文献类型：期刊文献

英文题名：Synergistic promotions of K doping on CO2 capture and in situ conversion

作者：Xie, Zhicheng[1];Shao, Bin[1];Sun, Zheyi[1];Shi, Yaqi[1];Gao, Zihao[1];Li, Su[1];Li, Jingkun[1];Li, Yi[2];Liu, Honglai[1];Hu, Jun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Sinopec Grp, 22 Chaoyangmen North St, Beijing 100728, Peoples R China

年份：2024

卷号：70

期号：2

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20234715089682);WOS:【SCI-EXPANDED(收录号:WOS:001107493500001)】；

基金：We acknowledge the financial support from the National Natural Science Foundation of China (Nos. 22250005 and 22278126), Intergovernmental International Science and Technology Innovation Cooperation Key Project (2021YFE0112800), and the Fundamental Research Funds for the Central Universities (2022ZFJH04). Additional support was provided by the Sinopec Group Key Project.

语种：英文

外文关键词：iCCC; K doping; kinetics; LiL@RWGS; synergistic promotions

摘要：The integrated CO2 capture and conversion (iCCC) technology has been recognized as a promising strategy for upcycling the emitted CO2 into artificial carbon sequestration but still demands highly efficient dual functional materials (DFMs). We develop an efficient iCCC process of the integrated lithium-looping (LiL) and reverse water gas shift reaction through deeply understanding K doping in the novel K-x-Li4SiO4@Ni-y DFMs. The appropriate K doping enables the fast diffusion of CO2 and H-2 into the bulk DFMs through forming LiKCO3 surface eutectic layer as well as strongly interacts with catalyst Ni to generate new medium basic sites for synergistic promotions of CO2 capture and in situ conversion. More importantly, after the pelletization, the LP-K-0.2-Li4SiO4@Ni-10 DFM (20-40 mesh) avoids the agglomeration and achieves an excellent and stable iCCC cycle performance, with CO2 capture capacity of 3.8 mmol/g, CO2 conversion efficiency of 90%, and CO selectivity close to 100% at 550 degrees C in one fixed-bed column.