在生物质热解和催化重整过程中用于合成气生产的工程生物炭基催化剂的评价,Energy & Fuels

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在生物质热解和催化重整过程中用于合成气生产的工程生物炭基催化剂的评价
Energy & Fuels ( IF 5.2 ) Pub Date : 2023-03-20 , DOI: 10.1021/acs.energyfuels.3c00410
Hanmin Yang ₁ , Yuxiao Cui ₂ , Yanghao Jin ₁ , Xincheng Lu ₃ , Tong Han ₁ , Linda Sandström ₄ , Pär G. Jönsson ₁ , Weihong Yang ₁

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源自生物质热解的生物炭已被证明是一种很有前途的焦油裂解/重整催化剂，具有很好的抗结焦性。这项工作旨在评估各种工程化的生物炭基催化剂在生物质热解和催化重整过程中对合成气生产的影响，而无需提供额外的蒸汽。测试的工程生物炭催化剂包括物理和化学活化、氮掺杂和镍掺杂的生物炭。结果表明，当使用生物炭和活性生物炭作为催化剂时，合成气产量相当。相对较高的比表面积（SSA）和分级多孔结构有利于合成气和氢气的生产。2 h 物理活化的生物炭催化剂诱导合成气具有最高的 H ₂/CO 比率 (1.5)。由于孔隙结构的坍塌，N 掺杂生物炭的使用显着降低了合成气产量，但获得了具有最高 LHV_气体(18.5MJ/Nm ³ ) 的合成气。使用掺杂 Ni 的生物炭促进了合成气和氢气的高产率（78.2 wt% 和 26 mmol H ₂ /g-生物质）并提高了气体能量转换效率 (73%)。其稳定性和耐久性测试表明，重复使用3次后性能略有下降。建议在未来进行更长时间的实验，以确定催化剂何时最终失活以及如何减少催化剂劣化。

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Evaluation of Engineered Biochar-Based Catalysts for Syngas Production in a Biomass Pyrolysis and Catalytic Reforming Process

Biochar, originating from biomass pyrolysis, has been proven a promising catalyst for tar cracking/reforming with great coke resistance. This work aims to evaluate various engineered biochar-based catalysts on syngas production in a biomass pyrolysis and catalytic reforming process without feeding extra steam. The tested engineered biochar catalysts include physical- and chemical-activated, nitrogen-doped, and nickel-doped biochars. The results illustrated that the syngas yields were comparable when using biochar and activated biochar as catalysts. A relatively high specific surface area (SSA) and a hierarchical porous structure are beneficial for syngas and hydrogen production. A 2 h physical-activated biochar catalyst induced the syngas with the highest H₂/CO ratio (1.5). The use of N-doped biochar decreased the syngas yield sharply due to the collapse of the pore structure but obtained syngas with the highest LHV_gas (18.5MJ/Nm³). The use of Ni-doped biochar facilitated high syngas and hydrogen yields (78.2 wt % and 26 mmol H₂/g-biomass) and improved gas energy conversion efficiency (73%). Its stability and durability test showed a slight decrease in performance after a three-time repetitive use. A future experiment with a longer time is suggested to determine when the catalyst will finally deactivate and how to reduce the catalyst deterioration.

更新日期：2023-03-20

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