面向实用的新型MOFs@三氧化二铝多级结构功能材料的设计及其油品高效吸附脱硫性能研究

吸附脱硫法生产低含硫高辛烷值清洁汽油的关键在于吸附剂。目前常用传统吸附剂如活性炭，沸石，混合金属氧化物等存在吸附脱硫选择性差和脱硫效率低的问题。MOFs粉体虽然对油品中含硫化合物能够进行高效、高选择性和深度吸附脱除的潜能已经展现出来，但存在水热稳定性不足、孔容利用率和吸附硫容量偏低、实际使用操作不便、难以重复使用和回收的问题。本项目提出以具有良好机械强度和流动性、高比表面积、易分离回收的毫米级球形Al2O3为载体、利用三氧化二铝载体中孔道的限域性能通过化学键合作用将具有比表面积大、孔道（孔径和形状）和洞穴等周期性有序且可调节、金属离子类型和配体结构（含官能团）可设计调谐等特点的金属有机骨架化合物（MOFs）键和生长于载体表面，设计制备分散度高、扩散通道短的、水热稳定性高和使用方便的负载型纳米MOFs@Al2O3多级结构吸附剂，实现对油品中的含硫化合物的高效选择性和高效深度吸附脱除。

Efficient adsorptive desulfurization of fuel oil relies substantially on adsorbent. Current and tranditional adsorbents such as active carbon, zeolites and mixed metal oxides suffer problems of low selectivity and low efficiency. The emerging powdered MOFs show high potential to remove selectively sulfur-containing substances, but suffer problems of relative low hydrothermal stability, low pore volume utilization ratio, inconvenient performance and recycle. In this project micrometer-sized spherical Al2O3 beads, which have good mechanical strength and mobility, high surface area, easy performance and recycle, will be used as support to immobilize metal-organic frameworks(MOFs) featuring high surface, tunable regular channels and caves and high potentials of adsorptive desulfurization of fuel. MOFs will be highly dispersed with short diffusion path and high hydrothermal stability within the resulted hierarchical structured MOFs@Al2O3, and will be practically and conveniently used for adsorptive desulfurization of fuel oil with high selectivity and efficiency.