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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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制备方法对Al2O3掺杂Pt/WO3-ZrO2催化剂上正庚烷异构化反应的影响
DOI: 10.1016/S1872-2067(12)60540-3, PP. 898-905
Keywords: 铂,氧化钨,氧化锆,氧化铝掺杂,制备方法,正庚烷临氢异构化,质子酸位
Abstract:
？采用恒pH法和非恒pH法制备了Al2O3掺杂的Pt/WO3/ZrO2催化剂,并用N2吸附-脱附、X射线衍射、紫外-可见漫反射、CO化学吸附、X射线光电子能谱、27Al魔角旋转核磁共振和吡啶吸附红外等技术对催化剂进行了表征.结果表明,相比于非恒pH法制备的催化剂,恒pH法制备的催化剂具有较高的比表面积和Pt分散度,在H2气氛中产生更多的B酸位,从而表现出更高的催化正庚烷临氢异构化反应活性;在200℃和质量空速0.9h-1的反应条件下,正庚烷转化率达70.0%,明显高于非恒pH法制备的催化剂(43.5%).
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