A proper amount of catalyst will speed up the reaction.

添加适量的催化剂，会加快反应的速度。

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Excessive amount of catalyst, the temperature is too high or lead to severe coking.

催化剂用量过多，或者温度过高导致结焦严重。

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Excessive amount of catalyst, the temperature is too high or lead to severe coking.

催化剂用量过多，或者温度过高导致结焦严重。

youdao