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首页> 外文期刊>Energy & fuels >Performance of Bimetallic Additives (Fe-Co, Mn-Co, Cu-Co, and Zn-Co) Modified Na_2S/AC Deoxidizers in Removal of O_2 from Low-Concentration Coalbed Gas
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Performance of Bimetallic Additives (Fe-Co, Mn-Co, Cu-Co, and Zn-Co) Modified Na_2S/AC Deoxidizers in Removal of O_2 from Low-Concentration Coalbed Gas

机译：双金属添加剂（Fe-Co，Mn-Co，Cu-Co和Zn-Co）改性的Na_2S / AC脱氧剂在低浓度煤层气中脱除O_2的性能

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摘要

In this study, the deoxidizer Na2S was modified by different transition bimetals (Fe-Co, Mn-Co, Cu-Co, and Zn-Co) and Fe-Co ratios as auxiliary. The obtained deoxidizers were characterized by X-ray diffraction, N-2 adsorption/desorption, X-ray photoelectron spectroscopy, and H-2-TPR; their deoxidizing activity for the removal of O-2 from low-Concentration coalbed gas (CBM) were studied. Results showed that reactive oxygen species (O -) pound Content in Na2S deoxidizer, as well as unit effective deoxidization capacity (Q(O2)) and-Conversion rate of (C-Na2s), increased after modification with Fe-Co, Mn-Co, and Cu-Co. The higher the O - pound Content in deoxidizers, the higher the activity of the deoxidizers for the removal of O-2 from CBM was. Fe/Co Na2S/activated carbon (AC) had the highest amount of O - pound Content, larger pore volume, and less impurity species with small crystal size, and this made it the largest Q(O2) (63.74 mL/g) and C-Na2S (87.24%) at 200 degrees C and 1 atm. Although the deoxidizer Zn/Co-Na2S/AC modified with Zn-Co had larger O - pound Content, Q(O2) and C-Na2S of this deoxidizer is the lowest due to the presence of more impurities CoS2, CoO, and NaOH with larger crystal size on its surface. These impurities blocked the pores of the deoxidizer Zn/Co-Na2S/AC and inhibited both mass transfer and reaction of reactants through the material, resulting in declined activity. The deoxidizer Fe/Co (0.33/1)-Na2S/AC showed higher deoxidizing activity when the Fe-Co ratio was 0.33/1.
机译：在这项研究中，脱氧剂Na2S被不同的过渡双金属（Fe-Co，Mn-Co，Cu-Co和Zn-Co）和Fe-Co比率辅助改性。通过X射线衍射，N-2吸附/脱附，X射线光电子能谱和H-2-TPR表征所获得的脱氧剂。研究了它们对脱除低浓度煤层气中O-2的脱氧活性。结果表明，用Fe-Co，Mn-改性后，Na2S脱氧剂中活性氧（O-）的含量，单位有效脱氧容量（Q（O2））和转化率（C-Na2s）均增加。 Co和Cu-Co。脱氧剂中O磅含量越高，脱氧剂从煤层气中去除O-2的活性越高。 Fe / Co Na2S /活性炭（AC）的O-磅含量最高，孔体积更大，杂质种类少，晶体尺寸小，这使其成为最大的Q（O2）（63.74 mL / g）和200摄氏度和1个大气压下的C-Na2S（87.24％）。尽管用Zn-Co改性的脱氧剂Zn / Co-Na2S / AC具有较大的O磅含量，但由于存在更多的杂质CoS2，CoO和NaOH，该脱氧剂的Q（O2）和C-Na2S最低。在其表面具有较大的晶体尺寸。这些杂质阻塞了脱氧剂Zn / Co-Na2S / AC的孔，并抑制了物质的传质和反应物的反应，导致活性下降。当Fe-Co比为0.33 / 1时，脱氧剂Fe / Co（0.33 / 1）-Na2S / AC表现出较高的脱氧活性。

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  • 来源
    《Energy & fuels》 |2019年第7期|6650-6658|共9页
  • 作者

    Zhang Yuhua; Pan Hongyan; Lin Qian; Liu Fuxin; Zhang Guoxiang; Hu Pingfeng;

  • 作者单位

    Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China|Guizhou Key Lab Green Chem & Clean Energy Technol, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China|Guizhou Key Lab Green Chem & Clean Energy Technol, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China|Guizhou Key Lab Green Chem & Clean Energy Technol, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China|Guizhou Key Lab Green Chem & Clean Energy Technol, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China|Guizhou Key Lab Green Chem & Clean Energy Technol, Guiyang 550025, Guizhou, Peoples R China;

    Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China|Guizhou Key Lab Green Chem & Clean Energy Technol, Guiyang 550025, Guizhou, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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