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用于沼气中硫化氢去除的双金属化合物在活性炭上的性能和表征。

Performance and Characterization of Bi-Metal Compound on Activated Carbon for Hydrogen Sulfide Removal in Biogas.

机构信息

Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, UKM, Bangi 43600, Selangor, Malaysia.

Fuel Cell Institute, UKM, Bangi 43600, Selangor, Malaysia.

出版信息

Molecules. 2022 Dec 17;27(24):9024. doi: 10.3390/molecules27249024.

DOI:10.3390/molecules27249024
PMID:36558155
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9781676/
Abstract

This study reports on the synthesis of bi-metal compound (BMC) adsorbents based on commercial coconut activated carbon (CAC), surface-modified with metal acetate (ZnAc), metal oxide (ZnO), and the basic compounds potassium hydroxide (KOH) and sodium hydroxide (NaOH). The adsorbents were then characterized by scanning electron microscopy and elemental analysis, microporosity analysis through Brunauer-Emmett-Teller (BET) analysis, and thermal stability via thermogravimetric analysis. Adsorption-desorption test was conducted to determine the adsorption capacity of HS via 1 L adsorber and 1000 ppm HS balanced 49.95% for N and CO. Characterization results revealed that the impregnated solution homogeneously covered the adsorbent surface, morphology, and properties. The adsorption test result reveals that the ZnAc/ZnO/CAC_B had a higher HS breakthrough adsorption capacity and performed at larger than 90% capability compared with a single modified adsorbent (ZnAc/CAC). Therefore, the synthesized BMC adsorbents have a high HS loading, and the abundance and low cost of CAC may lead to favorable adsorbents in HS captured.

摘要

本研究报告了基于商业椰子活性炭 (CAC) 的双金属化合物 (BMC) 吸附剂的合成，该吸附剂经过金属醋酸盐 (ZnAc)、金属氧化物 (ZnO) 和碱性化合物氢氧化钾 (KOH) 和氢氧化钠 (NaOH) 的表面修饰。然后通过扫描电子显微镜和元素分析、通过 Brunauer-Emmett-Teller (BET) 分析进行微孔分析以及通过热重分析进行热稳定性分析对吸附剂进行了表征。通过 1 L 吸附器和 1000 ppm HS 平衡 49.95% 的 N 和 CO 进行了吸附-解吸测试，以确定 HS 的吸附容量。表征结果表明，浸渍溶液均匀覆盖了吸附剂的表面、形态和性质。吸附测试结果表明，与单一改性吸附剂 (ZnAc/CAC) 相比，ZnAc/ZnO/CAC_B 具有更高的 HS 穿透吸附容量，性能大于 90%。因此，合成的 BMC 吸附剂具有较高的 HS 负载量，而 CAC 的丰富和低成本可能会导致 HS 捕获的有利吸附剂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/06b3ec620e54/molecules-27-09024-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/c63606f3bc79/molecules-27-09024-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/bd29925fbcaa/molecules-27-09024-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/1b027b7d2976/molecules-27-09024-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/4ec8898c8abd/molecules-27-09024-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/602474b569d0/molecules-27-09024-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/f47fc08addbc/molecules-27-09024-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/06b3ec620e54/molecules-27-09024-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/c63606f3bc79/molecules-27-09024-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/bd29925fbcaa/molecules-27-09024-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/1b027b7d2976/molecules-27-09024-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/4ec8898c8abd/molecules-27-09024-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/602474b569d0/molecules-27-09024-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/f47fc08addbc/molecules-27-09024-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0186/9781676/06b3ec620e54/molecules-27-09024-g007.jpg

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