Biochar-supported zinc ferrite for H2S removal at room temperature in anaerobic conditions

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2025-09-11 DOI:10.1016/j.cherd.2025.09.015

Bo Yu , Jialan Mi , Chenyuan Cui , Siwei Xiang , Kui Qiu

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Abstract

In this study, a novel biochar-supported zinc ferrite (ZnFe₂O₄@BC) composite was synthesized via a hydrothermal process to efficiently remove hydrogen sulfide (H₂S) under anaerobic conditions at room temperature. Comprehensive characterization by XRD, FT‑IR, BET, and SEM confirmed that ZnFe₂O₄ nanoparticles were uniformly dispersed on the biochar matrix, creating a porous structure that enhanced gas diffusion and minimized particle agglomeration. Systematic investigations of key parameters, including biochar dosage, operating temperature, flow rate, and loading amount, revealed that optimal conditions (0.2 g ZnFe₂O₄, 0.8 g BC, 30 mL/min flow rate at 30 °C) yielded an impressive H₂S adsorption capacity of 309.9 mg/g. Further analyses using XRD, FT‑IR, SEM, and XPS on the post-adsorption composite elucidated the multi-step adsorption-redox-chemical reaction mechanism underlying the desulfurization process. Additionally, repeated cyclic adsorption-desorption tests confirmed the robust stability and regeneration capability of ZnFe₂O₄@BC, indicating its promise as an effective adsorbent for H₂S removal in anaerobic environments.

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生物炭载铁酸锌在室温厌氧条件下脱除H2S的研究

在本研究中，通过水热法合成了一种新型生物炭负载铁酸锌（ZnFe2O4@BC）复合材料，在室温厌氧条件下高效去除硫化氢（H2S）。通过XRD、FT - IR、BET和SEM的综合表征证实，ZnFe2O4纳米颗粒均匀地分散在生物炭基体上，形成了多孔结构，增强了气体扩散，最大限度地减少了颗粒团聚。系统研究了生物炭投加量、操作温度、流量和装填量等关键参数，结果表明，最佳条件（0.2 g ZnFe2O4、0.8 g BC、30 mL/min流速，30°C）对H2S的吸附量为309.9 mg/g。进一步利用XRD、FT - IR、SEM和XPS对吸附后复合材料进行分析，阐明了脱硫过程的多步吸附-氧化还原-化学反应机理。此外，反复循环吸附-解吸试验证实了ZnFe2O4@BC的稳定性和再生能力，表明其有望成为厌氧环境中去除H2S的有效吸附剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.