catalyst before and after deactivation
catalyst before and after deactivation
催化剂失活前后对比
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Little difference in the activity was observed before and after regeneration, which means that coke formation was the major reason of catalyst deactivation.
再生后催化剂活性与新鲜催化剂相差无几，说明主要是由于积炭而导致失活。
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