当前位置：
X-MOL 学术
›
Ind. Eng. Chem. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Experimental and Theoretical Insights into the Effect of Syngas Components on Hg0 Removal over CoMn2O4 Sorbent
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-27 , DOI: 10.1021/acs.iecr.0c00251 Zhen Wang 1 , Yingju Yang 1 , Jing Liu 1 , Feng Liu 1 , Xuchen Yan 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-27 , DOI: 10.1021/acs.iecr.0c00251 Zhen Wang 1 , Yingju Yang 1 , Jing Liu 1 , Feng Liu 1 , Xuchen Yan 1
Affiliation
|
CoMn2O4 spinel sorbent was applied to remove Hg0 in coal-derived syngas. The impacts of syngas components, including H2S, H2, CO, HCl, and H2O, on Hg0 abatement were examined. Moreover, the Hg0 removal mechanism over the CoMn2O4 surface was elucidated in detail by combining experiments and density functional theory (DFT) calculations. About 90% Hg0 abatement was obtained using CoMn2O4 sorbent in 40–200 °C under syngas atmosphere. H2S could adsorb and generate active sulfur upon CoMn2O4 and, hence, played the most important role in Hg0 elimination. HCl also facilitated Hg0 capture by producing reactive chlorine compounds. Under N2 atmosphere, H2, CO, and H2O played an inhibitory effect on Hg0 removal, but they did not affect Hg0 removal in the presence of H2S. Based on the experimental and DFT results, the Langmuir–Hinshlwood mechanism, where chemically adsorbed mercury interacts with surface sulfur from H2S dissociation, is responsible for the reaction between Hg0 and H2S over CoMn2O4. After Hg0 removal, HgS was formed and bonded to CoMn2O4 sorbent, which was certified using TPD and XPS analyses.
中文翻译：
合成气成分对CoMn 2 O 4吸附剂中Hg 0去除效果的实验和理论研究
应用CoMn 2 O 4尖晶石吸附剂去除煤制合成气中的Hg 0。考察了包括H 2 S，H 2，CO，HCl和H 2 O在内的合成气成分对减少Hg 0的影响。此外，通过结合实验和密度泛函理论（DFT）计算，详细阐明了CoMn 2 O 4表面的Hg 0去除机理。使用CoMn 2 O 4吸附剂在40–200°C的合成气气氛下可减少约90％的Hg 0。高2S可以在CoMn 2 O 4上吸附并产生活性硫，因此在Hg 0的消除中起着最重要的作用。HCl还通过生成反应性氯化合物来促进Hg 0的捕获。在N 2气氛下，H 2，CO和H 2 O对Hg 0的去除具有抑制作用，但在H 2 S存在下它们并不影响Hg 0的去除。基于实验和DFT结果，Langmuir- Hinshlwood机制（其中化学吸附的汞与H 2 S分解产生的表面硫相互作用）导致Hg 0之间的反应和H 2 S在CoMn 2 O 4之上。除去Hg 0后，形成HgS并键合到CoMn 2 O 4吸附剂上，该吸附剂使用TPD和XPS分析进行了验证。
更新日期：2020-04-24
中文翻译：
合成气成分对CoMn 2 O 4吸附剂中Hg 0去除效果的实验和理论研究
应用CoMn 2 O 4尖晶石吸附剂去除煤制合成气中的Hg 0。考察了包括H 2 S，H 2，CO，HCl和H 2 O在内的合成气成分对减少Hg 0的影响。此外，通过结合实验和密度泛函理论（DFT）计算，详细阐明了CoMn 2 O 4表面的Hg 0去除机理。使用CoMn 2 O 4吸附剂在40–200°C的合成气气氛下可减少约90％的Hg 0。高2S可以在CoMn 2 O 4上吸附并产生活性硫，因此在Hg 0的消除中起着最重要的作用。HCl还通过生成反应性氯化合物来促进Hg 0的捕获。在N 2气氛下，H 2，CO和H 2 O对Hg 0的去除具有抑制作用，但在H 2 S存在下它们并不影响Hg 0的去除。基于实验和DFT结果，Langmuir- Hinshlwood机制（其中化学吸附的汞与H 2 S分解产生的表面硫相互作用）导致Hg 0之间的反应和H 2 S在CoMn 2 O 4之上。除去Hg 0后，形成HgS并键合到CoMn 2 O 4吸附剂上，该吸附剂使用TPD和XPS分析进行了验证。
京公网安备 11010802027423号