Reverse chemical looping pyrolysis characteristics of pine wood biomass over reduced Ca2Fe2O5 oxygen carrier

IF 5.8 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis Pub Date : 2025-05-14 DOI:10.1016/j.jaap.2025.107177

Wenyao Li, Longxin Zhao, Xinyan Jiang, Zhiyang Yu, Yongzhuo Liu

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引用次数: 0

Abstract

Reverse chemical looping pyrolysis (RCLPy) innovatively utilizes a reduced oxygen carrier (Re-OC) to transfer biomass oxygen during pyrolysis for subsequent semi-char gasification, thereby enhancing the quality of both bio-oils and syngas. In this study, the RCLPy characteristics of pine wood biomass was evaluated using a Ca₂Fe₂O₅-derived Re-OC under various temperatures and different mass ratios of Re-OC to biomass (Re-OC/B). The results indicated that elevated temperatures enhanced biomass cracking, while increased Re-OC/B mass ratios improved bio-oil quality by catalytic deoxygenation and in-situ hydrogenation. Specifically, Re-OC decreased the relative content of oxygenated compounds to 26.3 %, with carboxylic acids plummeting from 29.6 % (direct pyrolysis) to 1.3 %. Additionally, the Re-OC increased the relative content of phenols to 49.4 %, and the hydrogen-rich environment created by Re-OC facilitates the formation of H-phenols without methoxy groups via hydrodeoxygenation (HDO). This RCLPy strategy enables efficient oxygen-transferring and endogenous hydrogen utilization in the conversion of pine wood biomass.

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松木生物质在还原性Ca2Fe2O5氧载体上的反化学环热解特性

反化学环热解（RCLPy）创新地利用还原氧载体（Re-OC）在热解过程中转移生物质氧，用于随后的半焦气化，从而提高生物油和合成气的质量。在不同温度和不同Re-OC/生物质质量比（Re-OC/B）条件下，采用ca2fe2o5衍生Re-OC对松木生物质的RCLPy特性进行了评价。结果表明，温度升高促进了生物质裂解，Re-OC/B质量比的提高通过催化脱氧和原位加氢提高了生物油的质量。具体来说，Re-OC将含氧化合物的相对含量降低到26.3 %，羧酸从29.6 %（直接热解）下降到1.3 %。Re-OC使苯酚的相对含量提高到49.4 %，Re-OC形成的富氢环境有利于氢脱氧（HDO）生成不含甲氧基的h -苯酚。这种RCLPy策略能够在松木生物质转化过程中实现高效的氧传递和内源氢利用。

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来源期刊

Journal of Analytical and Applied Pyrolysis 化学-分析化学

CiteScore

9.10

自引率

11.70%

发文量

340

审稿时长

44 days

期刊介绍： The Journal of Analytical and Applied Pyrolysis (JAAP) is devoted to the publication of papers dealing with innovative applications of pyrolysis processes, the characterization of products related to pyrolysis reactions, and investigations of reaction mechanism. To be considered by JAAP, a manuscript should present significant progress in these topics. The novelty must be satisfactorily argued in the cover letter. A manuscript with a cover letter to the editor not addressing the novelty is likely to be rejected without review.