期刊
RENEWABLE ENERGY
卷 167, 期 -, 页码 652-661出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2020.11.134
关键词
gasification; CO2 capture; CaO looping; TG-FTIR
资金
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [823745]
- Key Program for China-EU International Cooperation in Science and Technology Innovation [2018YFE0117300]
- Shaanxi Provincial Natural Science Foundation Research Program-Shaanxi Coal Joint Funding [2019JLZ-12]
The study found that a 2:1 ratio of N-2 to CO2 at 700 degrees Celsius resulted in a 25% reduction in CO2. The catalytic properties of CaO increased the concentration of H-2 in the produced syngas by up to 10%. However, a temperature of 800 degrees Celsius was too high for the carbonation reaction of CaO.
The most important challenge in solid feedstock thermal conversion methods is minimising CO2 emissions. In this work, the gasification of pine sawdust in a mixture of N-2 and CO2 was investigated for the reduction of CO2 by a calcium oxide loop. The experiments were conducted at 600, 700, and 800 degrees C in a fixed-bed reactor. The biomass was mixed with the calcium oxide at a ratio of 1:1. The chemical composition of the syngas was analysed using gas chromatography. Moreover, the high heating values of the received gas samples were calculated, and thermogravimetric analysis and Fourier-transform infrared spectroscopy analysis were performed to investigate the absorption of CO2 by CaO. The results of the gasification process showed that the syngas contained CO, CH4, CO2, H-2, N-2, and other low hydrocarbons. The most significant results were obtained for a 2:1 ratio of N-2 to CO2 at 700 degrees C, and a CO2 reduction of 25% was observed. Moreover, the catalytic properties of CaO increased the concentration of H-2 in the produced syngas by up to 10%. A temperature of 800 degrees C was too high for the carbonation reaction of CaO. This study presents a possible solution for achieving negative carbon emissions. (c) 2020 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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