Methanol aromatization over ZSM-5 catalysts prepared with different oxides
Methanol aromatization over ZSM-5 catalysts prepared with different oxides
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发表时间：
2014
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通讯作者：
D. Cha
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作者：
D. Cha
以ZSM-5分子筛为活性组分，制备了不同氧化物含量的ZSM-5催化剂，考察了催化剂对甲醇芳构化反应的性能，并用氮气吸附-脱附、NH3程序升温脱附等方法表征了催化剂的物化性能。结果表明，由这些氧化物制备的ZSM-5催化剂具有较好的甲醇芳构化性能，催化剂的酸性与其对甲醇芳构化反应的催化性能密切相关。锌/La-ZSM-5(Al_2O_3)催化剂具有较好的酸分布和孔结构，对甲醇芳构化反应具有较好的催化性能，在反应压力为0.1 Mpa，空速为0.8h-1，反应温度为437℃，反应时间为240min的条件下，芳烃收率为42.36%。
Using ZSM-5 molecular sieve as the active component,ZSM-5 catalysts prepared with different oxides were prepared.The performance of as-prepared catalysts for methanol aromatization was investigated.The physicochemical properties of the catalysts were characterized by N2adsorption-desorption,NH3temperature-programmed desorption,and powder X-ray diffraction.The results showed that ZSM-5 catalysts prepared with the oxides possessed the better performance for methanol aromatization.There was close correlation between the catalytic performance for methanol aromatization and acidity properties of the catalysts.Zn /La-ZSM-5(Al2O3) catalyst exhibited better catalytic performance for methanol aromatization due to its appropriate acid distribution and pore structure.The aromatics yield of 42.36% was attained under the reaction condition as follows: reaction pressure 0.1 MPa,space velocity 0.8 h- 1,reaction temperature437 ℃,and reaction time 240 min.