亚洲va中文字幕欧美不卡-亚洲va在线va天堂成人-亚洲va在线va天堂va手机-亚洲va在线va天堂va888www-国产精品扒开腿做爽爽爽王者A片-国产精品白浆一区二小说

    今天給大家分享的是2014年7月份 《Catalysis Communications》上發(fā)表的一篇名為：Basicity–FAME yield correlations in metal cation modified MgAl mixed oxides for biodiesel synthesis
文章摘要如下：
In this paper Zn2 +, Co2 +, Fe3 + and La3 + were respectively introduced into Mg3Al1 mixed oxides to prepare Mg1Zn2Al1, Mg1Co2Al1, Mg3Al0.6Fe0.4 and Mg3Al0.6La0.4 oxides by calcinations at 773 K. The XRD, XPS, BET, ICP-AES and CO2-TPD characterizations of samples exhibited that the effects of the substitution of trivalent cations (Fe3 +, La3 +) for Al3 + on the basicity of samples were stronger than the substitution of divalent cations (Zn2 +, Co2 +) for Mg2 + because of high O2 − concentration which were coincident with the FAME yield for these catalysts. La3 + modified catalyst exhibited highest activity in transesterification.
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/S1566736714001174