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songjianguo银虫 (小有名气)
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[求助]
几句英文翻译，求帮助
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In general, the trans-esterification is base catalyzed while the esterification is catalyzed by acids, although alternative acid/base catalysts could be used but at prohibitive reaction rates. The FAME synthesis stage is followed by several neutralization and purification steps. Nonetheless, all conventional methods suffer from problems associated with the use of homogeneous catalysts, leading to severe economical and environmental penalties. Thishas to change in view of the large growth worldwide in biodiesel production. |
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已经解决 2楼2013-11-22 16:31:26
