要加快反应速度就得使用催化剂。
酯交换是油脂改性主要方法之一，使用催化剂可降低反应温度，加快反应速度。
Transesterification is one of main methods of oil modification. Catalysts are used to decrease reaction temperature, accelerate reaction velocity.
介绍了聚苯乙烯的催化降解，并得出了使用催化剂不同，降解产品也不同的结论。
It mainly introduced the catalytic degradation of polystyrene and drew a conclusion that degradation products vary with different catalysts.
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