From cheap natural bauxite to high-efficient slurry-phase hydrocracking catalyst for high temperature coal tar: A simple hydrothermal modification
From cheap natural bauxite to high-efficient slurry-phase hydrocracking catalyst for high temperature coal tar: A simple hydrothermal modification
复制标题
从廉价的天然铝土矿到高温煤焦油的高效浆相加氢裂化催化剂：简单的水热改性
DOI：
10.1016/j.fuproc.2018.03.006
复制
发表时间：
2018
影响因子：
7.5
通讯作者：
Xiaojun Bao
中科院分区：
文献类型：
--
作者：
Yuanyuan Yue;Jiawei Li;Peng Dong;Tinghai Wang;Lilong Jiang;Pei Yuan;Haibo Zhu;Zhengshuai Bai;Xiaojun Bao
非常规重质原料的悬浮相加氢裂化(SPHC)被认为是填补日益增长的车用燃料需求和快速枯竭的常规原油供应之间的一种有前途的工艺。SPHC工艺的一次通过性质需要低成本但高性能的催化剂。本文报道了一种简单而有效的水热改性方法，以廉价的天然铝土矿为载体(HMB)制备性能优异的SPHC催化剂(HMBC)。作为对比，还制备了酸改性铝土矿衍生催化剂(AMBC)。系统地表征了HMB、HMBC、AMB和AMBC的物理化学性质，并在高温煤焦油(HTCT)的SPHC中评价了HMBC和AMBC的催化性能。结果表明，HMBC的HTCT加氢裂化活性优于AMBC，这是由于载体HMB的酸性较好，MoO_3与HMB的相互作用较弱，导致氧化钼物种的硫化程度较高，从而为加氢裂化提供了更多的活性MoS_2相。此外，与已报道的酸处理相比，水热改性更简单、更节能、更环保，因此具有工业化应用的可行性。
Slurry-phase hydrocracking (SPHC) of unconventional heavy feedstocks is considered as a promising process to fill the gap between the ever-increasing demand for vehicle fuels and the fast-depleting supply of conventional crude oil. The one-through nature of SPHC processes requires low-cost yet high-performance catalyst. This article reports a simple but effective hydrothermal modification strategy to treat a cheap natural bauxite mineral as a support (HMB) to prepare SPHC catalyst (HMBC) with outstanding catalytic performance. For comparison, an acid-modified bauxite (AMB) derived catalyst (AMBC) was also prepared. The physicochemical properties of HMB, HMBC, AMB and AMBC were systematically characterized, and the catalytic performance of HMBC and AMBC was assessed in the SPHC of a high temperature coal tar (HTCT). The results showed that HMBC exhibited HTCT hydrocracking activity superior to AMBC, attributed to the more suitable acidity of the support HMB and the weaker interaction between MoO3and HMB that results in the higher sulfidation degree of molybdenum oxide species and thereby provides more active MoS2phases for hydrocracking. Furthermore, compared with the acid treatment previously reported, the hydrothermal modification is simpler, more energy-saving, and more environment-friendly and therefore is feasible for industrial application.