Competition and Inhibition Effects during Coal Char Gasification in the Mixture of H2O and CO2
| Autor: | Meng X. Fang, Ke F. Cen, Zhong Y. Luo, Qin H. Wang, Rui Zhang |
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| Rok vydání: | 2013 |
| Předmět: |
Thermogravimetric analysis
Atmospheric pressure biology Chemistry business.industry General Chemical Engineering Energy Engineering and Power Technology Thermodynamics Active site Partial pressure Atmospheric temperature range Diluent Fuel Technology biology.protein Organic chemistry Coal Char business |
| Zdroj: | Energy & Fuels. 27:5107-5115 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef4007998 |
| Popis: | The mechanisms of char gasification in the mixture of H2O and CO2 are not clear, and some problems are yet to be solved. The Langmuir–Hinshelwood (L–H) model of char gasification in the mixture of H2O and CO2 and the inhibition effect between char–H2O and char–CO2 reactions are two controversial issues among these problems. This paper presented new data to elucidate these two issues. Experiments were carried out at atmospheric pressure using a modified thermogravimetric analyzer (TGA) system at various reactant partial pressures and within a temperature range of 1173–1273 K. The kinetic parameters in the L–H model were determined from pure H2O and CO2 gasification (N2 as a diluent). The experimental results showed that the L–H model based on common active site assumption is applicable to describe the experimental data and the pressure is not the reason leading to different results in validity experiments of common or separate active site assumptions. Including H2 and CO in the reactant gas does not change... |
| Databáze: | OpenAIRE |
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