In situ hydrogenation of captured CO2 to formate with polyethyleneimine and Rh/monophosphine system
作者:Yu-Nong Li、Liang-Nian He、An-Hua Liu、Xian-Dong Lang、Zhen-Zhen Yang、Bing Yu、Chao-Ran Luan
DOI:10.1039/c3gc41265b
日期:——
CO2 in the air can be efficiently captured with simultaneous activation by PEI (polyethyleneimine) to form ammonium carbamate and/or carbonate species. Thus, the in situ hydrogenation of captured CO2 into energy-storage materials rather than going through the desorption of conventional CCS (carbon capture and storage) runs better in comparison with equivalent gaseous CO2, thus validating this potential application of CCU (carbon capture and utilization) for supplying renewable energy. PEI600 as an effective carbon absorbent in this study could also be assumed to serve as both ligand and base to promote the catalytic hydrogenation of captured CO2, consequently acting as a ‘hinge base’ to combine capture and hydrogenation processes. The pathway was studied by NMR and in situ FT-IR spectroscopy under CO2 pressure. This protocol could open up great potential in transforming the captured CO2 from waste to fuel-related products.
空气中的二氧化碳可以通过聚乙烯亚胺(PEI)的同时激活高效捕获,形成氨基碳酸盐和/或碳酸盐物质。因此,捕获的二氧化碳在原位氢化为能量储存材料,而不是通过传统的碳捕获和储存(CCS)进行脱附,与等量气态二氧化碳相比表现更佳,从而验证了碳捕获与利用(CCU)在提供可再生能源方面的潜在应用。本研究中PEI600作为有效的碳吸附剂,还可以被认为同时作为配体和碱,以促进捕获的二氧化碳的催化氢化,从而充当“铰链碱”,将捕获与氢化过程结合在一起。该路径通过在二氧化碳压力下的核磁共振(NMR)和原位傅里叶变换红外光谱(FT-IR)进行了研究。这个方案可能在将捕获的二氧化碳从废物转化为燃料相关产品方面开辟巨大的潜力。