ZrO2多晶泡沫陶瓷催化剂管式反应器催化合成生物柴油

以泡沫陶瓷研究方法和制备技术合成ZrO2多晶泡沫陶瓷催化剂，利用XRD、SEM、Py-IR和BET等手段对其晶体结构进行表征。研究了ZrO2多晶泡沫陶瓷催化剂管式反应器催化光皮树油和甲醇制备生物柴油的工艺，对影响酯交换活性的反应温度、反应压力和醇油摩尔比三个因素进行考察，并采用响应面法优化了条件，结果发现，该反应的最适反应温度、反应压力、醇油摩尔比分别为 290 ℃、10 MPa、4:1，此条件下产物中脂肪酸甲酯含量为98.38%。ZrO2多晶泡沫陶瓷催化剂管式反应器催化水分含量7.1%，酸值130.697 mgKOH/g的原料油，产物中脂肪酸甲酯含量仍能达到93%和97.67%。未更换催化剂的条件下连续反应10批次（每批次使用12小时），仍能保持产物中脂肪酸甲酯含量为97%，可见ZrO2多晶泡沫陶瓷催化剂是一种耐酸、耐水，高效、稳定的固体催化剂。

Synthesis of biodiesel using ZrO2 polycrystalline ceramic foam catalyst in a tubular reactor

With the help of the ceramic foam research efforts and preparation techniques, the ZrO2 polycrystalline ceramic foam catalyst was synthesized, and its characteristics, including the crystal structure, the phase composition, the acid–base properties, and the microstructure, were analyzed by XRD, SEM, Py-IR, and BET techniques. The performance of the ZrO2 polycrystalline ceramic foam catalyst in a tubular reactor was investigated via biodiesel synthesis using S. wilsoniana oil and methanol. The effects of reaction conditions (i.e., reaction temperature, reaction pressure, and volume ratio of methanol to S. wilsoniana oil) on transesterification efficiency were investigated, and the reaction conditions were optimized using RSM. The optimum reaction temperature, reaction pressure, and volume ratio of methanol to S. wilsoniana oil were determined to be 290 °C, 10 MPa, and 4:1, respectively. Under this condition, the FAME content in the product oil reached 98.38%. The performance of the ZrO2 polycrystalline ceramic foam catalyst synthesized in this work for biodiesel synthesis from S. wilsoniana oil with a moisture content of 7.1% and an acid value of 130.697 mg KOH/g was examined, and the FAME content in the product oil was found to be 93% and 97.67%, respectively. The FAME content in the product oil exceeded 97% after five consecutive cycles (12 h per cycle of use) of the catalyst. The proposed catalyst represents a new type of solid catalyst with excellent acid resistance, water resistance, esterification efficiency, and catalytic stability.