A novel route to synthesize SAPO-11 molecular sieves with a high external surface area in the presence of ethylene glycol and supercritical carbon dioxide for 1-octene hydroisomerization to dimethylhexanes

作者：Wen, Chenglong; Han, Shanlei; Xu, Jundong; Fan, Yu^*

来源：Journal of Catalysis, 2017, 356: 100-110.

DOI：10.1016/j.jcat.2017.05.021

• SAPO-11
• Supercritical carbon dioxide
• Ethylene glycol
• External surface area
• Dibranched hydroisomerization

The article proposes a novel and eco-friendly method for synthesizing SAPO-11 in ethylene glycol (EG) and supercritical carbon dioxide (ScCO2). The method incorporates ScCO2 into EG to decrease the solubility of SAPO-11 precursors in EG and thereby forms a highly supersaturated solution of SAPO-11 precursors. The as-synthesized SAPO-11 possesses smaller particles, a larger external surface area, and a larger number of acid sites than the SAPO-11 synthesized in EG and the SAPO-11 synthesized in water and ScCO2, respectively. These advantages of the as-synthesized SAPO-11 endow the corresponding catalyst with superior dibranched isomer selectivity and low cracking selectivity during 1-octene hydro isomerization.

• 出版日期2017-12
• 单位重质油国家重点实验室; 中国石油大学（北京）