磷脂酰胆碱的多相催化酯交换反应。
Heterogeneous catalytic transesterification of phosphatidylcholine.
机构信息
Division of Environmental Science and Engineering, National University of Singapore, Singapore 117576, Singapore.
出版信息
Bioresour Technol. 2011 Jan;102(2):1942-6. doi: 10.1016/j.biortech.2010.08.040. Epub 2010 Aug 16.
The transesterification of phosphatidylcholine (PC) via homogeneous and heterogeneous catalysis was investigated for the production of fatty acid methyl esters (FAME) i.e. biodiesel. Calcium methoxide and calcium oxide were used as heterogeneous catalysts, and KOH as a homogeneous catalyst for the transesterification of phosphatidylcholine (PC)--a polar phospholipid prevalent in eukaryotic organisms. The initial reaction rate was higher for KOH (24.23 g of FAME/g of catalyst.min) than for calcium methoxide (17.06 g of FAME/g of catalyst.min) and calcium oxide (1.06 g of FAME/g of catalyst.min). PC was then mixed with soybean oil at different proportions (i.e. 10%, 30% and 50%, PC10, PC30 and PC50, respectively) which was then used as the feedstock for transesterification using calcium methoxide. When the mass fraction of PC was increased in the feedstock reaction rate also increased. Phosphorus content of the FAME layer of PC100, PC50, PC30 and PC10 was 0.081, 0.041, 0.035 and 0.028% (w/w), respectively.
通过均相和非均相催化研究了磷脂酰胆碱（PC）的酯交换反应，以生产脂肪酸甲酯（FAME），即生物柴油。甲醇钙和氧化钙用作非均相催化剂，氢氧化钾用作均相催化剂，用于磷脂酰胆碱（PC）的酯交换反应，PC 是真核生物中普遍存在的一种极性磷脂。KOH 的初始反应速率更高（24.23 g FAME/g 催化剂.min），而甲醇钙的初始反应速率较低（17.06 g FAME/g 催化剂.min），氧化钙的初始反应速率更低（1.06 g FAME/g 催化剂.min）。然后将 PC 与大豆油以不同的比例（即 10%、30%和 50%，分别为 PC10、PC30 和 PC50）混合，然后用甲醇钙作为原料进行酯交换反应。当进料中 PC 的质量分数增加时，反应速率也随之增加。PC100、PC50、PC30 和 PC10 的 FAME 层中的磷含量分别为 0.081%、0.041%、0.035%和 0.028%（w/w）。
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