reactor Figure 2.25 Matlab program for autorefrigerated reactor. 2.7 ... Isothermal CSTRs in Series with Reaction A ! B The first multiple -reactor system we study is the reaction considered in Section 2.1, which is the irreversible reaction A ! B. The design equation for the ... length of the reactor for its detection. 4. Feed temperature is a very important design parameter in tubular reactors. A low feed temperature results in low reaction rates. So a long reactor is...

Ngày tải lên: 01/04/2014, 10:24

... autocatalytic behavior. GAS- SOLID CATALYTIC REACTIONS Consider a gaseous reactant flowing through a bed of solid catalyst pellets. The physical steps involved are the transfer of the component Reaction ... to Reactor Design Fundamentals for Ideal Systems 260 Introduction 260 A General Approach 262 Ideal Isothermal Reactors 264 Numerical Methods for Reactor Systems Design 279 Reversible Series Reactions ... a wide range from various viewpoints. Chemical reactions occur in various phases such as the gas phase, in solution using various solvents, at gas- solid, and other interfaces in the liquid and...

Ngày tải lên: 01/04/2014, 10:25

... the gas phase and the reactions of nitric oxide with chlorine and oxygen: (2NO + Cl 2 -* 2NOC1; 2NO + O 2 -» 2NO 2 ). 4.1 Reaction Mechanisms 85 be the same as that for the forward reaction. Second, ... laboratory investigation a high-pres- sure gas reaction A ^ 2B is being studied in a flow reactor at 200 °C and 10.13 MPa. At the end of the reactor the gases are in chemical equilib- rium, and ... forms one encounters in the laboratory. They include the gas phase reaction of molecular hydrogen and iodine (H 2 -f I 2 -• 2HI), the reactions of free radicals with mole- cules (e.g., H + Br 2 ...

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