摘要
开发高活性、稳定性的铟基催化剂促进二氧化碳加氢制甲醇对推动绿色可持续发展具有重要研究意义。采用共沉淀法成功地将镍引入到氧化铟,有效地调控了该晶体的结构和表面性质。通过表征分析镍含量对催化剂性能的影响,结果显示当氧化铟中镍引入量为2.5%时,镍以高度分散的Ni^(2+)形式存在于材料晶体结构中,该分布显著地增加了材料表面的氧空位含量;而当镍引入量达10.0%时,镍不仅以Ni^(2+)形态存在,还部分以金属单质形态出现。在260℃、3 MPa、空速为8 000 mL·g^(-1)·h^(-1)条件下,比较不同镍含量的氧化铟的催化性能,2.5%Ni@In_(2)O_(3)展现出较优的催化性能,实现了5.5%的CO_(2)转化率,36.5%的甲醇选择性,揭示了适量Ni的引入可以优化In_(2)O_(3)表面的氧空位,进而增强催化剂的活性。
The development of indium-based catalysts with high activity and stability for promoting carbon dioxide hydrogenation to methanol is indeed a significance area of research for advancing green and sustainable technologies.The introduction of Ni into indium oxide through the co-precipitation method has been shown to effectively modulate the structure and surface properties of the crystal,leading to enhanced catalytic performance.In results,it was found that at a Ni content of 2.5%,Ni primarily exists as highly dispersed Ni^(2+)within the crystal structure,which significantly increases the oxygen vacancy content on the surface of the material.While at a higher Ni content of 10.0%,Ni exists not only in the form of Ni^(2+),but also partly in the metallic form.Comparing the catalytic performance of indium oxide with different nickel content at 260℃,3 MPa and space velocity of 8000 mL·g^(-1)·h^(-1),2.5%Ni@In_(2)O_(3) exhibits better catalytic performance,achieving CO_(2) conversion of 5.5%and methanol selectivity of 36.5%.This suggests that controlling the Ni content and its chemical state in indium oxide catalysts can optimize the oxygen vacancy on the surface of In_(2)O_(3) and enhance the activity of catalyst.
作者
李萍萍
关林杰
张龙
丁茂峰
徐丹云
谢德龙
LI Pingping;GUAN Linjie;ZHANG Long;DING Maofeng;XU Danyun;XIE Delong(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,China;School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;Zhejiang Institute of Tianjin University,Zhejiang,Shaoxing 312300,China)
出处
《化学工业与工程》
CSCD
北大核心
2024年第5期121-130,共10页
Chemical Industry and Engineering
基金
云南省企业基础研究应用基础研究联合专项项目(202101BC070001-016)
天津大学浙江研究院基金(绍兴)(2024-QT-0003,2023-ZX-0007,2023X1-0002)
关键词
二氧化碳加氢
氧化铟
甲醇
镍掺杂
氧空位
carbon dioxide hydrogenation
In_(2)O_(3)
methanol
Ni-doped
oxygen vacancy
