Biodiesel production from transesterification of palm oil with methanol over CaO supported on bimodal meso-macroporous silica catalyst.
Biodiesel production from transesterification of palm oil with methanol over CaO supported on bimodal meso-macroporous silica catalyst.
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DOI：
10.1016/j.biortech.2014.01.076
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发表时间：
2014-03
影响因子：
11.4
通讯作者：
Thongthai Witoon;Sittisut Bumrungsalee;Peerawut Vathavanichkul;Supaphorn Palitsakun;Maythee Saisriyoot;K. F
中科院分区：
文献类型：
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作者：
Thongthai Witoon;Sittisut Bumrungsalee;Peerawut Vathavanichkul;Supaphorn Palitsakun;Maythee Saisriyoot;K. F
负载氧化钙的多孔材料已显示出作为酯交换催化剂的前景。然而，通过孔隙的大体积甘油三酯的缓慢扩散限制了氧化钙（CaO）的活性。在这项工作中，双峰介孔-大孔二氧化硅被用作载体，以提高分散在孔内的CaO的可及性。为了比较的目的，采用了具有相同中孔直径的单峰多孔二氧化硅。考察了CaO含量和催化剂颗粒大小对脂肪酸甲酯收率的影响。随着CaO含量的增加，基体强度增加。颗粒尺寸为325 μm的CaO负载的双峰多孔二氧化硅催化剂在第一次循环中获得了94.15的高%FAME，并且在连续5次循环后保持了88.87的优异%FAME。
Calcium oxide-loaded porous materials have shown promise as catalysts in transesterification. However, the slow diffusion of bulky triglycerides through the pores limited the activity of calcium oxide (CaO). In this work, bimodal meso-macroporous silica was used as a support to enhance the accessibility of the CaO dispersed inside the pores. Unimodal porous silica having the identical mesopore diameter was employed for the purpose of comparison. Effects of CaO content and catalyst pellet size on the yield of fatty acid methyl esters (FAME) were investigated. The basic strength was found to increase with increasing the CaO content. The CaO-loaded bimodal porous silica catalyst with the pellet size of 325 μm achieved a high %FAME of 94.15 in the first cycle, and retained an excellent %FAME of 88.87 after five consecutive cycles.