基于“高选择性吸附-反应强化再生”联用新机制的汽油深度脱硫醇过程

针对吸附法用于汽油深度脱硫醇时，由于油品组分的强竞争吸附导致难以深度脱硫，以及吸附和再生对吸附力强弱的要求矛盾这两大难题，本项目拟通过研究金属氢氧化物双功能吸附催化材料，使其吸附位可在吸附过程中实现高选择性吸附重硫醇，催化位可在再生过程中高效转化强吸附硫醇生成弱吸附、易脱附的硫醚，从而同时实现硫醇的高选择性吸附和材料的高效催化再生，进而构建常温可高效循环的吸附-再生汽油深度脱硫醇过程。本项目将（1）研制兼具高选择性脱硫醇和常温高效催化转化硫醇的金属氢氧化物双功能材料，相应发展反应强化吸附剂再生的新方法；（2）研究双功能材料的孔隙结构、碱性中心等对硫醇吸附选择性、吸附容量、吸附动力学等的影响规律，并研究硫醇在吸附催化材料表面的反应/脱附机理；（3）基于仿真模拟优化构建“高选择性吸附-反应强化再生”脱硫醇新过程和工艺。项目研究成果将助力形成汽油深度吸附脱硫醇的新理论和新技术。

The adsorptive removal of minute mercaptan from gasoline is challenging because of the strongly competitive adsorption between mercaptans and other components as well as the trade-off between high desulfurization selectivity and facile regeneration performance. Herein, we propose a room-temperature cyclic process of selective adsorption desulfurization-reactive regeneration over bifunctional metal hydroxide adsorbent for the ultra-deep desulfurization of mercaptans from gasoline. The bifunctional metal hydroxide adsorbent can act as an adsorbent to adsorb the mercaptan with high adsorption capacity and selectivity in the adsorption process, and as a catalyst to oxidize strongly-adsorbed mercaptan to readily desorbed sulfur species under ambient conditions in the following regeneration process. This project will: (1) develop the bifunctional metal hydroxide adsorbents with high adsorption selectivity and oxidation activity of mercaptans, and the corresponding reactive regeneration method of adsorbents at ambient conditions; (2) investigate the effect of pore structure and basic sites of supports on their adsorption selectivity, capacity, and kinetics; reveal the reactive regeneration mechanism of bifunctional materials; (3) build up the advanced process of ultra-deep desulfurization of gasoline based on the selective adsorptive desulfurization - reactive regeneration by process simulation. The proposed work will enrich the new theories and technologies of deep de-mercaptan for gasoline and it is of great importance for this subject.