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在水-有机溶剂复合体系中,以P123为结构导向剂水热直接合成了锆掺杂介孔固体酸催化剂(Zr-PHTS),运用XRD、TEM、N2吸附-脱附以及NH3-TPD、Py-FTIR等手段对催化剂进行了表征.结果表明,在硅锆摩尔比20-100考察范围内,所得Zr-PHTS样品均显示有序二维六方晶相结构,具有以L酸为主的中等强度的酸性中心;随着锆引入量的变化Zr-PHTS的比表面积仅显示少量的变化,孔径维持在9.8 nm;在四氢呋喃聚合反应中Zr-PHTS显示出较好的催化活性,硅锆摩尔比30的样品表现出最佳的催化性能,聚合物收率达到40.4%,数均分子量2 135,推测催化剂表面酸性和孔结构决定了催化剂对四氢呋喃的聚合性能.
Zirconium doped mesoporous solid acid catalyst (Zr-PHTS) was synthesized by hydrothermal method using P123 as directing agent in water-organic solvent composite system. XRD, TEM, N2 adsorption-desorption and NH3- -FTIR were used to characterize the catalysts.The results showed that the Zr-PHTS samples showed an ordered two-dimensional hexagonal phase structure with an L-acid-based medium strength With the Zr-PHTS specific surface area showing only a small amount of change, the pore size maintained at 9.8 nm; Zr-PHTS showed good catalytic activity in the polymerization of tetrahydrofuran, the molar ratio of silicon to zirconium 30 Of the samples showed the best catalytic performance, the yield of the polymer reached 40.4% and the number average molecular weight of 2 135. It was speculated that the surface acidity and pore structure of the catalyst determined the polymerization performance of the catalyst for tetrahydrofuran.