【Daily Question Question 319】2017.12.03

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【Daily Question No. 319】December 03, 2017: Which of the following is NOT a cause of catalyst deactivation? A. Coking and carbon deposition on the catalyst surface; B. Excess moisture content in the raw materials; C. The product of metals and ash on the catalyst; D. Metal aggregation and changes in crystal size and shape. B (Unless otherwise specified, all questions and answers are based on hydrogenation units. ) For management purposes, if you need to view content from a few days ago, please go through the summary post below. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html (Source: Haichuan Chemical Industry Forum)