Title: Pyrolysis of long flame coal under steam atmosphere in a fluidised-bed reactor

Authors: Airong Li; Daohong Wu; Qicheng Wang; Weiwei Liu; Buping Bao

Addresses: College of Chemistry and Chemical Engineering, Southwest Petroleum University, No.8 Xindu Avenue, Xindu District, Chengdu, Sichuan Province, China ' Beijing Shenwu Environment Energy Technology Corp Technology, Shenniu Road 18, Machikou Town, Changping District, Beijing, China ' Beijing Shenwu Environment Energy Technology Corp Technology, Shenniu Road 18, Machikou Town, Changping District, Beijing, China ' Beijing Shenwu Environment Energy Technology Corp Technology, Shenniu Road 18, Machikou Town, Changping District, Beijing, China ' College of Chemistry and Chemical Engineering, Southwest Petroleum University, No.8 Xindu Avenue, Xindu District, Chengdu, Sichuan Province, China

Abstract: Steam pyrolysis is a technology defined as the thermal decomposition of coal through the application of heat in the presence of water vapour provided as a pyrolysis atmosphere. In this work, the steam pyrolysis of long flame coal particles in a fluidised-bed reactor was investigated in detail. It focuses on evaluating factors that may impose possible effect on the yields and properties of final products in terms of type of sweeping gas, coal particle size, pyrolysis time, temperature and water flow rate etc. It is observed that water vapour is a reactive agent and involved in the reduction/reforming reaction of CmHn hydrocarbons and coal gasification. It accelerates the structure destruction, diffusion and decomposition of hydrocarbons, especially for those compounds with high molecular weight. The optimal steam pyrolysis conditions for coal particles with the range of 0.5-2.8 mm are at 600°C of pyrolysis temperature and with 15 minutes of pyrolysis time. [Received: October 7, 2015; Accepted: March 2, 2015]

Keywords: steam pyrolysis; coal particles; long flame coal; steam atmosphere; fluidised bed reactors; thermal decomposition; water vapour; hydrocarbons; coal gasification.

DOI: 10.1504/IJOGCT.2016.075845

International Journal of Oil, Gas and Coal Technology, 2016 Vol.12 No.1, pp.51 - 62

Received: 18 Oct 2014
Accepted: 02 Mar 2015

Published online: 07 Apr 2016 *

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