Citation: CHEN Hong-gang, WANG Teng-da, ZHANG Kai, NIU Yu-guang, YANG Yong-ping. Thermodynamic analysis of carbon deposition on catalyst for the production of substitute natural gas[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(8): 978-984. shu

Thermodynamic analysis of carbon deposition on catalyst for the production of substitute natural gas

1.
North China Electric Power University, National Thermal Power Engineering & Technology Research Center, Beijing 100206, China

Corresponding author: CHEN Hong-gang,
Received Date: 26 May 2013
Available Online: 17 June 2013
Fund Project: 国家高技术研究发展计划(863计划, 2009AA050903) (863计划, 2009AA050903) 国家自然科学基金(51076043) (51076043) 重质油国家重点实验室开放基金(SKLOP201103001). (SKLOP201103001)

A comprehensive thermodynamic analysis was made on the carbon deposition behavior for the production of substitute natural gas (SNG) through syngas methanation. The component concentrations and the equilibrium constants of ten reactions involved in the syngas methanation were calculated at different temperatures; the effects of temperature, pressure, and the addition of other compounds in the feed gas on the behavior of carbon deposition were investigated. The results indicated that the catalyst bed is prone to carbon deposition at 550~800 ℃ and 0.1~1.5 MPa; as a result, lower temperature, higher pressure, and a larger H₂/CO ratio are suitable for the methanation reactions. The addition of steam in the feed gas may alleviate the carbon deposition to a large extent, whilst a large amount of CO₂ or CH₄ in feed gas may lead to carbon deposition.
- substitute natural gas,
- methanation,
- thermodynamic analysis,
- carbon deposition
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