Element Transformation and Gaseous Products Distribution for Lignite Gasification in Supercritical Water

Abstract:

Effects of factors on efficiencies of elements (C/H/N/S) and gaseous products were studied for lignite gasification in supercritical water. CO₂, CH₄ and H₂ are main gaseous products. Temperature plays the most important role. With higher temperature, total efficiencies of lignite and elements have linear increasement, and yields of CO₂, CH₄ and H₂ rise significantly while CO stays constant almostly. With pressure increasing, total efficiencies of lignite and elements are enhanced, and yields of CO₂ and CH₄ rise while change of H₂ and CO is small. With increasing of equivalence ratio of oxygen, efficiencies of C/H/N and lignite, yields of CO₂ and H₂ rise, but yield of CH₄ reduces. Increasing equivalence ratio of oxygen plays positive role in fixation of S on residues.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 2999-3004
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.2999
• Online since: October 2013
• Authors: Gui Fang Chen*, Yong Zhang, Shou Yan Chen, Chun Yuan Ma
• Keywords: Element, Gaseous Products, Gasification, Lignite, Supercritical Water

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