摘要
通过浸渍法制备出一系列氧化钙负载铂金属催化材料,用于生物质基糠醇选择性加氢制备戊二醇研究。研究采用X射线衍射仪、扫描电子显微镜、CO_(2)-程序升温脱附、N2等温吸附-脱附、X射线光电子能谱、热重-差热分析法等一系列表征手段,对合成的催化剂样品物理化学性质进行了系统表征。实验结果表明,Pt/CaO-600催化剂表现出优异的催化活性,在4MPa氢压、210℃反应温度条件下,糠醇转化率为99.8%,1,2-戊二醇和1,5-戊二醇收率分别可达48.6%和21.5%。催化剂的优异性能可归因于作为载体的CaO提供了适宜的碱性位点,有利于糠醇开环反应的发生,进而提高了糠醇转化率与戊二醇选择性。同时,催化剂还表现出了优异的循环使用性能,经重复使用4次后,其催化糠醇转化率可达96.5%,1,2-戊二醇和1,5-戊二醇的收率分别为40.3%和17.0%。
A series of Pt/CaO catalysts were synthesized via impregnation method and applied for the selective hydrogenation of bio-based furfuryl alcohol into pentanediol.The physicochemical characteristics of the as-prepared catalysts were comprehensively characterized through X-ray diffractometer,scanning electron microscopy,CO_(2)-temperature programmed desorption,N2 isothermal adsorption-desorption,X-ray photoelectron spectroscopy,and thermogravimetric-differential thermal analysis.The experimental results showed that the Pt/CaO-600 catalyst exhibited excellent catalytic activity towards furfuryl alcohol hydrogenation.Gratifyingly,the furfuryl alcohol conversion achieved 99.8%,and the yields of 1,2-pentanediol and 1,5-pentanediol were 48.6%and 21.5%respectively at 210℃under 4MPa H2.The good activity of Pt/CaO could be attributed to the fact that the carrier CaO provided appropriate amounts of basic sites,which facilitated the ring-opening reaction of furfuryl alcohol,thus improving the conversion and pentanediol selectivity.Moreover,the as-prepared Pt/CaO also exhibited excellent performance in recycling experiments,wherein the yields of 1,2-pentanediol and 1,5-pentanediol reached 40.3%and 17.0%respectively with 96.5%furfuryl alcohol conversion after being repeated four times.
作者
萧垚鑫
张军
单锐
袁浩然
陈勇
XIAO Yaoxin;ZHANG Jun;SHAN Rui;YUAN Haoran;CHEN Yong(Institute of Biomass Engineering,South China Agricultural University,Guangzhou 510642,Guangdong,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences(CAS),Guangzhou 510640,Guangdong,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,Guangdong,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,Guangdong,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2024年第3期1318-1327,共10页
Chemical Industry and Engineering Progress
基金
国家自然科学基金面上项目(51976222)
能源清洁利用国家重点实验室开放基金(ZJU-CEU2020023)
中国科学院青年创新促进会会员(2023367)。
关键词
糠醇
催化
加氢
戊二醇
furfuryl alcohol
catalysis
hydrogenation
pentanediol
