文献类型：期刊文献

英文题名：Highly efficient hydrogenation of carbonate to methanol for boosting CO 2 mitigation

作者：Xie, Zhicheng[1];Sun, Zheyi[1];Shao, Bin[1,2];Zhu, Yuanming[2];Ma, Rongting[1];Li, Su[1];Li, Jingkun[1];Chen, Yanxin[3];Liu, Honglai[1,4];Hu, Jun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Informat Sci & Engn, Key Lab Smart Mfg Energy Chem Proc, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Xian Univ Architecture & Technol, Coll Mat Sci & Engn, 13 Yanta Rd, Xian 710055, Shaanxi, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：495

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20242816672220);WOS:【SCI-EXPANDED(收录号:WOS:001266955100001)】；

基金：We acknowledge the financial support from the National Natural Science Foundation of China (22250005, 22278126) , Intergovernmental International Science and Technology Innovation Cooperation Key Project (2021YFE0112800) , China Postdoctoral Science Foundation (2023M741170) , and the Fundamental Research Funds for the Central Universities (2022ZFJH04) .

语种：英文

外文关键词：Carbonate-to-methanol; Hydrogenation of magnesite; H 2 utilization efficiency; Process simulation; Techno-economic analysis

摘要：The massive CO 2 emissions from the energy-intensive industrial sectors can trace to the thermal decomposition of raw mineral carbonates during high-temperature manufactories. To mitigate CO 2 emissions, we propose a novel strategy of carbonate-to-methanol through a highly efficient hydrogenation, where the carbon in mineral magnesite is used as a precious resource to unleash its tremendous value. More significantly, we break the tradeoff between the excessive H 2 for the complete magnesite conversion and the utilization efficiency of H 2 by the recycle usage of H 2 through the convenient gas -liquid separation of H 2 /CH 3 OH. Guided by the thermodynamic predictions, without any catalysts, the excessive H 2 accelerates the direct hydrogenation of magnesite in a twin tower at a relatively low temperature of 550 degrees C, almost approaching thermodynamic limit of 67 % CO selectivity at a complete magnesite decomposition. The outlet syngas with an extremely high molar ratio of H 2 to CO of 8 is further used for subsequent methanol production, achieving an outperformed 70 % CO conversion efficiency and over 99 % CH 3 OH selectivity. Comprehensive scale-up process simulations indicate that the proposed strategy could increase the H 2 utilization efficiency by over 80 %, where the carbon footprint assessment illustrates when the green H 2 from wind energy is supplied, the negative net CO 2 emissions of-5.6 kg CO2 /kg methanol at a low energy consumption of 10 MJ/kg methanol can be achieved, which highlights its promising industrialization prospects.