Particle Size Effects of Cobalt Carbide for Fischer–Tropsch to Olefins

Dai, Yuanyuan; Zhao, Yue; Lin, Tiejun; Li, Shenggang; Yu, Fei; An, Yunlei; Wang, Xinxing; Xiao, Kang; Sun, Fanfei; Jiang, Zheng; Lu, Yonglin; Wang, Hui; Zhong, Liangshu; Sun, Yuhan

doi:10.1021/acscatal.8b03631

Cited by 55 publications

(34 citation statements)

References 47 publications

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“… Particle size effects of cobalt carbide for Fischer–Tropsch to olefinsDaiY.ZhaoY.LinT.LiS.YuF.AnY.WangX.XiaoK.SunF.JiangZ.LuY.WangH.ZhongL.SunY. Dai, Y. Zhao, Y. Lin, T. Li, S. Yu, F. An, Y. Wang, X. Xiao, K. Sun, F. Jiang, Z. Lu, Y. Wang, H. Zhong, L. Sun, Y. ACS Catal.20199798809 …”

Section: Key Referencesmentioning

confidence: 99%

“…FTS is a typical structure-sensitive reaction, and the particle size will greatly influence the surface structure of the active phase that may finally determine the catalytic behavior of a heterogeneous catalyst. , The particle size effect of Co 0 and Fe x C has been widely investigated for FTS, and the reported critical size is typically at around 6–8 nm. , The finding of highly efficient Co 2 C nanoprisms for FTO reaction inspired us to further investigate the size effect of Co 2 C nanoparticles during CO hydrogenation …”

Section: Exploiting Catalytic Application Of Co2c Nanoprisms For Fto ...mentioning

confidence: 99%

“…2019, 9, 798−809. 3 The particle size ef fect of Co 2 C nanostructures essentially originated from the proportion of exposed facets based on the experimental design, kinetic measurements, and DFT calculations.…”

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Cobalt Carbide Nanocatalysts for Efficient Syngas Conversion to Value-Added Chemicals with High Selectivity

Lin

et al. 2021

Acc. Chem. Res.

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Conspectus Syngas conversion is a key platform for efficient utilization of various carbon-containing resources including coal, natural gas, biomass, organic wastes, and even CO2. One of the most classic routes for syngas conversion is Fischer–Tropsch synthesis (FTS), which is already available for commercial application. However, it still remains a grand challenge to tune the product distribution from paraffins to value-added chemicals such as olefins and higher alcohols. Breaking the selectivity limitation of the Anderson–Schulz–Flory (ASF) distribution has been one of the hottest topics in syngas chemistry. Metallic Co0 is a well-known active phase for Co-catalyzed FTS, and the products are dominated by paraffins with a small amount of chemicals (i.e., olefins or alcohols). Specifically, a cobalt carbide (Co2C) phase is typically viewed as an undesirable compound that could lead to deactivation with low activity and high methane selectivity. Although iron carbide (Fe x C) can produce olefins with selectivity up to ∼60%, the fraction of methane is still rather high, and the required high reaction temperature (300–350 °C) typically causes coke deposition and fast deactivation. Recently, we discovered that Co2C nanoprisms with preferentially exposed facets of (020) and (101) can effectively produce olefins from syngas conversion under mild reaction conditions with high selectivity. The methane fraction was limited within 5%, and the product distribution deviated greatly from ASF statistic law. The catalytic performances of Co2C nanoprisms are completely different from that reported for the traditional FT process, exhibiting promising potential industrial application. This Account summarizes our progress in the development of Co2C nanoprisms for Fischer–Tropsch synthesis to olefins (FTO) with remarkable efficiencies and stability. The underlying mechanism for the observed unique catalytic behaviors was extensively explored by combining DFT calculation, kinetic measurements, and various spectroscopic and microscopic investigation. We also emphasize the following issues: particle size effect of Co2C, the promotional effect of alkali and Mn promoters, and the role of metal–support interaction (SMI) in fabricating supported Co2C nanoprisms. Specially, we briefly review the synthetic methods for different Co2C nanostructures. In addition, Co2C can also be applied as a nondissociative adsorption center for higher alcohol synthesis (HAS) via syngas conversion. We also discuss the construction of a Co0/Co2C interfacial catalyst for HAS and demonstrate how to tune the reaction network and strengthen CO nondissociative adsorption ability for efficient production of higher alcohols. We believe that the advances in the development of Co2C nanocatalysts described here present a critic step to produce chemicals through the FTS process.

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Section: Key Referencesmentioning

confidence: 99%

Section: Exploiting Catalytic Application Of Co2c Nanoprisms For Fto ...mentioning

confidence: 99%

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Cobalt Carbide Nanocatalysts for Efficient Syngas Conversion to Value-Added Chemicals with High Selectivity

Lin

et al. 2021

Acc. Chem. Res.

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“…Quite recently, the role of Co 2 C has been turned. For example, Zhong et al revealed a high relevancy among the particle size, the exposed facets of Co 2 C and catalytic performance [15] . The specific Co 2 C surface exhibited excellent selectivity towards the formation of lower olefins with low selectivity towards methane production [16] .…”

Section: Introductionmentioning

confidence: 99%

Effects of cobalt carbide on Fischer–Tropsch synthesis with MnO supported Co-based catalysts

Sun

Yang

Xia

et al. 2020

Journal of Energy Chemistry

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“…Because of the limitation of the Anderson-Schulz-Flory (ASF) distribution law [11][12][13], the selectivity of C 2 -C 4 hydrocarbons is theoretically less than 58%. In recent years, owing to the precise design of the catalysts, the selectivity of olefins has reached nearly 60% for FTO process [10,14]. In 2016, Bao's group surprisingly obtained about 80% light olefins at 17% CO conversion over a physically mixed ZnCrAlO x and SAPO-34 catalyst [15].…”

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confidence: 99%