Cracking catalysts sintering treatments

Deactivated catalysts are reused after adequate regeneration processes either on-site or off-site, when possible and economical. Important examples are catalytic cracking (FCC), naphtha-reforming and HDS catalysts. The generation process to be employed differs depending on the kind of catalyst and cause of deactivation. In general carbon deposits are burnt off by air and metal deposits are removed by chemical treatment such as washing with sulfuric acid. Redispersion of sintered metal particles on support is sometimes possible. 

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