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Title: A kinetic study of methanol synthesis in a slurry reactor using a CuO/ZnO/Al2O3 catalyst

Abstract

A kinetic model that describes the methanol production rate over a CuO/ZnO/AI203 catalyst (United Catalyst L-951) at typical industrial operating conditions is developed using a slurry reactor. Different experiments are conducted in which the H2/(CO+CO2) ratio is equal to 2, 1, and 0.5, respectively, while the CO/CO2 ratio is held constant at 9. At each H2/(CO+CO2) ratio the space velocity is set at four different values in the range of 3000-13,000 1/hr kgcat. The effect of H2/(CO+CO2) ratio and space velocity on methanol production rate, conversions, and product composition is further investigated. The results indicate that the highest methanol production rate can be achieved at H2/(CO+CO2) ratio of 1 followed by H2/(CO+CO2) ratio of 0.5 and 2 respectively. The hydrogen and carbon monoxide conversions decrease with increasing space velocity for all H2/(CO+CO2) ratios tested. Carbon monoxide hydrogenation appears to be the main route to methanol at H2/(CO+CO2) ratio of 0.5 and 2. On the other hand, carbon dioxide hydrogenation appears to be the main route to methanol at H2/(CO+CO2) ratio of 1. At all H2/(CO+CO2) ratios, the extent of the reverse water gas shift reaction decreases with increasing space velocity. The effect of temperature on the kinetics is examined bymore » using the same experimental approach at 508 K. It is found that a different reaction sequence takes place at each temperature. Also, a time on stream study is conducted simultaneously in order to investigate the characteristic of catalyst deactivation with time on stream. During the first 150 hours of time on stream, the catalyst loses approximately 2/3 of its initial activity before reaching a steady state activity.« less

Authors:
 [1]
  1. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
10159747
Report Number(s):
DOE/PC/89787-T4
ON: DE92016818
DOE Contract Number:  
FG22-89PC89787
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: TH: Thesis (M.S.); PBD: May 1992
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 10 SYNTHETIC FUELS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; METHANOL; SYNTHESIS; CARBON MONOXIDE; HYDROGENATION; CARBON DIOXIDE; COPPER OXIDES; CATALYTIC EFFECTS; ZINC OXIDES; ALUMINIUM OXIDES; HYDROGEN; QUANTITY RATIO; TEMPERATURE EFFECTS; TEMPERATURE RANGE 0400-1000 K; CATALYSTS; DEACTIVATION; EXPERIMENTAL DATA; CHEMICAL REACTORS; 010408; 100200; 400201; C1 PROCESSES; PRODUCTION; CHEMICAL AND PHYSICOCHEMICAL PROPERTIES

Citation Formats

Al-Adwani, Hamad Abdulwahab. A kinetic study of methanol synthesis in a slurry reactor using a CuO/ZnO/Al2O3 catalyst. United States: N. p., 1992. Web. doi:10.2172/10159747.
Al-Adwani, Hamad Abdulwahab. A kinetic study of methanol synthesis in a slurry reactor using a CuO/ZnO/Al2O3 catalyst. United States. https://doi.org/10.2172/10159747
Al-Adwani, Hamad Abdulwahab. 1992. "A kinetic study of methanol synthesis in a slurry reactor using a CuO/ZnO/Al2O3 catalyst". United States. https://doi.org/10.2172/10159747. https://www.osti.gov/servlets/purl/10159747.
@article{osti_10159747,
title = {A kinetic study of methanol synthesis in a slurry reactor using a CuO/ZnO/Al2O3 catalyst},
author = {Al-Adwani, Hamad Abdulwahab},
abstractNote = {A kinetic model that describes the methanol production rate over a CuO/ZnO/AI203 catalyst (United Catalyst L-951) at typical industrial operating conditions is developed using a slurry reactor. Different experiments are conducted in which the H2/(CO+CO2) ratio is equal to 2, 1, and 0.5, respectively, while the CO/CO2 ratio is held constant at 9. At each H2/(CO+CO2) ratio the space velocity is set at four different values in the range of 3000-13,000 1/hr kgcat. The effect of H2/(CO+CO2) ratio and space velocity on methanol production rate, conversions, and product composition is further investigated. The results indicate that the highest methanol production rate can be achieved at H2/(CO+CO2) ratio of 1 followed by H2/(CO+CO2) ratio of 0.5 and 2 respectively. The hydrogen and carbon monoxide conversions decrease with increasing space velocity for all H2/(CO+CO2) ratios tested. Carbon monoxide hydrogenation appears to be the main route to methanol at H2/(CO+CO2) ratio of 0.5 and 2. On the other hand, carbon dioxide hydrogenation appears to be the main route to methanol at H2/(CO+CO2) ratio of 1. At all H2/(CO+CO2) ratios, the extent of the reverse water gas shift reaction decreases with increasing space velocity. The effect of temperature on the kinetics is examined by using the same experimental approach at 508 K. It is found that a different reaction sequence takes place at each temperature. Also, a time on stream study is conducted simultaneously in order to investigate the characteristic of catalyst deactivation with time on stream. During the first 150 hours of time on stream, the catalyst loses approximately 2/3 of its initial activity before reaching a steady state activity.},
doi = {10.2172/10159747},
url = {https://www.osti.gov/biblio/10159747}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri May 01 00:00:00 EDT 1992},
month = {Fri May 01 00:00:00 EDT 1992}
}

Thesis/Dissertation:
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