固体聚合物电解质大豆油氢化反应器中膜电极制备条件的研究

Preparation of Membrane-Electrode-Assembly Used in a Solid Polymer Electrolyte Reactor for the Hydrogenation of Soybean Oil

利用固体聚合物电解质氢化反应器,在60℃和常压条件下氢化大豆油。对固体聚合物电解质氢化反应器的核心关键部件膜电极的制备条件进行了优化研究。膜电极最佳制备条件为使用RuO_2为阳极催化剂,40%Pt/C为阴极催化剂,催化剂的载量均为0.6 mg/cm^2,其中阳极和阴极黏合剂占催化层总质量的30%,膜电极最佳热压压力为2 MPa。利用优化条件下制备的膜电极获得了碘值为110 g I/100 g油、反式脂肪酸仅为1.55%的氢化大豆油。

Soybean oil was electrochemically hydrogenated in a solid polymer electrolyte （SPE） reactor at 60 ℃. Preparation conditions of membrane - electrode - assembly as the key part of the SPE reactor were optimized in this study. The optimized conditions were that the RuO2 was used as anode catalyst, Pt/C was used as cathode cata- lyst, and the catalyst loading of both cathode and anode were 0.6 mg/cm2, of which the anode and cathode binder content account for 30% of the total mass of catalyst layer, and the optimum membrane - electrode assembly hot - pressing condition was at 2 MPa. Under the optimal preparation conditions of the membrane electrode, the hydrogenated soybean oil with the iodine value 110 gI/100 g was obtained, in which the content of trans fatty acids was only 1.55%.