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纳米多孔钌催化纤维素高效转化制备甲烷

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Indexed by:期刊论文

Date of Publication:2018-05-24

Journal:精细化工

Volume:35

Issue:8

Page Number:1338-1345

ISSN No.:1003-5214

Key Words:纳米多孔钌;纤维素;甲烷;催化

Abstract:以钌、铝两种金属制备了纳米多孔钌催化剂,并将其应用于催化纤维素制甲烷反应中.对纤维素和催化剂进行了XRD、SEM、TEM和XPS表征,并对催化过程进行了温度和压力考察.结果表明:在反应温度220℃、初始氢气压力0.5 MPa下反应8 h,纤维素转化率为75.8%,甲烷选择性达到82.2%.具有纳米多孔结构的催化剂稳定性良好,可循环套用10次,甲烷收率保持在73.2%~79.5%.考察了纤维素的转化历程和反应前后纤维素结构变化.结果表明:纤维素制备甲烷反应分为酸催化的水解过程和纳米多孔钌催化的加氢过程两个阶段.钒改性纳米多孔钌双功能催化体系可以提高纤维素向甲烷转化,纤维素的转化率及甲烷的收率分别达到了49.3%和38.8%.

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