Preparation and characterization of PSSA/PVA catalytic membrane for biodiesel production
Preparation and characterization of PSSA/PVA catalytic membrane for biodiesel production
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DOI：
10.1016/j.fuel.2010.02.001
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发表时间：
2010-09
期刊：
影响因子：
7.4
通讯作者：
Mulan Zhu;Benqiao He;Wenying Shi;Yaohui Feng;Jincheng Ding;Jianxin Li;F. Zeng
中科院分区：
文献类型：
--
作者：
Mulan Zhu;Benqiao He;Wenying Shi;Yaohui Feng;Jincheng Ding;Jianxin Li;F. Zeng
采用溶液浇铸法制备了聚苯乙烯磺酸（PSSA）/聚乙烯醇（PVA）共混膜，并将其作为非均相酸催化剂，催化地沟油酸性油脂制备生物柴油。为了提高膜的稳定性，在不同温度下对膜进行退火处理。采用傅里叶变换红外光谱（FTIR）、热重分析（TG）、X射线衍射（XRD）等手段对膜的结构和性能进行了研究。研究发现，当热处理温度高于80°C时，PVA和PSSA链之间形成交联结构。随着退火温度从室温（对于未处理的膜）增加到150°C，由于交联结构的形成，PSSA在甲醇/水溶剂中的共混膜中的保留从50%显著增加到85%。对酸性油脂酯化反应的研究结果表明，在一定的PSSA含量下，膜中PVA的含量对酯化率的影响不大。催化膜的厚度对最终转化率没有显著影响。在120°C下退火的膜在膜中表现出最好的催化性能，在运行中具有80%的稳定转化率。
Poly(styrene sulfonic acid) (PSSA)/Poly(vinyl alcohol) (PVA) blend membranes prepared by the solution casting were employed as heterogeneous acid catalysts for biodiesel production from acidic oil obtained from waste cooking oil (WCO). The membranes were annealed at different temperature in order to enhance their stability. The structure and properties of the membranes were investigated by means of Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), X-ray diffraction (XRD). It is found that the crosslinking structure among PVA and PSSA chains formed when the thermal treatment temperature was higher than 80°C. The retention of PSSA in the blend membranes in the methanol/water solvent was markedly increased from 50% to 85% with the increase of the annealing temperature from room temperature (for the untreated membrane) to 150°C due to the formation of the crosslinking structure. The results of esterification of acidic oil show that the conversion was slightly improve with the PVA content in the membrane at a fixed PSSA content. The thickness of the catalytic membrane had no significant effect on the conversion in the end. The membrane annealed at 120°C exhibited the best catalytic performance among the membranes, with a stable conversion of 80% with the runs.