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从流化催化裂化催化剂的钒中毒机理出发 ,研制出一种高岭土型抗钒助催化剂。试验表明 ,当助剂的基质负载钒后 ,基质中容易生成含钒莫来石 ,可将部分钒钝化 ;以高岭土为原料 ,用原位晶化工艺合成的分子筛有良好的耐钒能力 ;添加具有良好捕钒能力的金属氧化物得到的抗钒助剂具有良好的抗钒性能。
Starting from vanadium poisoning mechanism of fluid catalytic cracking catalyst, a kaolin anti-vanadium promoter was developed. The results showed that vanadium-bearing mullite was easily formed in the matrix and part of vanadium could be passivated when vanadium was added to the matrix of the additive; and the molecular sieve synthesized by the in-situ crystallization process had good vanadium tolerance with kaolin as the raw material; Anti-vanadium additives obtained by adding a metal oxide with good catching ability of vanadium have good vanadium resistance.