1. From cheap natural bauxite to high-efficient slurry-phase hydrocracking catalyst for high temperature coal tar: A simple hydrothermal modification
- Author
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Jiang Lilong, Wang Tinghai, Jiawei Li, Pei Yuan, Zhu Haibo, Yuanyuan Yue, Xiaojun Bao, Peng Dong, and Zhengshuai Bai
- Subjects
Materials science ,General Chemical Engineering ,Sulfidation ,Energy Engineering and Power Technology ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Hydrothermal circulation ,0104 chemical sciences ,Catalysis ,Cracking ,Bauxite ,Fuel Technology ,Chemical engineering ,Phase (matter) ,medicine ,engineering ,Slurry ,Coal tar ,0210 nano-technology ,medicine.drug - Abstract
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 MoO 3 and HMB that results in the higher sulfidation degree of molybdenum oxide species and thereby provides more active MoS 2 phases 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.
- Published
- 2018