CAJ | 학술논문

采用水热合成法制备了无模板剂ZSM-5分子筛，考察了制备工艺对无模板剂ZSM-5分子筛结构的影响，并用X-射线衍射（XRD）、扫描电子显微镜（SEM）、NH3程序升温脱附（NH3-TPD）、傅立叶变换-红外光谱（FT-IR）和 N2低温吸附（BET）等方法对合成产物的物相、形貌和酸性等进行了表征。结果表明，在140℃晶化24 h，可制得性能较好的无模板剂ZSM-5分子筛，其相对结晶度为151%，具有较大的比表面积、适中的酸强度和较高的热稳定性，在催化甲醇制丙烯（MTP）单程反应中，甲醇转化率为100%，丙烯选择性为39.5%。
채용수열합성법제비료무모판제ZSM-5분자사，고찰료제비공예대무모판제ZSM-5분자사결구적영향，병용X-사선연사（XRD）、소묘전자현미경（SEM）、NH3정서승온탈부（NH3-TPD）、부립협변환-홍외광보（FT-IR）화 N2저온흡부（BET）등방법대합성산물적물상、형모화산성등진행료표정。결과표명，재140℃정화24 h，가제득성능교호적무모판제ZSM-5분자사，기상대결정도위151%，구유교대적비표면적、괄중적산강도화교고적열은정성，재최화갑순제병희（MTP）단정반응중，갑순전화솔위100%，병희선택성위39.5%。
ZSM-5 zeolite was prepared by template-free hydrothermal synthesis method. The samples were characterized by NH3 temperature programmed desorption(NH3-TPD), Fourier infrared spectroscopy (FT-IR), X-ray diffraction(XRD), scanning electron microscopy(SEM) and low-temperature nitrogen adsorption-desorption technique(BET). The effects of process conditions on the structure and performance of ZSM-5 molecular sieves were investigated. The results showed that under the optimum process conditions of adding crystal seed 1% and crystallization time 24 h at 140℃, the relative crystallinity, crystal particle size and specific surface area of ZSM-5 zeolite product were 151%, 150 nm and 447.8 m2/g, respectively. When the ZSM-5 zeolite synthesized was applied to methanol to propylene(MTP) reaction under typical conditions, the conversion of methanol was 100%, the selectivity of propylene reached 39.5%.