Title: Study on absorbing agent-assisted microwave gas entrained bed for coal gasification process

Authors: Minglei Lian; Lin Li; Wenfang Wu; Yuan Ge; Zhiling Bai

Addresses: Department of Chemistry and Chemical Engineering, Liupanshui Normal University, Liupanshui,Guizhou 553004, China ' Department of Chemistry and Chemical Engineering, Liupanshui Normal University, Liupanshui,Guizhou 553004, China ' Department of Chemistry and Chemical Engineering, Liupanshui Normal University, Liupanshui,Guizhou 553004, China ' Department of Chemistry and Chemical Engineering, Liupanshui Normal University, Liupanshui,Guizhou 553004, China ' Department of Chemistry and Chemical Engineering, Liupanshui Normal University, Liupanshui,Guizhou 553004, China

Abstract: A gas entrained flow experimental device of making water gas using microwave as a secondary heat source was established, and absorbing agent was used as the heat transfer medium. Under optimum conditions, the microwave energy consumption per unit mass of coal gasification was only 75.2 kJ · kg⁻¹, and the volume fraction of CO and H₂ in the water gas was 94.4%. The stable gasification temperatures or water gas compositions had nothing to do with the amounts of the coal for gasification. With the mass ratios of the coal to absorbing agent decreasing, the gasification temperatures were increased; the contents of CO₂, H₂ and CH₄ in the product water gas were reduced evenly, also, the content of CO was increased; the change in the amplitude of variation was anthracite < bituminous coal < lignite. The reaction rate can be greatly improved by using multi-branched parallel reactors instead of one single larger diameter reactor. [Received: August 22, 2015; Accepted: March 13, 2016]

Keywords: microwave; MnO₂-based-absorbing agent; gas entrained bed; coal gasification.

DOI: 10.1504/IJOGCT.2017.084833

International Journal of Oil, Gas and Coal Technology, 2017 Vol.15 No.4, pp.380 - 393

Received: 16 Oct 2015
Accepted: 13 Mar 2016
Published online: 30 Jun 2017 *

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