Keywords

coal gasification, CO2, catalysts, gas products

Abstract

CO2 capture and utilization caused more and more public attention because of its environmental impact. The objective of this work was to study the catalytic gasification of a sub-bituminous coal from the Powder River Basin (PRB) using a CO2 and H2 O mixture as the gasifying agent. Sodium and iron, in the form of inexpensive compounds, were chosen to catalyze the coal gasification. The experiments were conducted between 700 and 900 °C in a fixed-bed laboratory gasifier under the atmospheric pressure. Results show that the added catalysts had an effect on the composition of gas products in a way different from it in pure steam gasification. Fitting models for kinetic data were examined and the results show that addition of 3 wt% Na or 3 wt% iron led to a 28.0% or a 19.5% reduction in the activation energy of the gasification reaction, respectively. The sodium and iron in the coal char were characterized and the results show that sodium is more evenly distributed than iron during gasification. Suggestions for improving the catalysts' performance in coal gasification were proposed accordingly.

Original Publication Citation

Fan Zhang, Maohong Fan, Xin Huang, Morris D. Argyle, Bo Zhang, Brian Towler, Yulong Zhang, Catalytic gasification of a Powder River Basin coal with CO2 and H2O mixtures, Fuel Processing Technology, Volume 161, 2017, Pages 145-154, ISSN 0378-3820, https://doi.org/10.1016/j.fuproc.2017.03.010.

Document Type

Peer-Reviewed Article

Publication Date

2017-03-27

Publisher

Fuel Processing Technology

Language

English

College

Ira A. Fulton College of Engineering

Department

Chemical Engineering

University Standing at Time of Publication

Associate Professor

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