Regeneration of spent resid fluidized catalytic cracking catalyst by removing metal poisons such as V, Ni, and Fe
Regeneration of spent resid fluidized catalytic cracking catalyst by removing metal poisons such as V, Ni, and Fe
复制标题
废渣油流化催化裂化催化剂脱V、Ni、Fe等金属毒物的再生
DOI：
10.1021/ie020515u
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发表时间：
2003
影响因子：
4.2
通讯作者：
S. Woo
中科院分区：
文献类型：
--
作者：
Sang Ku Park;H. Jeon;K. Jung;S. Woo
采用改进的Demet III和Demet IV工艺对渣油流化催化裂化（RFCC）催化剂进行脱金属毒物再生。总共33.1重量%的V，89.2重量%的Ni，和67.7重量%的Fe被除去由改性Demet III，和37.3重量%的V被选择性地除去由改性Demet IV。微活性试验（MAT）结果表明，再生后催化剂的活性和选择性有较大提高。MAT、分子筛晶胞尺寸、Brunauer-Emmett-Teller比表面积和孔体积等结果表明，高温硫化、焙烧、草酸洗涤等苛刻的金属毒物脱除条件破坏了催化剂的结构，虽然脱除了大量金属毒物，但并不能使催化剂再生。在Davison循环提升管（DCR）中对Demet IV再生的催化剂进行了测试，结果表明转化率达到了90%以上。
Modified Demet III and Demet IV processes were studied to regenerate the spent resid fluidized catalytic cracking (RFCC) catalyst by removing metal poisons. A total of 33.1 wt % of V, 89.2 wt % of Ni, and 67.7 wt % of Fe were removed by modified Demet III, and 37.3 wt % of V was selectively removed by modified Demet IV. The results of a microactivity test (MAT) showed that the activity and selectivity of the regenerated catalysts were considerably enhanced. It was proven by the results of MAT, unit cell size of zeolite, and Brunauer−Emmett−Teller surface area and pore volume that the severe condition for the removal of poisonous metals such as sulfidation and calcination at excessively high temperature and washing with only oxalic acid caused destruction of catalyst structure and consequently did not rejuvenate the spent RFCC catalysts though lots of metal poisons were removed. The regenerated catalysts by Demet IV were tested in a Davison circulation riser (DCR), and the results showed that the conversio...