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Carbide slag as the sorbent for Ni-based DFMs for ICCU-RWGS

“The effects of preparation methods for using carbide slag (CS) as the sorbent and support for 10 wt%Ni were reported (Wang, G. et al., 2022). The wet-mixing (Ni/CS), acidification with 30% propionic acid and impregnation (Ni/CS-P30), and acidification/impregnation combined with citric acid complexation (Ni/CS-P30-C) were prepared and compared for their performance in RWGS reaction at 650°C. The Ni/CS-P30-C with propionic acid pretreatment and citric aids complex showed higher surface area and expanded pore structure, facilitating Ni accommodation and uniform dispersion. Citric acid was also reported to be able to prevent the Ni particle agglomeration and maintain the particle size, thus providing considerable active sites for the hydrogenation. The CO productivity was 5.12 mmol/g with a selectivity of 100% on Ni/CS-P30-C, comparing to the 2.86 and 0.78 mmol/g for Ni/CS-P30 and Ni/CS, respectively. (results are shown below).”

https://doi.org/10.1016/j.ccst.2022.100052

1-s2.0-S2212982019300472-gr7_lrgV6Sy6eD

Figure results – ICCU-RWGS performance using three Ni/CS based DFMs (https://doi.org/10.1016/j.cej.2021.132110)

 

The preparation method of Ni/carbide slag is shown below:

1-s2.0-S1385894721036895-gr1_lrg

https://doi.org/10.1016/j.cej.2021.132110

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