摘要: Ordered tungsten and aluminum co-doped mesoporous KIT-6 catalysts (W-Al-KIT-6) with different Si/Al molar ratios were successfully synthesized by a one-pot synthesis method. The obtained W-Al-KIT-6 catalysts were tested for catalytic conversion of 1-butene and ethene to propene via isomerization of 1-butene to 2-butene and subsequent cross metathesis of 2-butene and ethene. Various characterization techniques, such as ICP-OES, XRD, BET, TEM, Raman, XPS and NH3-TPD, were used to characterize the catalysts. The introduction of Al did not change the mesoporous structure of KIT-6 when the nominal Si/Al was 10, 20 or 30. Moreover, the sample demonstrated a larger amount of acidic sites. The W-Al-KIT-6 catalysts with suitable Si/Al ratios illustrated a superior catalytic performance to W-KIT-6 catalyst. The origin of catalytic performance enhancement over W-Al-KIT-6 catalysts is preliminarily discussed and ascribed to the highly disperse W species and a large amount of acidic sites. The acidic sites were formed by the introduction of a suitable amount of Al in the W-KIT-6 framework, which accelerated the isomerization of 1-butene to 2-butene and promoted the cross metathesis of 2-butene and ethene to propene.
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期刊:
NEW JOURNAL OF CHEMISTRY
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分类:
物理学
>>
普通物理:统计和量子力学,量子信息等
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引用:
ChinaXiv:201705.00612
(或此版本
ChinaXiv:201705.00612V1)
doi:10.12074/201705.00612
CSTR:32003.36.ChinaXiv.201705.00612.V1
- 推荐引用方式:
Liu, H [Liu, Huan][ 1,2 ],Tao, K [Tao, Kai][ 1 ],Zhang, PP [Zhang, Peipei][ 1 ],Xu, W [Xu, Wei][ 1 ],Zhou, SH [Zhou, Shenghu][ 1 ].(2017).Enhanced catalytic performance for metathesis reactions over ordered tungsten and aluminum co-doped mesoporous KIT-6 catalysts.NEW JOURNAL OF CHEMISTRY.[ChinaXiv:201705.00612]
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