纳米催化氧化催化剂分解正己烷废气

Decomposition of n-hexane waste gas by nano-scale catalytic oxidation catalysis

某石化厂聚丙烯干燥尾气催化氧化装置出现问题后,对其市售新鲜催化剂和问题催化剂进行全面的检测与评价,结果显示,出现问题的主要原因为催化剂涂层强度低、热稳定性差。新鲜催化剂正己烷T98=395℃,而经1000℃焙烧后,其正己烷转化率低于80%。采用创新的纳米涂层与原子掺杂技术制备PDOⅢ催化剂,催化剂涂层脱落率低于0.11%,正己烷T98=345℃,1000℃焙烧后正己烷T98仅升高20℃,比市售同类催化剂具有更好的热稳定性和操作性能。

After the deactivation problems occurred in the catalytic oxidation device of polypropylene dry exhaust gas in a petrochemical plant,a comprehensive test and evaluation were conducted on the commercially available fresh catalysis and the problematic catalysis.The results showed that the main reasons for the problems were the low strengthand the poor thermal stabilityof the catalyst coating.The fresh catalyst n-hexane T98=395℃,but after calcination at 1000℃,the conversion of n-hexane is less than 80%.In this study,PDOⅢcatalysts were prepared usinginnovative nano-coating and atomic doping technology.The catalyst coating loss rate was less than 0.11%,n-hexane T98=345℃,and n-hexane T98 only rose by 20℃after calcination at 1000℃,which had better thermal stability and operationperformance than similar catalysts on the market.