久久无码人妻一区二区三区午夜_久久久久精品久久久久影院蜜桃_亚洲综合欧美色五月俺也去_交换娇妻呻吟声不停中文字幕

今天給大家分享的是2014年6月份 《Fuel Processing Technology》上發表的一篇名為：Aspects of Mg–Al mixed oxide activity in transesterification of rapeseed oil in a fixed-bed reactor

文章摘要如下：

The performance of Mg–Al mixed oxides prepared from different types of precursors in transesterification of rapeseed oil was studied in a fixed-bed reactor. The structure and basicity of Mg–Al–K and Mg–Al–Na mixed oxides with 3.6 Mg/Al molar ratio were compared before and after the catalytic tests carried out at various reaction temperatures (115 and 140 °C) and residence times (0.7, 1.54 and 1.79 h). The maximum ester yield of 77% was obtained at 140 °C and residence time of 1.54 h. The ester yield was stable during 50 h of the experiment. It was associated with the negligible magnesium leaching from the solid catalyst into the liquid phases and the minimum change in the composition, structure and basicity of Mg–Al mixed oxides after the catalytic test.

該文章中材料表征采用的是美國麥克儀器AutoChem 2920

詳情可參考下面鏈接：

http://www.sciencedirect。。ｃｏｍ/science/article/pii/S0378382014000381