The behaviour of an adiabatic fixed bed reactor for the oxidation of carbon monoxide—II

1979 ◽  
Vol 34 (5) ◽  
pp. 625-634 ◽  
Author(s):  
C.S. Sharma ◽  
R. Hughes
Keyword(s):  
Carbon Monoxide ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Oxidation Of Carbon Monoxide

Effect of Minerals in Coal on the Product Yield of Coal Pyrolysis and Phenols in the Low-Temperature Tar

2012 ◽  
Vol 512-515 ◽  
pp. 1129-1136 ◽  
Author(s):  
Fan Hu Zeng ◽  
De Min He ◽  
Jun Guan ◽  
Qiu Min Zhang
Keyword(s):  
Carbon Monoxide ◽  
Low Temperature ◽  
Brown Coal ◽  
Atmospheric Pressure ◽  
Fixed Bed ◽  
Product Yield ◽  
Fixed Bed Reactor ◽  
Coal Pyrolysis ◽  
Catalytic Role

Wulagai brown coal and Wulagai acid washed brown coal were used to investigate the effect of minerals in coal on the reactivity of coal pyrolysis. The experiments were carried out at atmospheric pressure in a fixed bed reactor. The results showed that minerals in brown coal affected the product yield of coal pyrolysis and phenols in the low-temperature tar. The minerals in coal played a catalytic role on the generation of carbon monoxide and ethylene, and the decomposition of tar. At the same time, they may suppress the decomposition of intermediates or the producing of final phenols during coal pyrolysis.

scholarly journals Synthesis of methanol in microchnnel

2021 ◽  
Vol 2119 (1) ◽  
pp. 012113
Author(s):  
S V Dimov
Keyword(s):  
Experimental Data ◽  
Carbon Monoxide ◽  
Chemical Reactions ◽  
Synthesis Gas ◽  
Methanol Synthesis ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Microchannel Reactor ◽  
Flow Rates ◽  
Synthesis Of Methanol

Abstract Systematic experimental data have been obtained on the results of catalytic chemical reactions in a microchannel reactor for the synthesis of methanol from synthesis gas. Synthesis gas contains hydrogen, carbon monoxide and dioxide, as well as nitrogen in the ratio 58/29/5/8. The experiments were carried out at different flow rates in the temperature range 190-260C. Experiments were also carried out for methanol synthesis in fixed bed reactor at different synthesis pressures.

scholarly journals Reduction mechanism of titanomagnetite concentrate by carbon monoxide

2013 ◽  
Vol 49 (3) ◽  
pp. 263-270 ◽  
Author(s):  
X.F. She ◽  
H.Y. Sun ◽  
X.J. Dong ◽  
Q.G. Xue ◽  
J.S. Wang
Keyword(s):  
Carbon Monoxide ◽  
Early Stage ◽  
Fixed Bed ◽  
Reduction Rate ◽  
Fixed Bed Reactor ◽  
Reduction Degree ◽  
Interfacial Chemical Reaction ◽  
Ar Gas ◽  
Reaction Processing ◽  
Carbon Monoxide Content

Titanomagnetite concentrate was reduced by CO-Ar gas mixtures in a laboratory fixed bed reactor in the temperature range from 1123 to 1323 K. The influences of reductive conditions on the reduction rate and metallization degree including reduction temperature, reduction time and carbon monoxide content were studied. And the characteristics of reduced samples were analyzed by XRD, BES and EDS. Results shown that both the reduction and metallization degree increased with the increasing of temperature and monoxide content. The low reduction degree was owing to the low iron oxides content and high impurities content such as magnesium oxide in titanomagnetite concentrate. Above 1123 K, the reduction is controlled by interfacial chemical reaction at early stage of the reaction and then turns to the internal diffusion controlling with reaction processing. The reduction path at temperatures above 1123 K is suggested as follow: Fe3-xTixO4 ? (x+y-1)FeO + Fe4-2x-yTixO4-y ? (x+y-1)Fe + Fe4-2x-yTixO4-y ? (3-x)Fe + xTiO2 (0<y<4-2x, x=0.27?0.02)

scholarly journals Kinetic study of carbon monoxide methanation over mesoporous Ni-Mo catalyst prepared by a hydrothermal method

2019 ◽  
Vol 44 (1) ◽  
pp. 3-17 ◽  
Author(s):  
Zhang Jiaying
Keyword(s):  
Carbon Monoxide ◽  
Design Method ◽  
Orthogonal Design ◽  
Fixed Bed ◽  
Space Velocity ◽  
Fixed Bed Reactor ◽  
Weight Hourly Space Velocity ◽  
Mo Catalyst ◽  
Proposed Model ◽  
Orthogonal Design Method

The kinetics of carbon monoxide methanation over Ni-Mo-SiO2 catalyst were studied. The model was developed based on catalyst tests carried out in a fixed-bed reactor at a reaction temperature varied from 300 °C to 450 °C under a pressure from 0.1 to 1.5 MPa with a weight hourly space velocity of 60,000 mL h−1 g−1. An orthogonal design method was adopted to select test points with temperature, pressure, and feed compositions as factors. Based on the experimental observations, a Langmuir–Hinshelwood equation kinetic model was formulated and its parameters were estimated by fitting the experimental data implemented in MATLAB. The activation energy for the formation of CH4 was 45.4 kJ mol−1 and comparing the experimental and model-predicted data showed that the proposed model gives a reasonable fit with an average absolute relative deviation of ±9.8%.

Enhanced Yield of Hydrogen From Wastes Using High Temperature Steam Gasification

2005 ◽  
Vol 128 (3) ◽  
pp. 179-185 ◽  
Author(s):  
W. Jangsawang ◽  
A. Klimanek ◽  
Ashwani K. Gupta
Keyword(s):  
Carbon Monoxide ◽  
Fixed Bed ◽  
Calculated Data ◽  
Steam Gasification ◽  
Fixed Bed Reactor ◽  
Effect Of Temperature ◽  
Gas Composition ◽  
Wood Pellets ◽  
Feed Composition ◽  
High Yields

Equilibrium calculations using the element potential method have been used to determine optimum conditions for the gasification of wood pellets and to understand the limitations and influence of preheated gasifying agent on the product gas composition. The calculations were carried out under isobaric (1 atm) and isothermal conditions using cellulose as the waste fuel. For each isothermal case results were obtained for the effect of feed gas composition. Various mixtures of steam/cellulose [mol/mol] and oxygen/steam [mol/mol] were examined to determine conditions for high yields of H2 and CO at a given temperature. The yield of hydrogen and carbon monoxide with different input feed composition and temperature of the process are therefore considered. The results showed strong effect of temperature on hydrogen and carbon monoxide yield in the gasified product stream. High temperatures resulted in high yields of hydrogen. Pure steam resulted in higher yields of hydrogen than steam-air gasifying agent. The experimental results using a fixed bed reactor showed good trends with the calculated data. These results assist in the design and development of enhanced hydrogen production from steam gasification of wastes.

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