Acidic chitosan membrane as an efficient catalyst for biodiesel production from oleic acid
Acidic chitosan membrane as an efficient catalyst for biodiesel production from oleic acid
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DOI：
10.1016/j.renene.2019.05.101
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发表时间：
2019-12
期刊：
影响因子：
8.7
通讯作者：
N. Saengprachum;Dongren Cai;Mantian Li;Ling Li;Xiaocheng Lin;T. Qiu
中科院分区：
文献类型：
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作者：
N. Saengprachum;Dongren Cai;Mantian Li;Ling Li;Xiaocheng Lin;T. Qiu
通过壳聚糖和磺基琥珀酸（SSA）的交联，制备酸性壳聚糖膜（ACM），用于油酸和甲醇的酯化生产生物柴油。应用 ATR-FTIR、TGA、XRD、SEM 和 EDX 对制备的 ACM 进行表征。研究了所制备的 ACM 的酸性位点密度和溶胀能力。 ACM具有4.62mmol/g的酸性位点密度，略低于Amberlyst-15的4.76mmol/g，同时ACM的溶胀能力远高于Amberlyst-15。在相同反应下，转化率可达98.76%，而Amberlyst-15仅达到44.30%。工艺变量的优化采用单因素实验和Box-Behnken设计（BBD）响应面法相结合的方式进行。还研究了 ACM 在不同脂肪酸和醇酯化反应中的催化活性。阐明了ACM催化酯化反应的催化机理。根据催化机理，建立了酯化反应的动力学模型，得到了相关的动力学参数（Ea+、Ea−、A+和A-），同时与不同催化剂下的同一反应的动力学结果进行了详细比较。此外，还对所制备的ACM的重复使用性进行了研究。
Via the crosslinking of chitosan and sulfosuccinic acid (SSA), the acidic chitosan membrane (ACM) was prepared for biodiesel production from esterification of oleic acid and methanol. ATR-FTIR, TGA, XRD, SEM and EDX were applied to characterize the prepared ACM. The acidic site density and swelling capacity of the prepared ACM were investigated. The ACM possessed the 4.62 mmol/g of acidic site density, which was just a little less than 4.76 mmol/g of Amberlyst-15, meanwhile, ACM was proven to be much higher than Amberlyst-15 in swelling capacity. Under the same reaction, the 98.76% of conversion can be obtained while the Amberlyst-15 only reached 44.30%. The optimization of process variables was conducted by the combination of single factor experiment and Box-Behnken design (BBD) response surface methodology. The catalytic activity of ACM in different esterification of fatty acids and alcohols was also investigated. And the catalytic mechanism of esterification catalyzed by ACM was clarified. Based on the catalytic mechanism, the kinetic model was established to describe the esterification and obtain relevant kinetic parameters (Ea+,Ea−,A+andA-), meanwhile, the kinetic results were compared to the same reaction with different catalysts in detail. Besides, the reusability of the prepared ACM was studied.