Ni-NiO/γ-Al2O3催化四氢糠醇制备吡啶的性能研究

The study on performance of Ni-NiO/γ-Al2O3 catalyst for catalytic reaction from THFA to pyridine

摘要:

研究了催化剂Ni-NiO/γ-Al2O3催化四氢糠醇(THFA)与氨气在固定床反应器中制备吡啶的工艺，并对催化剂的结构进行了表征。评价不同含量催化剂Ni-NiO/γ-Al2O3对四氢糠醇与氨气反应合成吡啶及其主要副产物的催化效果，考察了温度、氨醇摩尔比、液时空速等对该催化反应的影响。确定催化剂Ni-NiO/γ-Al2O3的催化效果为：随着催化剂组分Ni-NiO含量的升高，吡啶与异喹啉的含量随之升高，而哌啶的含量随之降低；在350℃~550℃，随着温度的升高，吡啶的含量随之升高，而副产物哌啶的含量随之降低，异喹啉在400℃含量较高。

Abstract:

The catalytic process of tetrahydrofurfuryl alcohol(THFA) and ammonia by fixed-bed reactor to give pyridine was studied. Various Ni-NiO content of Ni-NiO/γ-Al2O3 catalysts were prepared. The catalyst was characterized. The catalytic effect of the reaction between tetrahydrofurfuryl alcohol and ammonia to obtain pyridine and other main byproducts was estimated. The influences of temperature, molar ratio of ammonia and THFA， and LHSV on the catalytic reaction were investigated. The catalytic results of Ni-NiO/γ-Al2O3 catalyst were given as the followings. With the increase of Ni-NiO content in catalyst, the content of pyridine and isoquinoine in products increases. Piperidine content decreases; In certain temperature range between 350℃~550℃, with the temperature increasing, pyridine content in products increases. Piperidine content decreases. Isoquinoline content has higher value at the temperature of 400℃.