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Study of mesoporous catalysts for conversion of 2,3-butanediol to butenes
Journal of Catalysis ( IF 7.3 ) Pub Date : 2017-09-09 , DOI: 10.1016/j.jcat.2017.08.017
Quanxing Zheng , Jason Grossardt , Haider Almkhelfe , Jiayi Xu , Brian P. Grady , Justin T. Douglas , Placidus B. Amama , Keith L. Hohn

In this study, three different types of mesoporous materials (Al-MCM-48, Al-SBA-15 and hierarchical ZSM-5 (meso-ZSM-5) where mesoporosity was introduced into ZSM-5 by sodium hydroxide treatment) were loaded with ∼20 wt% CuO and investigated in the conversion of 2,3-butanediol to butenes. The results showed that the introduction of mesopores on the catalysts (Al-MCM-48 and Al-SBA-15 types) could decrease the production of cracking products, especially C3= and C5=–C7= by comparison to the catalyst with ∼20 wt% CuO loaded on HZSM-5; meanwhile, the selectivity of C8= from oligomerization of butenes was found to increase with increasing pore size of the catalysts. In addition, Cu/meso-ZSM-5 catalyst has a performance with similarities to both Cu/ZSM-5 catalyst and mesoporous copper catalysts (Cu/Al-MCM-48 and Cu/Al-SBA-15) since both micropores (diameter of ∼0.55 nm) and mesopores (pore size of ∼23 nm) exist on meso-ZSM-5. Therefore, Cu/meso-ZSM-5 showed high activity for both cracking reactions (C3= and C5=–C7=) and oligomerization (C8=).



中文翻译:

2,3-丁二醇转化为丁烯的介孔催化剂的研究

在这项研究中,加载了三种不同类型的介孔材料(Al-MCM-48,Al-SBA-15和分层ZSM-5(介孔ZSM-5),其中通过氢氧化钠处理将介孔性引入ZSM-5)。约20 wt%CuO,并研究了2,3-丁二醇向丁烯的转化。结果表明,在催化剂(Al-MCM-48和Al-SBA-15型)上引入中孔可降低裂解产物的产生,特别是与催化剂相比,C 3 =和C 5 = –C 7 =在HZSM-5上负载约20 wt%的CuO; 同时,C 8的选择性=发现丁烯的低聚反应产生的NOx随着催化剂孔径的增加而增加。另外,Cu / meso-ZSM-5催化剂的性能与Cu / ZSM-5催化剂和中孔铜催化剂(Cu / Al-MCM-48和Cu / Al-SBA-15)相似,因为它们都具有微孔(直径)介孔ZSM-5上存在约0.55 nm(约0.55 nm)的介孔和介孔(约23 nm的孔径)。因此,Cu / meso-ZSM-5对裂化反应(C 3 =和C 5 = –C 7 =)和低聚反应(C 8 =)均显示高活性。

更新日期:2017-09-09
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