Operational changes fix FCCU catalyst loss problem

After experiencing a huge catalyst loss while bringing up one of its fluid catalytic cracking units (FCCUs), Sinopec's Shijiazhuang, China, refinery detected and isolated five leaking clusters from its FCCU external cooler.The company successfully used a safer and quicker procedure, different from its traditional methods, to detect these leaking clusters.Investigation revealed that improper maintenance during a long period of feed outage for the FCCU and improper operations were the main causes of the leaks.Based on its experience, the Sinopec refinery has developed new procedures to isolate and repair leaking clusters. It has also developed recommendations to minimize the possibility...

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