THERMAL SCIENCE

International Scientific Journal

FEASIBILITY ANALYSIS OF A COMBINED CHEMICAL LOOPING COMBUSTION AND RENEWABLE-ENERGY-BASED METHANE PRODUCTION SYSTEM FOR CO2 CAPTURE AND UTILIZATION

ABSTRACT
Power-to-methane represents an innovative approach to convert electrical into chemical energy. Such a technology could actually be successful only when the coupling of a cost-effective source of electrical energy and a pure CO2 stream is carried out. Under this perspective, this paper numerically investigates an inno-vative process layout that integrates a fluidized beds chemical looping system for the combustion of solid fuels and a renewable-based power-to-methane system. Process performances were evaluated by considering a coal and three sewage sludge, differing in water content, as fuels, CuO supported on zirconia as oxygen carrier, hydrogen production via water electrolysis, and Ni supported on alumina as methanation catalyst. Autothermal feasibility of the process was assessed by considering that part of the produced CH4 can eventually be burned to dry high-moisture-content fuels. Finally, by considering that only electric energy from renewable sources is used, the capability of the proposed process to be used as an energy storage system was evaluated.
KEYWORDS
PAPER SUBMITTED: 2020-03-28
PAPER REVISED: 2020-05-15
PAPER ACCEPTED: 2020-06-16
PUBLISHED ONLINE: 2020-09-26
DOI REFERENCE: https://doi.org/10.2298/TSCI200328281B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE Issue 6, PAGES [3613 - 3624]
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© 2022 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence