| 邢帅.椰壳活性炭氧化后负载硅基复合氧化物低温脱硝催化剂的研究[J].分子催化,2016,30(2):140-150 |
| 椰壳活性炭氧化后负载硅基复合氧化物低温脱硝催化剂的研究 |
| Research of silicon-based composite oxides supported on oxided cocount shell active carbon as denitration catalyst at low temperature |
| 投稿时间：2016-01-11 修订日期：2016-03-06 |
| DOI： |
| 中文关键词: 低温脱硝 活性炭 浸渍法 SiO2 |
| 英文关键词:denitration at low temperature active carbon impregnation SiO2 |
| 基金项目: |
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| 摘要点击次数: 1512 |
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| 中文摘要: |
| 椰壳活性炭经硝酸氧化处理后做载体，采用浸渍法负载含SiO2的复合氧化物，用做低温脱硝催化剂。在锰氧化物中添加TiO2, 可以提高催化剂的抗硫性能，但低温脱硝活性降低。然而在锰氧化物中添加SiO2，不仅提高了催化剂的抗硫性能，而且也提高了脱硝活性。TEM结果表明加入SiO2可以有效的减小复合氧化物晶粒尺寸，更提高了其在载体上的分散度。XPS分析发现加入SiO2还增大了催化剂中Mn4 的相对含量。此外，经硝酸氧化处理过的椰壳活性炭，表面含氧基团增加，从而也大大提高了对NH3及NO的吸附容量。在相同脱硝条件下，与原料活性炭负载的催化剂比较，硝酸氧化处理后的活性炭负载的催化剂具有更高的脱硝效率。 |
| 英文摘要: |
| The cocount shell active carbon (AC) was pretreated with nitric acid, and supported the SiO2 containing composite oxides by impregnation for denitration at low temperature. The introduction of TiO2 in manganese oxide enhanced the resistance to SO2, but decreased the denitration activity at low temperature. Comparatively, addition of SiO2 in the oxides inproved not only the resistance to SO2 but also the denitration activity. TEM images indicated that SiO2 might effectively reduce the crystal size of the composite oxides and improve the dispersion on the carrier surface. Moreover, XPS results revealed that the relative content of Mn4 in the oxides was increased as well. In addition, pretreating with nitric acid greatly increased the contents of the oxygen-containing groups on the AC surface, which would benefit the adsorption of NH3 and NO. Under the same denitration conditions, the oxided AC supported oxides exhibited higher denitration activities compared to those of the raw AC supported ones. |
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