FePVAsMo杂多化合物膜催化低碳醇选择氧化反应的研究

Selective Oxidation of Light Alcohols over FePVAsMo Heteropoly Compound Membrane

用组合法合成 Hx Fe0 - 1 .7P1 .1 V1 .1 As0 .4 4- 1 .1 Mo1 2 Oy 杂多化合物 ,并将其以浸渍法负载于多孔钛片上制成催化剂膜 ,在自制膜式反应釜中选择性催化氧化低碳醇 ,探讨了 As、 Fe含量及不同膜焙烧温度对催化剂催化性能的影响 ;用 TPR、 IR、 TG- DTA对杂多化合物进行表征 .结果表明 ,Fe的引入 ,可大大提高催化剂的活性和反应的选择性 ;As的引入 ,使催化剂的氧化脱氢能力大幅提高 ;膜焙烧温度为 4 0 0℃时 ,催化剂的活性、选择性与稳定性最佳 .组成为 Hx Fe0 .84 P1 .1 V1 .1 As0 .75Mo1 2 Oy 的杂多化合物膜催化剂对低碳醇具有良好的催化氧化活性、稳定性及再生能力 .在适宜的条件下催化乙醇氧化 ,乙醛收率可达 95 .2 % ,对丙醇、丁醇也有良好的催化活性 .

The H x Fe a P 1.1 V 1.1 As b Mo 12 O y heteropoly compound catalytic membranes supported on porous titanium plate were prepared by impregnation. The catalysts were characterized by TPR, IR and TG\|DTA techniques. Catalytic selective oxidation of light alcohols was carried out in a self\|made membrane reactor. The effects of As, Fe contents and calcining temperature of membrane on activity of the catalytic membrane were studied. The results show that the addition of Fe is very important for increasing the activity and selectivity, and As markedly improve the performance of oxidative dehydrogenation. The catalysts calcined at 400 ℃ have the highest activity. The H x Fe 0.84 P 1.1 V 1.1 As 0.75 Mo 12 O y heteropoly compound membrane catalysts have high activity and good stability, when they were used to catalyze ethyl alcohol at 220 ℃ with the acetaldehyde yield of 95.2%. The catalysts also have high catalytic activity for the oxidation of other light alcohols such as butanol, propanol.