期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 58, 期 12, 页码 4755-4763出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.8b05402
关键词
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资金
- National Key R&D Program of China [2017YFB0602203]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA21020300, XDB17020400]
Although homogeneous methanol carbonylation is industrialized to produce acetic acid, it still suffers from the problems of difficult separation and metal leaching. Here, we report a heterogeneous single atom Ir-La/AC catalyst to produce methyl acetate in a fixed-bed reactor. A high TOF of 2200h(-1) and high selectivity over 90% for methyl acetate with space time yield of 8200 g/(kg(cat) h) were achieved over the Ir-La/AC catalyst. Furthermore, the effects of reaction temperature, partial pressure of CO and CH3OH, weight ratio of CH3I/CH3OH, total LHSV as well as the role of La on the catalytic performance of Ir/AC were tested in this paper. In addition, we proposed a reasonable mechanism for heterogeneous methanol carbonylation over La stabilized single atom Ir/AC catalyst. Our work provides a reference for the further scale-up of the process and a stable, supported, single-atom system as a substitution for other homogeneous catalyst.
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