Transesterifications using a hydrocalumite synthesized from waste slag: an economical and ecological route for biofuel production
Transesterifications using a hydrocalumite synthesized from waste slag: an economical and ecological route for biofuel production
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DOI：
10.1039/c2cy20113e
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发表时间：
2012-08
影响因子：
5
通讯作者：
Yasutaka Kuwahara;K. Tsuji;T. Ohmichi;T. Kamegawa;K. Mori;H. Yamashita
中科院分区：
文献类型：
--
作者：
Yasutaka Kuwahara;K. Tsuji;T. Ohmichi;T. Kamegawa;K. Mori;H. Yamashita
以高炉矿渣（BFS）为原料制备水铝钙石（Hydrocalumite），并将其应用于酯（包括甘油三酯）的转化反应。在正丁酸乙酯酯交换反应中，煅烧样品的催化活性高于合成水铝钙石，这是由于炉渣中Fe、Mn等杂质元素作为催化助剂的作用。此外，在800 °C下在空气中煅烧的催化剂用作大豆油与甲醇的酯交换的有效催化剂，在相对温和的反应条件（即，甲醇/大豆油= 12，反应温度= 60 °C，使用lwt %催化剂），并且其催化性能甚至在空气暴露1天后也重现。研究结果表明，炉渣法水铝钙石可以替代现有的固体碱催化剂，作为一种低成本的生物柴油生产替代品，为生物柴油生产过程的可持续发展做出贡献。
Blast furnace slag (BFS), a high volume byproduct resulting from iron-making processes, was used as a low-cost and abundant precursor for preparing a hydrocalumite, and the thus prepared slag-made hydrocalumite and its derivatives were applied for transesterifications of esters including triglycerides. In the transesterification of n-ethyl butyrate, calcined samples provided higher catalytic activities than those of the as-synthesized hydrocalumite due to the interfusion of slag-derived impurity elements, such as Fe and Mn, which act as catalyst promoters. Furthermore, the catalyst calcined at 800 °C in air worked as an efficient catalyst for the transesterification of soybean oil with methanol, affording up to 97% yield of fatty acid methyl esters (FAME) after 6 h under relatively moderate reaction conditions (i.e., methanol/soybean oil = 12, reaction temperature = 60 °C, use of 1 wt% catalyst), and its catalytic performance was reproduced even after air-exposure for 1 day. It is believed that the slag-made hydrocalumite can replace existing solid base catalysts as a low-cost alternative for biodiesel production and potentially contribute to the sustainable chemical processes in an economical and ecological way.