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Molten salt-derived biochar with tunable pore architecture as non-metallic catalysts for acetylene hydrochlorination
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DOI：10.1016/j.cjche.2026.03.004.png)
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Abstract
En 中文
Biochar-based catalysts show significant potential to replace toxic mercuric chloride in acetylene hydrochlorination. However, the mechanistic role of their non-metallic active sites remains scarcely investigated, particularly regarding the synergistic interplay between pore architecture and surface functionalities. Herein, a series of biochar based catalysts with rich microstructures were successfully prepared by using molten salt as medium, which were used in acetylene hydrochlorination. The method of preparing biochar by liquid medium of molten salt was optimized by adjusting the ratio of terpolymer salts, mesh number, constant temperature duration, reaction temperature and heating rate, etc. The materials were analyzed by BET, XRD, TGA, SEM and TEM. The results showed that the biochar materials had abundant pore structure and adjustable pore volume, and it was found that biochar with larger pore volume showed higher acetylene hydrochlorination conversion at the same pore size of 1.8 nm. Analysis suggests that biochar with large pore volume has more carbon "chambers" at the micropore size, which effectively promotes the "one-to-one" pairing of C2H2 and HCl molecules. This work found that the catalytic performance of acetylene hydrochlorination could be improved effectively by microstructural regulation of nonmetallic catalysts.
Keywords:
biochar
acetylene hydrochlorination
non-metallic catalysts
pore architecture
catalytic performance
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