| Title | CO 2-assisted fast pyrolysis of palm kernel shells over a Ni - Ce/CN catalyst for the selective production of bio-oil |
|---|---|
| ID_Doc | 13620 |
| Authors | Pham, LKH; Kongparakul, S; Guan, GQ; Chanlek, N; Vo, DVN; Cuong, NV; Watanabe, A; Samart, C |
| Title | CO 2-assisted fast pyrolysis of palm kernel shells over a Ni - Ce/CN catalyst for the selective production of bio-oil |
| Year | 2024 |
| Published | |
| Abstract | Catalytic fast pyrolysis is one of the most promising techniques for the production of bio-oils. Generally, pyrolysis is carried out in an inert atmosphere; however, reactive catalytic pyrolysis has emerged as an alternative technique for achieving high catalytic efficiency. Herein, NiCe/CN catalysts with different Ni:Ce ratios were developed, and their catalytic efficiency in the catalytic fast pyrolysis of palm kernel shells in a CO 2 atmosphere was evaluated. The effects of reaction conditions, including the reaction temperature (400 -600 degrees C) and ratio of Ni:Ce (10:0, 10:1, 10:3, 10:5, and 10:10), on the product yields were studied using in situ and ex situ analyses. NiCe/CN50 exhibited enhanced oxygen removal efficiency owing to the presence of oxygen vacancies in CeO x . In addition, the acidic site of the catalyst promoted the highly selective demethoxylation of alkylphenols. The presence of Ce promoted the Boudouard reaction (C + CO 2 -> 2CO), which reduced coke deposition on the spent catalyst. Our results indicate that the NiCe/CN50 catalyst exhibited good catalytic efficiency, achieving the highly selective production of alkylphenols and acetic acid and low deactivation. Therefore, NiCe/CN50 can be used as an alternative catalyst for phenol production from biomass via catalytic fast pyrolysis. |
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