化工学报Issue(2)：396-405,10.DOI:10.3969/j.issn.0438-1157.2014.02.005
干气中烷烃、烯烃新型分离吸附剂的研究进展
Advances in new type adsorbent for separating alkene from dry gas
摘要
Abstract
This review focuses on the research progress on new type adsorbent for olefin/paraffin in separating alkene in twenty years. Compared with the tradition adsorption via pi-complexation, the adsorption mechanism of the adsorbent for preferential adsorption of olefin is pore size, difference in molecular diffusion, hydrogen bond interaction or pi complexation in separation of olefin/paraffin. This kind of adsorbent includes metallo-organic frameworks, Engelhard Titanosilicate (ETS), mesoporous molecular sieve and high silica zeolite. The adsorbent for preferential adsorption of paraffin, such as aluminum methylphosphonate-α, zeolite imidazolate framework ZIF-7 and attapulgite, utilizes the interaction between methyl and paraffin. Olefin presents very high adsorption capacity in metallo-organic frameworks in contrast to other types of adsorbent, due to its high surface area, but the selectivity coefficient for olefin over paraffin is less than 2 at normal pressure. High silica zeolite exhibits satisfactory heat stability and acid stability, which is an excellent adsorbent in a kinetic based process for the separation of propene and propane. Mesoporous molecular sieves have little selectivity for olefin, so they do not meet the needs in industry. With some transition metal cations loaded, such as Cu+ and Ag+, the modified adsorbent possess favorable adsorption capacity and selectivity for olefin. The selectivity and adsorption capacity of ETS are satisfactory after several cycles of desorption, indicating that this adsorbent adapts to industrial applications.关键词
烷烃/烯烃/吸附剂/吸附/分离Key words
paraffin/olefin/adsorbents/adsorption/separation分类
能源科技引用本文复制引用
马士珍,苏宝根,鲍宗必,苏云,杨亦文,任其龙..干气中烷烃、烯烃新型分离吸附剂的研究进展[J].化工学报,2014,(2):396-405,10.基金项目
国家高技术研究发展计划项目（）2012AA040305。@@@@supported by the National High Technology Research and Development Program of China（）2012AA040305 （）
