利用聚合物的性质制备X型分子筛  

Synthesis of X-type Molecular Sieves via Using Property of Ploymer

作　　者：吕逵弟 李朝圣[2] 李学斌 余林[2] 孙明[2] 余倩[2] 李永峰[2] 

机构地区：[1]广东省工程技术研究所,广州510440 [2]广东工业大学轻工化工学院,广州510006

出　　处：《材料导报》2009年第2期22-24,36,共4页Materials Reports

基　　金：广东省科技计划项目(2005B10201053);广东省高等学校自然科学研究重点项目(06Z011);广州市科技计划项目(2006J1-C0501);广东省自然科学基金团队项目(04205301)

摘　　要：以聚合物甲基纤维素作空间位阻剂合成了X型分子筛。对合成的样品进行了XRD、BET与SEM等表征。结果表明,随甲基纤维素加入量的增加,合成样品的BET、孔体积与颗粒尺寸减小,而且BET与孔体积减小幅度增大,外比表面先增大后减小,但加入甲基纤维素量过多会导致合成样品的相对结晶度下降。与常规水热法相比,加入了空间位阻剂甲基纤维素成功地限制了颗粒的生长,合成样品的相对结晶度与外比表面增大,BET、孔体积与颗粒尺寸都减小,而且15g凝胶加2.5g甲基纤维素合成的样品最好,其相对结晶度为110%,外比表面为24.3cm2/g,BET为600.9cm2/g,孔体积为0.255cm3/g,平均颗粒尺寸为1.5μm,是常规水热法合成样品平均粒径的1/4。X-type molecular sieves are synthesized by using polymer methylcellulose as a space-confined additive. The as-synthesized products are characterized by XRD, BET and SEM, respectively. The results show the BET, micropore volume and particle size of as-synthesized samples decrease, and the reducing amplitude of BET and micro- pore volume increases, the external surface area of samples increases first and then decreases, when the content of methylcellulose increases. However, the excessive content of methylcellulose results in the decrease of relative crystal- linity of samples. Compared with the conventional hydrothermal method, adding the space-confined additive（methyl- cellulose） limits successfully the growth of particles, the relative crystallinity and external surface area of the as-syn- thesized samples increase and the BET, micropore volume and particle size decrease. The as-synthesized sample from adding 2. 5g methylcellulose into 15g colloidal is best. Its relative crystallinity is 110%, external surface area is 24. 3cm2/g, BET is 600. 9cm2/g, micropore volume is 0. 255cm3/g, and average particle size is 1.5μm, which is 1/4 average particle size of sample synthesized by the conventional hydrothermal method.

关 键 词：空间位阻剂 甲基纤维素 X型分子筛 

分 类 号：TQ424.25[化学工程] TE357.46[石油与天然气工程—油气田开发工程]