摘要
以临安钠基蒙脱土为原料,制备了铁交联和铁镧复合交联蒙脱土催化剂,利用物理吸附(BET)、扫描电镜(SEM)和X-射线衍射(XRD)对催化剂进行表征,并以铁镧复合交联蒙脱土(Fe/La-PILC)为催化剂,质量分数为30%的过氧化氢水溶液为氧化剂,考察反应时间、催化剂用量和过氧化氢用量对苯甲醇催化氧化制苯甲醛的影响。结果表明:铁镧复合交联蒙脱土形成了比较均一的中孔骨架结构;当苯甲醇与过氧化氢物质的量之比为1:2,Fe/La(200)-PILC(Fe与La物质的量之比为200)质量分数为4%,反应5 h时,苯甲醇转化率和苯甲醛选择性分别为62.1%和86.4%。研究铁镧交联蒙脱土催化剂的催化氧化机理,发现Fe/La-PILC催化氧化苯甲醇的活性氧来自于Fe/La-PILC所吸附的氧。
The Fe-linked montmorillonite （Fe-PILC） and Fe/La-cross-linked montmorillonite （Fe/La-PILC） catalysts were synthesized from Linran Na-Mont. And the catalysts were characterized by means of N2-physisorption （BET）, scanning electron microscope （SEM） and X-ray diffraction （XRD）. The oxidation of benzyl alcohol with H2O2 （mass fraction 30%） to benzaldehyde was carried out. The results showed that the framework fabric of homogeneous mesopores was formed in the cross-linked montmorillonite. And the conversion of benzyl alcohol and the selectivity of benzaldehyde reached 62.1% and 86.4%, respectively, under the conditions of molar ratio of alcohol to hydrogen peroxide 1 ： 2, mass fraction of Fe/La（200）-PILC 4% and reaction time 5 h. The active oxygen species in the reaction is the absorbed oxygen of Fe/La-PILC.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2009年第4期306-310,共5页
Chemical Reaction Engineering and Technology
基金
黑龙江省自然科学基金(E200530)
黑龙江省科技攻关计划资助项目(2004G0332-00)
关键词
铁镧复合交联蒙脱土
苯甲醇
苯甲醛
催化氧化
Fe/La-cross-linked montmorillonite
benzyl alcohol
benzaldehyde
catalytic oxidation
