Title: Insights into the co-combustion of coal and biomass mixtures using a copper-based oxygen carrier in chemical looping combustion

Authors: Mayur D. Kevat; Tamal Banerjee

Addresses: Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India ' Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India

Abstract: Chemical looping with oxygen uncoupling (CLOU), variant to chemical looping combustion (CLC), is working on strategies to transport gaseous oxygen for fuel combustion. The present work reports the process simulation of CLOU of a coal-biomass mixture with CuO oxygen carrier. Variations in the different parameters are compared by replacing pure coal with an equal fraction of coal-biomass mixture. The presence of alkaline earth metals in biomass is seen to increase the coal char conversion in the fuel reactor. The predicted carbon capture efficiency is found to increase with the fuel reactor temperature range of 900 to 965°C irrespective of fuel used. The carbon capture efficiency was also varied with the solids flow rate varying from 3.48 to 13.64 kg/h. The thermal power output for the coal-biomass mixture is further compared with published literature for pure coal in context of its CLOU mode of operation. [Received: March 2, 2018; Accepted: November 26, 2018]

Keywords: CLOU; coal; biomass; energy analysis; Aspen.

DOI: 10.1504/IJOGCT.2020.108853

International Journal of Oil, Gas and Coal Technology, 2020 Vol.25 No.1, pp.55 - 72

Received: 02 Mar 2018
Accepted: 26 Nov 2018
Published online: 05 Aug 2020 *

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