堇青石质整体式催化剂的制备及其催化噻吩加氢脱硫性能

采用涂敷法将工业加氢脱硫催化剂(FH UDS)负载到草酸预处理过的堇青石上，制得堇青石基负载FH-UDS新型整体式催化剂，用XRD、N2吸附脱附、SEM和XPS等分析手段对所制备催化剂的结构进行了表征，并以噻吩加氢脱硫为模型反应，基于高压固定床反应装置，对所制备催化剂的加氢脱硫(HDS)性能进行了实验研究。结果表明，酸处理增大了堇青石的比表面积，使其Mg、Al含量急剧减少，但未改变其物相结构；堇青石预处理条件、活性胶的pH值以及扩孔剂的加入对催化剂性能影响较大。在满足机械强度要求情况下，堇青石预处理时的酸浓度越大，煮沸时间越长，涂敷效果越好，催化剂的HDS活性越好；由质量分数50%草酸煮沸4 h的堇青石、pH=3的活性胶制备的催化剂具有较好的加氢脱硫活性，当反应温度为350℃时，噻吩的转化率已达到95%；在活性胶中加入尿素扩孔剂有利于催化剂活性的提高，反应温度较低时，此作用更显著。当反应温度为300?℃和325?℃时，噻吩的转化率分别由66%，78%提高到77%，91%。

Preparation of monolithic catalysts and their performance in the hydrodesulfurization of thiophene

Cordierite monolithic catalysts were prepared by loading the industrial hydrodesulfurization catalyst FH-UDS.The structure of the catalysts was characterized by means of XRD,N2 adsorption/desorption measurements,SEM and XPS.Theircatalytic performance in hydrodesulfurization(HDS) was evaluated in a fixed bed reactor by taking thiophene hydrodesulfurization as a model reaction.The results indicated that the surface area of cordierite was increased and Al3+ and Mg2+ ions were removed from the silicate structur...