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甲醇分解产物作车用燃料,完全取代汽油是代用燃料领域中较为活跃的课题之一.本文采用 CDS-810微型反应装置,对镍系甲醇分解用催化剂进行了评价和筛选,着重改进其应用性能和寿命.结果表明:在本文实验条件下,NiK 较为适宜的负载量分别为3和2mg·atm/g·Al_2O_3;贵金属元素 Pt 的加入能显著提高镍系催化剂的使用寿命;本文研制的 Ni(3)-K(2)-Pt(0.05)mg·atm/g·Al_2O_3催化剂,在370℃,0.2ml/min 甲醇进料速度(催化剂装填量为0.5g)下,连续使用时间超过150小时,反应期间,主产物 H_2的平均产率约为82%(以甲醇计),产物气体中无付产物.从而在原 Ni 系催化剂的基础上,开发出一类新型的 Ni 系催化剂,即 Ni 和 Pt 同时使用的贵金属与贱金属复合型催化剂,并对其寿命进行了初步研究,该类催化剂有希望发展成一类新型的甲醇“车载分解”催化剂.
Methanol decomposition products as a vehicle fuel, completely replace gasoline is one of the more active in the field of alternative fuels.In this paper, the use of CDS-810 micro-reactor, nickel catalyst for methanolysis were evaluated and screening, focusing on improving its application performance And life expectancy.The results show that the suitable loadings of NiK are 3 and 2 mg · atm / g · Al_2O_3 respectively under the experimental conditions of this paper. The addition of Pt, a precious metal element, can significantly improve the service life of Ni-based catalysts. The Ni 3) -K (2) -Pt (0.05) mg · atm / g · Al 2 O 3 catalyst was continuously used for more than 150 hours at 370 ° C with a methanol feed rate of 0.2 ml / min (catalyst loading 0.5 g) During the reaction, the average yield of the main product H 2 was about 82% (in terms of methanol), and no product was produced in the product gas, thus a new type of Ni-based catalyst was developed based on the original Ni-based catalyst, ie Ni and Pt At the same time, the noble metal and the base metal composite catalyst are used together, and the life of the composite catalyst is preliminary studied. The catalysts of the type are promising to be developed into a new type of methanol “vehicle decomposition” catalyst.