首页|A thermodynamic view on the in-situ carbon dioxide reduction by biomass-derived hydrogen during calcium carbonate decomposition

A thermodynamic view on the in-situ carbon dioxide reduction by biomass-derived hydrogen during calcium carbonate decomposition

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In the carbonate industry,deep decarbonization strategies are necessary to effectively remediate CO2.These strategies mainly include both sustainable energy supplies and the conversion of CO2 in down-stream processes.This study developed a coupled process of biomass chemical looping H2 production and reductive calcination of CaCO3.Firstly,a mass and energy balance of the coupled process was established in Aspen Plus.Following this,process optimization and energy integration were implemented to provide optimized operation conditions.Lastly,a life cycle assessment was carried out to assess the carbon footprint of the coupled process.Results reveal that the decomposition temperature of CaCO3 in an H2 atmosphere can be reduced to 780 ℃(generally around 900 ℃),and the conversion of CO2 from CaCO3 decomposition reached 81.33％with an H2∶CO ratio of 2.49 in gaseous products.By optimizing systemic energy through heat integration,an energy efficiency of 86.30％was achieved.Additionally,the carbon footprint analysis revealed that the process with energy integration had a low global warming potential(GWP)of-2.624 kg·kg-1(CO2/CaO).Conclusively,this work performed a systematic analysis of intro-ducing biomass-derived H2 into CaCO3 calcination and demonstrated the positive role of reductive calcination using green H2 in mitigating CO2 emissions within the carbonate industry.

BiomassCaCO3 reductive calcinationChemical loopingHydrogen productionCarbon footprintThermodynamics process

Peng Jiang、Hao Zhang、Guanhan Zhao、Lin Li、Tuo Ji、Liwen Mu、Xiaohua Lu、Jiahua Zhu

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State Key Laboratory of Materials-oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaState Key Laboratory of Materialsoriented Chemical EngineeringCultivation Program for The Excellent Doctoral Dissertation of Nanjing Tech University

2197812891934302ZK2020063800124701

2024

10.1016/j.cjche.2023.12.017

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2024.68(4)
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