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Use of H 3 PO 4 /ZrO 2 –TiO 2 –surfactant mixed oxide for catalytic vapor-phase dehydration of 1-octanol
Reaction Kinetics, Mechanisms and Catalysis ( IF 1.7 ) Pub Date : 2020-09-01 , DOI: 10.1007/s11144-020-01854-0
Hamidreza Aghaei , Mehran Ghiaci

Catalytic dehydration of 1-octanol over H3PO4/ZrO2–TiO2–surfactant (H3PO4/ZTS) mixed oxides at 350 °C for production of 1-octene was investigated. ZrO2–TiO2 (ZT) with Zr:Ti molar ratio = 1:1 was prepared with and without cetylpyridinium bromide surfactant and modified by different concentration of H3PO4. These catalysts were characterized by several methods such as XRD, BET, pyridine adsorption, and NH3-TPD. The prepared catalysts with surfactant showed better selectivity and activity than the prepared catalysts without surfactant for 1-octene synthesis. Maximum selectivity to 1-octene in 1-octanol dehydration was attained over 15 wt% H3PO4/ZTS, while maximum conversion of 1-octanol with lower selectivity to 1-octene was achieved over 35 wt% H3PO4/ZTS. At 350 °C and with WHSV 1.978 h−1, the maximum conversion of 1-octanol over 15 wt% H3PO4/ZTS was 68.8%, with 48.3% selectivity to 1-octene.



中文翻译:

H 3 PO 4 / ZrO 2 -TiO 2-表面活性剂混合氧化物在1-辛醇催化气相脱水中的应用

研究了H 3 PO 4 / ZrO 2 -TiO 2-表面活性剂(H 3 PO 4 / ZTS)混合氧化物在350°C下催化1-辛醇脱水制备1-辛烯的过程。在有和没有十六烷基溴化吡啶表面活性剂的情况下,制备Zr:Ti摩尔比= 1:1的ZrO 2 -TiO 2(ZT),并通过不同浓度的H 3 PO 4进行改性。这些催化剂通过XRD,BET,吡啶吸附和NH 3等几种方法进行了表征。-TPD。所制备的具有表面活性剂的催化剂显示出比未制备用于1-辛烯合成的表面活性剂的催化剂更好的选择性和活性。在15 wt%H 3 PO 4 / ZTS中达到了对1-辛醇脱水的1-辛烯的最大选择性,而在35 wt%H 3 PO 4 / ZTS中实现了具有较低选择性的1-辛醇向1-辛烯的最大转化率。。在350°C且WHSV为1.978 h -1时,相对于15 wt%H 3 PO 4 / ZTS的1-辛醇最大转化率为68.8%,对1-辛烯的选择性为48.3%。

更新日期:2020-09-02
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