Improvement of SAPO-34 performance in MTO reaction by utilizing mixed-template catalyst synthesis method
Improvement of SAPO-34 performance in MTO reaction by utilizing mixed-template catalyst synthesis method
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DOI：
10.1016/j.jngse.2014.07.015
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发表时间：
2014-09
影响因子：
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通讯作者：
R. Rostami;M. Ghavipour;R. Behbahani;A. Aghajafari
中科院分区：
文献类型：
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作者：
R. Rostami;M. Ghavipour;R. Behbahani;A. Aghajafari
以四乙基氢氧化铵（TEAOH）和吗啉结构导向剂（SDA）为单一模板剂和混合模板剂合成了磷酸硅铝（SAPO-34）分子筛。采用XRD、SEM和BET等手段研究了不同类型和组合的模板剂对SAPO-34分子筛结构和形貌的影响。在固定床反应器上考察了合成的SAPO-34对甲醇制烯烃反应的催化性能。与单一模板剂SAPO相比，混合模板剂催化剂具有更大的比表面积、更小的粒径、更高的低碳烯烃（C2=-C4=）选择性和更长的寿命。
In the present study, the silicoaluminophosphate (SAPO-34) molecular sieves were synthesized by one of tetraethyl ammonium hydroxide (TEAOH) or morpholine structure-directing agents (SDAs) as the single-template and their mixture as the mixed-template methods. The effects of different types and combinations of templates on the structure and morphology of SAPO-34 molecular sieves were investigated by XRD, SEM and BET techniques. The catalytic performance of the synthesized SAPO-34's were investigated in a fixed-bed reactor for methanol to olefin (MTO) reaction. In comparison to single-template SAPO's, mixed-template catalyst possessed larger surface area, smaller particle size and exhibited higher selectivity to light olefins (C2=–C4=) and longer lifetime.