高校化学工程学报Issue(4)：615-621,7.DOI:10.3969/j.issn.1003-9015.2013.04.012
PW/介孔 Hβ沸石催化合成金刚烷的研究
Preparation of Adamantane over PW/meso-HβZeolite Catalyst
摘要
Abstract
Desilicated mesoporous Hβ zeolite was prepared through treating Hβ zeolite including template tetraethylammonium hydroxide (TEAOH) with NaOH aqueous solution. 12-Tungstophosphoric acid (PW) was immobilized on the desilicated mesoporous Hβzeolite at room temperature to form the PW/meso-Hβcatalysts. The physical and chemical properties of the PW/meso-Hβ catalysts were characterized by X-ray diffraction (XRD), liquid N2 adsorption-desorption and temperature programmed desorption of ammonia (NH3-TPD), respectively; and the catalytic performances of the prepared PW/meso-Hβ catalysts were investigated by catalyzing the isomerization reaction of endo-tetrahydrodicyclotadiene (endo-TCD) to form adamantane (ADH) in a 100 mL batch stainless-steel autoclave with stirring. The results show that the loaded PW could still be highly dispersed on the surface of the desilicated mesoporous Hβzeolite when the PW loading is 30%, and the 30%PW/meso-Hβcatalyst has the largest acid amount. When using 30%PW/meso-Hβzeolite as catalyst, 99.4%conversion of endo-TCD can be obtained under the following conditions: reaction temperature of 240℃, the catalyst to endo-TCD mass ratio of 0.6 and reaction time of 5 h. In comparison with PW/Hβcatalyst, the yield of ADH increases from 22.4%to 32.7%because of the presence of mesopores in the desilicated Hβzeolite. The catalytic activity of used catalyst can be recovered and the yield of ADH can still reach 28.7%after 6 times reuse.关键词
金刚烷/异构化/磷钨酸/介孔 Hβ 沸石Key words
adamantane/isomerization/12-tungstophosphoric acid/mesoporous Hβzeolite分类
化学化工引用本文复制引用
周志伟,秦娟,王巍,武文良..PW/介孔 Hβ沸石催化合成金刚烷的研究[J].高校化学工程学报,2013,(4):615-621,7.基金项目
江苏省自然科学基金资助项目(BK2008376)。 （BK2008376）
