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-NH_(2)-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=-dC_(A)/dt=3.82×10^(2)exp(-28.10/RT)C_(A)^(1.94)。
Mesoporous silicate supported phosphotungstic acid catalyst(TUD-1-NH_(2)-PW)was prepared with mesoporous silicate(TUD-1)as the carrier,through amino functionalization and phosphotungstic acid immobilization.The structure and acidity of the catalyst were characterized by XPS,XRD,TGA-DTG,BET,n-butylamine 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-NH 2-PW catalyst exhibited good catalytic activity 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 conditions,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=-d C_(A)/d t=3.82×10^(2)exp(-28.10/RT)C_(A)^(1.94).
作者
蒋胜筹
王婕
曾智炜
郏俊浩
任佳益
端木佳辉
汪思田
韩晓祥
Jiang Shengchou;Wang Jie;Zeng Zhiwei;Jia Junhao;Ren Jiayi;Duanmu Jiahui;Wang Sitian;Han Xiaoxiang(School of Food Science and Biotechnology,Zhejiang Gongshang University,Hangzhou 310018)
出处
《中国粮油学报》
CAS
CSCD
北大核心
2024年第2期149-156,共8页
Journal of the Chinese Cereals and Oils Association
基金
浙江工商大学研究生科研创新基金项目(EDZD202206)。
关键词
生物柴油
磷钨酸
响应面法
动力学研究
biodiesel
phosphotungstic acid
response surface methodology
kinetic study
作者简介
第一作者:蒋胜筹,女,1998年出生,硕士,食品科学与工程,934909045@qq.com;通信作者:韩晓祥,男,1974年出生,教授,食品化学,hxx74@126.com。
