【摘要】：以SiO_2/Al_2O_3物質(zhì)的量比為50的HZSM-5分子篩為原粉,經(jīng)過(guò)一定濃度的NaOH溶液處理后再使用檸檬酸溶液進(jìn)行酸洗以制備微孔-介孔多級(jí)孔HZSM-5催化劑,并研究其在模擬油中的噻吩烷基化反應(yīng)性能。結(jié)果表明,使用檸檬酸溶液進(jìn)行酸洗可以清除堿處理后孔道內(nèi)殘余的雜質(zhì)。當(dāng)檸檬酸溶液濃度為0.5 mol/L時(shí),此時(shí)得到的HZ(AC-0.5)催化劑具有適宜的孔徑和酸性,因而噻吩烷基化轉(zhuǎn)化率最高,達(dá)到95.6%。在HZ(AC-0.5)催化劑上以苯并噻吩作為噻吩衍生物模型化合物,異戊二烯作為烯烴模型化合物,苯作為芳烴模型化合物,分別考察噻吩烷基化反應(yīng)性能,并分析不同組分的模擬油對(duì)噻吩烷基化反應(yīng)轉(zhuǎn)化率和選擇性的影響。結(jié)果表明,噻吩烷基化的最佳反應(yīng)溫度是120℃,在該溫度下苯并噻吩烷基化的轉(zhuǎn)化率高于噻吩烷基化的轉(zhuǎn)化率,當(dāng)異戊二烯作為烯烴模型化合物后噻吩的轉(zhuǎn)化率會(huì)升高,當(dāng)苯作為芳烴模型化合物后噻吩的轉(zhuǎn)化率會(huì)降低。
[Abstract]:The microporous mesoporous multiporous HZSM-5 catalyst was prepared by acid pickling with citric acid solution after treatment of HZSM-5 molecular sieve with the ratio of SiO_2/Al_2O_3 material to 50 as raw powder after a certain concentration of NaOH solution. The alkylation of thiophene in simulated oil was studied. The results show that acid pickling with citric acid solution can remove the residual impurities in the pores after alkali treatment. When the concentration of citric acid solution is 0.5 mol/L, the HZ (AC-0.5) catalyst has the appropriate pore size and acidity, thus the conversion of thiophene alkylation is the highest, up to 95.6. The alkylation properties of thiophene were investigated on HZ (AC-0.5) catalyst using benzothiophene as a thiophene derivative model compound isoprene as an olefin model compound and benzene as a aromatics model compound. The effects of simulated oil of different components on the conversion and selectivity of thiophene alkylation were analyzed. The results show that the optimum reaction temperature for thiophene alkylation is 120 鈩，

本文編號(hào)：2392603