The Catalytic Performance Study Of Carbon Nitride Material And Ionic Liquids For Acetylene Hydrochlorination

Polyvinyl chloride(PVC)is the world's most widely production of plastic products.Because of PVC excellent characteristics,is widely used in all walks of life.In China,due to its unique energy structure,most of vinyl chloride monomer's produce through calcium carbide method in acetylene hydrochlorination.Mercuric chloride in acetylene hydrochlorination loaded onto activate carbon as a catalyst to catalyze the addition reaction of acetylene and hydrogen chloride.However,the disadvantage of mercuric chloride is highly toxic and volatile,endanger human body health and damage to the environment.Therefore,it is necessary to research and develop green environmental protections,cheap and easy obtain mercury-free catalyst instead of mercuric chloride catalyst.Gold base catalyst has good catalytic performance,but is expensive and has large industrial application consumption.In addition;gold elements used as currency,are not suitable for industrial production.Non-noble metal catalysis has a certain conversion rate for acetylene hydrochlorination,but the effect is far from the gold base catalyst.Therefore,we need to develop and design with the very good catalytic and stable performance,and raw materials cheaper catalysts used in the acetylene hydrogen chloride reaction.This paper based on the nonmetallic material of carbon and nitrogen catalyst study,discusses the nano flower carbon and nitrogen,and the application of ionic liquids in acetylene hydrogen chloride reaction.The main exploration from the following three aspects:1.The performance study of catalyst nitrogen doping nanoflower porous carbon(NPC).With diammonium and dianhydride as precursor,self-assembly by hydrothermal method follow on the high-temperature calcined into nitrogenous carbon catalyst.The prepared catalyst with different morphology,selected with the morphology of the optimal catalytic properties,and change the calcination temperature to the preparation of different nitrogen content of catalyst,through the experiment results show that nanoflower morphology has the optimal catalytic performance,when the calcination temperature is 800 ?,catalyst in the highest catalytic activity and contains the highest sum of pyridine nitrogen and pyrrole nitrogen content per unit of surface area.2.The performance research of catalyst ionic liquid loaded onto active carbon materia.Ionic liquid initially load on the carbon carrier can improve the catalytic performance of catalysts in this chapter content.Then replace the active carbon materia and nitrogen doped carbon material as the supporter to further improve the catalytic activity.The experimental results show that ionic liquid load on the selected nitrogen doped carbon material,cannot improve the catalytic performance on acetylene hydrochlorination.Combination BET,XPS analysis of catalyst,we think the cause of the poor catalytic performance is in the process of ionic liquid load,ionic liquids into the catalyst pore jams parts of channel and covered the active site,result in the catalytic performance was poor.3.The performance research of catalyst that TPPB load modified nitrogen doped carbon material.In the previous chapter,we explore the ionic liquid load carbon and nitrogen material performance is bad.In this section we try without destroying the nitrogen doping,on the basis of the morphology of nitrogen doped nanoflower porous carbon materials,with KOH as the expanding agent,using dry mixing nitrogen doping nano carbon materials for modification,design preparation contains proper amount of microporous and mesoporous proportion of carbon and nitrogen carrier with appropriate aperture size.By electron microscopy(SEM)test,show that nanoflower shapes are destroyed,and great changes have taken place in hole structure.The modified nitrogen doping nanoflower carbon catalyst has very poor catalytic activity.By analyzing the possible reason is that in the activation process of KOH,a large number of micropores are generated without increasing the mesopores,and the micropore diameter is small,leading to the diffusion of the gas affected,so that the catalytic reaction have been affected.