Al源种类对微乳液法制备固体超强酸催化剂异构化性能的影响  

Influence of aluminum species on the isomerization performance over solid superacid Pt-S_2O_8^(2-)/ZrO_2-Al_2O_3

作　　者：宋华[1,2] 赵乐乐[1] 宋华林[3] 李锋[2] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]东北石油大学石油与天然气化工黑龙江省重点实验室,黑龙江大庆163318 [3]牡丹江医学院黑龙江省高校肿瘤疾病防治重点实验室,黑龙江牡丹江157011

出　　处：《燃料化学学报》2015年第10期1239-1244,共6页Journal of Fuel Chemistry and Technology

基　　金：中国石油天然气股份有限公司科技风险创新研究(07-06D-01-04-03-02)资助项目~~

摘　　要：分别以拟薄水铝石、γ-Al2O3、Al2O3、Al(NO3)3·9H2O为Al源,通过微乳液法制备了一系列Pt-S2O2-8/Zr O2-Al2O3催化剂,并利用XRD、FT-IR、BET、H2-TPR等手段对其进行了表征,考察了Al源种类对Pt-S2O2-8/Zr O2-Al2O3固体超强酸催化剂结构和酸性的影响,并以正戊烷异构化反应为探针,考察了Al源种类对催化剂异构化性能的影响。结果表明,不同Al源制备的催化剂均能够稳定Zr O2四方晶相,增大催化剂的比表面积;除以拟薄水铝石为Al源制备的催化剂外,其他催化剂的氧化还原性能均有所提高。以Al(NO3)3·9H2O为Al源制备的催化剂具有最大的比表面积和更多的超强酸,表现出最佳的异构化性能,在反应压力2.0 MPa、氢烃物质的量比4∶1、质量空速(WHSV)1.0 h-1、反应温度220℃条件下,异戊烷产率达到59.5%。A series of Pt-S2028-/ZrO2-Al203 catalysts were prepared by microemulsion method with pseudo- boehmite, y-Al203, Al203 and AI（NO3 ）3 ·9H20 as aluminum source, respectively, and the resulting catalysts were characterized by XRD, FT-IR, BET, H2-TPR techniques. The influence of aluminum sources on the structure and acidic properties of the catalysts were investigated. The catalytic performance of the Pt-S2028-/ ZrOE-Al203 catalysts was studied using n-petane isomerization as a probe reaction. The results indicated that all the catalysts prepared with different source of aluminum can stabilize the tetrogonal ZrO2 phase and increase specific surface area of the catalysts. Except for pseudo-boehmite, the redox performance of catalysts prepared with other aluminum source were improved. The catalyst prepared with Al （ NO3 ） 3 · 9H20 as the aluminum source, which possessed the largest specific surface area and more superacid, exhibited the best isomerization performance. At a reaction temperature of 220℃, a pressure of 2.0 MPa, a hydrogen/hydrocarbon mol ratio of 4：1 and a WHSV of 1.0 h-1, the isopentane yield reaches a maximum of 59.5%.

关 键 词：固体超强酸 催化剂 S2O -/ZrO2 异构化 Al源 

分 类 号：O643.361[理学—物理化学]