文献类型：期刊文献

英文题名：Dual-Functional NiMg2-x Cax Al-Hydrotalcite for Integrated CO2 Capture and In Situ Methanation

作者：Guo, Zhuoyu[1];Yuan, Changkun[2];Zheng, Lei[2];Fu, Yu[2,3];Gao, Yunfei[4];Zhang, Jun[2,3];Sun, Yuhan[1]

机构：[1]ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;[2]Chinese Acad Sci, Shanghai Adv Res Inst, CAS Key Lab Low Carbon Convers Sci & Engn, Shanghai 201210, Peoples R China;[3]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[4]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 201210, Peoples R China

年份：2024

卷号：12

期号：8

外文期刊名：ENERGY TECHNOLOGY

收录：;EI(收录号：20242316207991);WOS:【SCI-EXPANDED(收录号:WOS:001238536900001)】；

基金：This work was financially supported by National Key R&D Program of China (2022YFA1504701 and 2022YFB4101900), Jupeng Bio (HK) Inc., Gaolu Air Products and Chemicals (Shanghai) Energy Technology Co., Ltd., and Shanghai Functional Platform for Innovation Low Carbon Technology.

语种：英文

外文关键词：CO2 capture; dual-functional materials; hydrotalcite; methanation

摘要：Integrated carbon capture and conversion (ICCC) is a promising technology to achieve cost-effective carbon capture, usage, and storage. The development of efficient dual-functional materials (DFMs) is crucial for advancing ICCC in industrial applications. Herein, a series of NiMg2-xCaxAl-hydrotalcite (x = 0, 0.5, 1, 1.5, 2) DFMs are prepared and applied to integrated CO2 capture and methanation. Characterization results illustrate that magnesium stabilizes the porous structure of hydrotalcite, and calcium significantly modulates surface basicity. Codoping of Mg and Ca yields merits of both functions and leads to increased methanation efficiency. By optimizing the catalyst and operating conditions, NiMg0.5Ca1.5Al-hydrotalcite exhibits an excellent CO2 adsorption capacity of 313 mu mol g(DFM)(-1) and methane yield of 225 mu mol g(DFM)(-1) with almost full selectivity toward methane at 320 degrees C. NiMg0.5Ca1.5Al-hydrotalcite also exhibits good cyclability at 320 degrees C under ambient pressure. Overall, Mg and Ca codoped hydrotalcite offers a promising approach to construct bifunctional materials for efficient integrated CO2 capture and in situ methanation.