无模板剂合成ZSM-5分子筛及其催化性能  

Synthesis of ZSM-5 Zeolite by Template-Free Method

作　　者：江永军[1] 张堃[1] 赵天生[2] 雍晓静[1] 罗春桃[1] 

机构地区：[1]神华宁夏煤业集团有限责任公司煤炭化学工业分公司研发中心,宁夏银川750411 [2]宁夏大学能源化工自治区重点实验室,宁夏银川750021

出　　处：《化学反应工程与工艺》2014年第6期528-535,共8页Chemical Reaction Engineering and Technology

摘　　要：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%。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%.

关 键 词：无模板剂 ZSM-5 分子筛 水热合成 性能表征 

分 类 号：O643.322[理学—物理化学] TQ426.6[理学—化学]