质子酸

fēn zǐ shāi biǎo miàn zhì zǐ suān zhōng xīn zài fǎn yìng guò chéng zhōng qǐ le zhòng yào zuò yòng

分子筛表面质子酸中心在反应过程中起了重要作用。

The bronsted acid centres on the catalyst surface play an important role in the reaction.