东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (6): 908-912.DOI: 10.12068/j.issn.1005-3026.2019.06.027

• 材料与冶金 • 上一篇    

失活钒基催化剂再生-改性用于低负荷烟气脱硝

尚达1,2, 李宝宽1   

  1. (1.东北大学 冶金学院, 辽宁 沈阳110819; 2. 中国能源建设集团 科技发展有限公司, 天津300012)
  • 收稿日期:2018-05-14 修回日期:2018-05-14 出版日期:2019-06-15 发布日期:2019-06-14
  • 通讯作者: 尚达
  • 作者简介:尚达(1986-),吉林松原人,东北大学博士研究生; 李宝宽(1963-),辽宁辽阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51574068).

Regeneration-Modification of Deactivated V2O5-based Catalyst Used for Low Load Condition Denitration

SHANG Da1,2, LI Bao-kuan1   

  1. 1.School of Metallurgy, Northeastern University, Shenyang 110819, China; 2.Science and Technology Development Co., Ltd., China Energy Engineering Group, Tianjin 300012, China.
  • Received:2018-05-14 Revised:2018-05-14 Online:2019-06-15 Published:2019-06-14
  • Contact: LI Bao-kuan
  • About author:-
  • Supported by:
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摘要: 基于电厂失活催化剂,采用物相分析、化学组分测试、比表面积测量表征手段确定导致V2O5/TiO2失活的原因为As2O3、碱金属中毒,而失活催化剂晶型结构没有发生改变且具有高的比表面积.采用0.01mol/L 的H2C2O4溶液和0.015mol/L的NH3·H2O溶液对催化剂进行洗涤再生处理可将催化剂表面SO3,As2O3,K2O和Na2O质量分数分别降至0.09%,0.05%,0.02%和0.01%,重新负载1.5%质量分数V2O5后催化剂活性得以恢复.负载3%质量分数CuO后催化剂表现出好的低温催化活性,220℃, 250℃, 280℃ 和 310℃下V2O5-CuO/TiO2的NOx转化率分别为62.4%, 82.2%, 90.8%和95.5%.

关键词: 失活, 再生, 改性, 低负荷, 钒基催化剂

Abstract: The power plant based deactivated catalyst was characterized by XRD, XRF and BET and the cause of deactivation was determined as As2O3, alkali metal poisoning. However, the crystal structure of the deactivated catalyst did not change and had a high specific surface area. H2C2O4(0.01mol/L) and NH3·H2O(0.015mol/L) was applied to regenerate the catalyst, and the content of SO3, As2O3, K2O and Na2O on the surface of the catalyst could be reduced to 0.09wt.%, 0.05wt.%, 0.02wt.% and 0.01wt.%, respectively. The activity of the catalyst could be recovered after the reloading of 1.5% V2O5. After loading 3wt.% CuO, the catalyst showed good catalytic activity at low temperatures. The NOx conversion rate of V2O5-CuO/TiO2 at 220, 250, 280 and 310℃ was 62.4%, 82.2%, 90.8% and 95.5%, respectively.

Key words: deactivation, regeneration, modification, low load, V2O5-based catalyst

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