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利用受污染生物质制备的含钴生物炭材料从烟气中去除单质汞

Removal of Elemental Mercury from Flue Gas Using Cobalt-Containing Biomaterial Carbon Prepared from Contaminated Biomass.

作者信息

Wang Yuan, Li Honghu, He Zhong, Guan Jianmin, Qian Kaikai, Hu Jiangjun

机构信息

School of Resource and Environmental Sciences, Wuhan University, Wuhan, Hubei 430079, PR China.

School of Information and Safety Engineering, Zhongnan University of Economics and Law, Wuhan, Hubei 430073, PR China.

出版信息

ACS Omega. 2020 Mar 17;5(12):6288-6298. doi: 10.1021/acsomega.9b03605. eCollection 2020 Mar 31.

DOI:10.1021/acsomega.9b03605
PMID:32258863
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7114134/
Abstract

biomass (ISBM) used for cobalt (Co) pollution remediation was prepared by one-step pyrolysis and employed to remove elemental mercury (Hg) from flue gas. Results showed that the ISBM pyrolyzed at 700 °C (ISBM700) exhibited good Hg removal performance (about 86%) at 150 °C. The existence of NO and O facilitated the removal of Hg, while SO and water vapor inhibited it. Characterization analysis (including N adsorption-desorption, X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectrometry) showed that ISBM700 has a relatively higher specific surface area, a quantity of lattice oxygen derived from well-dispersed amorphous-phase CoO , and abundant oxygen functional groups. A Mars-Maessen mechanism is thought to be involved in the Hg removal process. The adsorbed Hg could be oxidized to HgO by the surface oxygen species derived from CoO , and then, the consumed surface oxygen species can be replenished by O. Therefore, the Co-contaminated biomass (CCIB) from phytoremediation could be utilized for Hg removal after being pyrolyzed instead of any chemical modification.

摘要

通过一步热解制备了用于钴（Co）污染修复的生物质（ISBM），并将其用于去除烟气中的元素汞（Hg）。结果表明，在700℃热解的ISBM（ISBM700）在150℃时表现出良好的汞去除性能（约86%）。NO和O的存在促进了汞的去除，而SO和水蒸气则抑制了汞的去除。表征分析（包括N吸附-脱附、X射线衍射、扫描电子显微镜、X射线光电子能谱和傅里叶变换红外光谱）表明，ISBM700具有相对较高的比表面积、大量源自分散良好的非晶相CoO的晶格氧以及丰富的氧官能团。认为汞去除过程涉及Mars-Maessen机理。吸附的汞可以被源自CoO的表面氧物种氧化为HgO，然后，消耗的表面氧物种可以由O补充。因此，植物修复产生的钴污染生物质（CCIB）在热解后可用于汞去除，无需任何化学改性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3be9/7114134/a2cacd661cd0/ao9b03605_0002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3be9/7114134/07943704a66f/ao9b03605_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3be9/7114134/a8e7cb5f5637/ao9b03605_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3be9/7114134/2d938ca16a11/ao9b03605_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3be9/7114134/f74ff503f3d1/ao9b03605_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3be9/7114134/bad4b391c5c0/ao9b03605_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3be9/7114134/b57356813896/ao9b03605_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3be9/7114134/adb349541351/ao9b03605_0009.jpg
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