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Pt负载分层纳米结构氧化铝催化油酸脱羧的研究

Decarboxylation of oleic acid over Pt-supported hierarchical nanostructured alumina
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摘要 以MOF材料为前驱体合成三维形貌的氧化铝(3DAO),采用低温水热法合成了具有分层纳米结构的勃姆石(HNγ-AlOOH),最后经煅烧形成相同纳米结构的活性氧化铝(HNγ-Al_(2)O_(3))。以HNγ-Al_(2)O_(3)为载体制备了一系列负载量(0.5%、1%和1.5%)的Pt/HNγ-Al_(2)O_(3)双功能催化剂,并将其用于油酸脱羧制备航空煤油。利用XRD、SEM、TEM、BET等对催化剂进行表征。结果表明,HNγ-Al_(2)O_(3)具有丰富的孔结构、较高的比表面积(266.8 m^(2)/g)和适宜的酸性。1%Pt/HNγ-Al_(2)O_(3)具有最优的催化性能,在反应温度为340℃、反应时间为5 h时,C_(8)~C_(17)的收率可达84.8%。 Three-dimensional alumina(3DAO)is synthesized with MOF material as a precursor.Boehmite(HNγ-AlOOH)with a hierarchical nanostructure is synthesized through using a low-temperature hydrothermal method,and then calcined to form activated alumina(HNγ-Al_(2)O_(3))with the same nanostructure.A series of Pt/HNγ-Al_(2)O_(3)bifunctional catalysts with loading amounts of 0.5%,1%and 1.5%respectively are prepared by using the as-prepared HNγ-Al_(2)O_(3)as a carrier,and served for the decarboxylation of oleic acid to produce aviation kerosene.The catalysts prepared are characterized by means of XRD,SEM,TEM,BET,etc.It is found that HNγ-Al_(2)O_(3)has rich pore structure,high specific surface area(266.8 m^(2)·g^(-1))and suitable acidity.The 1%Pt/HNγ-Al_(2)O_(3)has the best catalytic performance,over which the yield of C_(8)-C_(17)alkanes can reach 84.8%when the reaction temperature is 340℃and the reaction time is 5 h.
作者 王珉鑫 石祥 姜国平 WANG Min-xin;SHI Xiang;JIANG Guo-ping(Chemical Science and Engineering College,North Minzu University,Yinchuan 750021,China;Key Laboratory for Chemical Technology,China's National Ethnic Affairs Commission,Yinchuan 750021,China;Ningxia Key Laboratory of Solar Energy Chemical Conversion Technology,Yinchuan 750021,China)
出处 《现代化工》 CAS CSCD 北大核心 2024年第5期187-193,共7页 Modern Chemical Industry
基金 校企横向科研项目(HKY-201800187,HKY-201800189)。
关键词 分层纳米结构 氧化铝 低温水热 脱羧 C_(8)~C_(17)烷烃 hierarchical nanostructure alumina low temperature hydrothermal decarboxylation C_(8)~C_(17)alkanes
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