摘要
在十六烷基三甲基溴化铵存在下,在浓NaOH溶液中降解并再晶化FER沸石,得到单一有序的介孔分子筛.通过X射线衍射(XRD),傅里叶变换红外光谱(FT-IR),热重(DTG),N2吸附,NH3程序升温脱附(NH3-TPD)及水热处理等手段对合成样品的结构性能进行了详细表征,并以混合C4烃催化裂解制低碳烯烃作为探针反应考察了合成样品的催化性能.结果表明,本方法合成的样品ReFM为孔壁含FER沸石次级结构单元的高度有序的介孔材料,其具有合适的孔道和适中的酸性,在625℃混合C4烃催化裂解反应中表现出52.29%的烯烃收率.
The mesoporous molecular sieve with the structure of MCM-41 was prepared by recrystallization of FER zeolite in thicker NaOH solution in the presence of cetyl trimethyl ammonium bromide. The mesoporous materials were characterized by X-ray diffraction （ XRD）, Fourier transform-infrared spectroscopy （ FT-IR）, thermogravimettic analysis （ DTG）, N2 adsorption, temperature programmed desorption of NH3 （ NH3-TPD ） and hydrothermal treatment methods. Catalytic performances of samples were investigated using catalytic cracking of C4 hydrocarbons to light olefins as probe reaction. The results indicate that the synthesized sample ReFM has ordered hexagonal structure with FER zeolite secondary units in its pore walls. And because of proper pore diameter and acid properties, the synthesized material ReFM obtained 52.29% of light olefins yield at 625 ℃ in catalytic cracking of C4 hy- drocarbons reaction.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2011年第5期400-405,共6页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金资助项目(20973123)
太原科技大学校青年基金(2007111)
关键词
FER沸石
次级结构单元
再晶化
介孔分子筛
C4烃
FER zeolite
secondary units
recrystallization
mesoporous molecular sieves
C4 hydrocarbons
