Cr催化剂制备方法对性能的影响.pdfVIP

学兔兔 化 工 进 展 2010年第29卷第4期 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS ·659· 甘油氢解Cu／Cr催化剂制备方法对性能的影响 欧建雄，兰支利，尹笃林，杨春华，欧兰英 (湖南师范大学精细催化合成研究所，湖南 长沙410081) 摘 要：Cu／Cr催化剂由于Cu对C—c键氢解活性很低，对C一0键氢解活性很高而成为甘油氢解制1,2一丙二醇 效果最好的固体催化剂。采用5种方法制备了Cu／Cr催化剂，并用于甘油的催化氢解反应，发现Cu／Cr催化剂的 制备方式极大地影响着其对甘油的催化氢解性能。以5种方法制备的Cu／Cr催化剂中，对甘油的催化氢解性能依 次是：铜氨络合沉淀法Adkins法碳酸钠沉淀法硅藻土浸渍法干混法。运用 XRD、TG、BET、FTIR、 TPR等表征手段对制备的催化剂结构进行了表征，详细分析了不同方式制备的催化剂的结构差异，将催化剂的 结构表征结果与催化反应性能进行关联分析和讨论，并从理论上解释了催化剂结构差异和催化氢解性能的关系。 关键词：催化氢解；Cu／Cr催化剂；制备方式；甘油 中图分类号：O643 文献标识码：A 文章编号：1000—6613(2010)04—0659—06 Influence 0f preparati0n methods of Cu／Cr catalyst for hydr0gen0lysis of glycerol OU Jianxiong，LANZhili，YINDulin，YANG Chunhua，OU Lanying (Institute of Fine Catalysis and Synthesis，Hunan Normal University，Changsha 410081，Hunan，China) Abstract：Cu／Cr catalyst exhibits superior catalytic hydrogenolysis activity in glycerol hydrogenolysis to 1，2-propanediol for its efficient hydrogenolytic activity towards C一0 bond and poor activity towards C—C bond．Cu／Cr catalysts were prepared by different methods and examined for the glycerol hydrogenOlysis reaction．Experimental results indicated that preparation methods have large effects on the glycerol hydrogenolysis．Among five catalysts prepared，the catalytic hydrogenOlysis activity was found in the order of copper ammonia complexation methodAdkins methodsodium carbonate methoddiatomite impregnation methoddry—mixed method．XRD，TG，BET，FT-IR and TPR were used to measure and analyse the structural differences of catalysts prepared by different methods．The correlation and structural e