【Daily Question No. 124】2018.05.04

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【Daily Question No. 124】May 04, 2018: 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: This question is valid for 48 hours; within those 48 hours, 10 wealth points are awarded for correct answers and 2 wealth points for incorrect answers ； If a response is given after 48 hours, the score is halved, regardless of whether it is correct or not ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=spaceAPP through the summary post below. The short video skill competition has begun! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670