钴钼耐硫变换催化剂的制备研究化学工艺专业论文.docxVIP

山东科技大学硕士学位论文摘要 山东科技大学硕士学位论文 摘要 摘 要 在 CO 变换工艺中，传统工艺制备的钴-钼系耐硫变换催化剂因具有较高的催化活 性、较长的使用寿命、有突出的耐硫和抗毒性能、以及较好的选择性而备受青睐。然而 此类催化剂在制备过程中需要消耗大量的浓氨水，浓氨水的大量使用严重危害了操作工 人的人身安全，并且污染了周边环境。 本文研究了一种新型钴-钼系耐硫变换催化剂的制备工艺。新工艺下钴-钼活性组分 分步负载，钼活性组分通过混捏法负载于催化剂载体，这与传统的浸渍法负载相比，避 免了传统工艺配制钴-钼浸渍溶液需要大量浓氨水助溶而污染环境的问题；钴活性组分通 过浸渍法与催化剂载体负载。 在研究这种新工艺催化剂的活性过程中，采用常压微反装置，考察了不同活性组分 含量对催化剂变换活性的影响。得出最佳的活性组分含量为 CoO 1.0wt%、MoO3 7.0~9.0 wt% 、K2 O 5.0~7.0 wt%。同时考察了不同的工艺条件对催化剂变换活性的影响。得出最 佳工艺条件为：空速：3000h-1 ，水气比：0.8。实验表明研制的催化剂有较好的热稳定性 。 在相同工艺条件下与钴-钼工业催化剂进行 CO 转化率对比，新工艺催化剂在中温条 件下 CO 转化率能达到 90%以上，活性优于工业催化剂。表明新工艺催化剂不仅解决了 制备过程中浓氨水污染环境的难题，而且具有较高的催化活性，工业应用前景很乐观。 关键词：新工艺；钴钼耐硫变换催化剂；活性表征；硫化；CO 变换 山东科技大学硕士学位论文Ab 山东科技大学硕士学位论文 Abstract Abstract In the CO shift technology, the Co-Mo sulfur-resista nt shift catalyst made by the traditiona l preparation gains popularity because of it’s high catalytic activity, long lifet ime, outsta nding sulfur and poison resista nce, excellent select ivity. However, plenty of strong aqua ammonia will be consumed during the process of catalyst preparation, which does not only harm to the safety of workers, but also pollutes the surrounding environment. This paper studies the preparation technology of a new Co-Mo sulfur-resista nt shift catalyst. The active components of cobalt and molybdenum are loaded on the supports at two stags. The active component of molybdenum is loaded on the supports with the met hod of mixing and kneading. Compared with the traditiona l impregnating met hod to load the two active components, it settles the problem of environmental pollution which is caused by the plenty of strong aqua ammonia needed to promote the solution of cobalt and molybdenum in the traditiona l preparation of impregnating solution. The active component of cobalt is loaded on the supports with the impregnating met hod. In the process of studying the activity of this new technology catalyst, the atmosphere micro-reactor were adopted to study the effects of different active components cont