氨基功能化硅酸盐固载磷钨酸催化制备生物柴油及动力学研究
Preparation of Biodiesel Catalyzed by Phosphotungstic Acid Supported on Amino Functionalized Silicate and Its Kinetics
蒋胜筹 1王婕 1曾智炜 1郏俊浩 1任佳益 1端木佳辉 1汪思田 1韩晓祥1
作者信息
- 1. 浙江工商大学食品与生物工程学院,杭州 310018
- 折叠
摘要
以介孔硅酸盐(TUD-1)为载体,经氨基功能化、磷钨酸固载化制备介孔硅酸盐固载磷钨酸催化剂(TUD-1-NH2-PW),并利用XPS、XRD、TGA-DTG、BET、正丁胺电位滴定法等技术手段与方式对催化剂的结构和酸性进行表征,同时考察该催化剂在催化棕榈酸与乙醇酯化制备生物柴油反应中的催化性能.研究结果表明,TUD-1-NH2-PW催化剂具有较好的催化酯化活性和稳定性.利用响应面分析法优化所得生物柴油的产率为96.86％,结果与模型预测值基本符合.优化条件下,合成生物柴油的反应级数为1.94,表观活化能为 28.10 kJ/mol,动力学方程为:r=-dCA/dt=3.82 × 102exp(-28.10/RT)CA1.94.
Abstract
Mesoporous silicate supported phosphotungstic acid catalyst(TUD-1-NH2-PW)was prepared with mesoporous silicate(TUD-1)as the carrier,through amino functionalization and phosphotungstic acid immobi-lization.The structure and acidity of the catalyst were characterized by XPS,XRD,TGA-DTG,BET,n-butyl-amine potentiometric titration,and the catalytic performance in the esterification of palmitic acid with ethanol to biodiesel was investigated.The results indicated that the TUD-1-NH2-PW catalyst exhibited good catalytic activi-ty and stability in this esterification process.In addition,the optimized yield of ethyl palmitate obtained by response surface methodology(RSM)was 96.86％,complying with the experimental results.Under optimal reaction condi-tions,the reaction order was 1.94,the active energy of ethyl palmitate synthesis reaction was 28.10 kJ/mol,and the kinetic equation could be expressed as:r=dCA/dt-=3.82 × 102exp(-28.10/RT)CA1.94.
关键词
生物柴油/磷钨酸/响应面法/动力学研究Key words
biodiesel/phosphotungstic acid/response surface methodology/kinetic study引用本文复制引用
基金项目
浙江工商大学研究生科研创新基金项目(EDZD202206)
出版年
2024
NETL
NSTL
万方数据