3D多级孔炭负载铜催化剂及其合成碳酸二甲酯性能研究
Study on 3D-interconnected hierarchical porous carbon supported Cu catalyst and its properties in dimethyl carbonate synthesis
裴永丽 1李挺 1王海堂 1武江红 1康茂萍1
作者信息
- 1. 山西能源学院能源化学与材料工程系,山西 晋中 030600
- 折叠
摘要
以α-纤维素和NaHCO3 为原料,采用生物质发泡法制得大孔、介孔和微孔共存的三维(3D)多级孔炭(HPC);以硝酸铜为铜源,通过调变铜负载量制得 3D多级孔炭负载铜催化剂(y Cu/HPC),并考察其催化甲醇氧化羰基化合成碳酸二甲酯性能.实验结果表明:当铜负载量(质量分数)为 10%时,10Cu/HPC催化剂在DMC合成反应中时空收率(STYDMC)和转换频率(TOF)分别达 1 778 mg/(g·h)和 13.8 s-1.N2 吸附、XRD、TEM等表征表明:3D多级孔结构不但有利于铜物种的高度分散,同时可加快底物分子的传质速率,从而提升催化活性.
Abstract
Using α-cellulose and NaHCO3 as raw materials,three-dimensional(3D)-interconnected hierarchical porous carbon(HPC)with macroporous,mesoporous and microporous coexistence was obtained by the biomass foaming method.Then copper nitrate was used as the copper source,a three-dimensional(3D)-interconnected hierarchical porous carbon(HPC)supported Cu catalyst(yCu/HPC)was prepared by adjusting the copper loading amount,and its catalytic performance for methanol oxidative carbonylation was investigated.The experimental results showed that when the copper load(mass fraction)was 10%,the space-time yield(STYDMC)and conversion frequency(TOF)of 10Cu/HPC catalyst in the synthesis reaction of dimethyl carbonate(DMC)reached 1 778 mg/(g·h)and 13.8 s-1 respectively.N2 adsorption,XRD,TEM and other characterizations showed that the 3D-interconnected hierarchical porous carbon was not only conducive to the high dispersion of copper species,but also accelerated the mass transfer rate of substrate molecules,thus improving the catalytic activity.
关键词
碳酸二甲酯(DMC)/3D多级孔炭/铜催化剂/活性Key words
dimethyl carbonate(DMC)/3D hierarchical porous carbon/Cu catalyst/activity引用本文复制引用
基金项目
山西省基础研究计划(自由探索类)(202203021222330)
山西省基础研究计划(自由探索类)(202303021222297)
山西省高等学校科技创新项目(2023L395)
山西能源学院院级科研基金(ZB-2023003)
出版年
2024
NETL
NSTL
维普
万方数据