对比盐酸、硫酸、硝酸和草酸等几种常规酸对废弃脱硝催化剂活性组分五氧化二钒(V2O5)的提取效果,并考察酸的种类、浓度以及提钒温度对提钒效果的影响.结果表明:盐酸的提钒效果最佳,可将V2O5含量降至0.191％(质量分数),几种酸的提钒效果由大到小的顺序依次为盐酸、草酸、硫酸、硝酸.其次,硫酸的浓度对其提钒量影响最大,浓硫酸的效果是稀硫酸的2.8倍;而处理温度则对草酸的提钒效果影响最为显著,室温下草酸较高温少提取58.4％的V2O5.Uv-vis结果显示:V2O5经盐酸、硫酸以及草酸提取后,在浸渍液中出现(VO)2+的低价钒离子,这有利于提升酸的提钒效果.此外,酸处理对样品的比表面积影响较为显著,经浓草酸处理比表面积可恢复至60.8m2/g,相比原有废弃催化剂的提升39.6％.
参考文献
| [1] | 曾瑞.有关我国SCR废催化剂回收产业的思考[J].中国环保产业,2013(04):55-61. |
| [2] | 刘挥彬;杜浩;刘彪;王少娜;郑诗礼;张懿.KOH 亚熔盐中钒渣的溶出行为[J].中国有色金属学报,2013(4):1129-1139. |
| [3] | 商雪松;陈进生;赵金平;张福旺;徐亚;徐琪.SCR脱硝催化剂失活及其原因研究[J].燃料化学学报,2011(6):465-470. |
| [4] | Moricová, K.;Jóna, E.;Pl?ko, A.;Mojumdar, S.C..Thermal stability of Li_2O-SiO_2-TiO_2 gels evaluated by the induction period of crystallization[J].Journal of thermal analysis and calorimetry,20103(3):817-820. |
| [5] | Young Jin Kim;Hyuk Jae Kwon;In-Sik Nam.High deNOx performance of Mn/TiO2 catalyst by NH3[J].Catalysis Today,20103/4(3/4):244-250. |
| [6] | Choo ST.;Nam IS.;Ham SW.;Lee JB.;Lee YG..Characteristics of V2O5 supported on sulfated TiO2 for selective catalytic reduction of NO by NH3[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,20001/2(1/2):177-188. |
| [7] | 徐海迪;邱春天;张秋林;林涛;龚茂初;陈耀强.WO3对MnOx-CeO2/ZrO2-TiO2整体式催化剂NH3选择性催化还原NOx性能的影响[J].物理化学学报,2010(9):2449-2454. |
| [8] | Pan Li;Qingya Liu;Zhenyu Liu.Behaviors of NH4HSO4 in SCR of NO by NH3 over different cokes[J].Chemical engineering journal,2012:169-173. |
| [9] | Jung Bin Lee;Seong Keun Kim;Dong Wha Kim;Ki Hyung Kim;Sung Nam Chun;Kwang Beom Hur;Sang Mun Jeong.Effect of H_2SO_4 concentration in washing solution on regeneration of commercial selective catalytic reduction catalyst[J].The Korean journal of chemical engineering,20122(2):270-276. |
| [10] | Qichao Li;Zhenyu Liu;Qingya Liu.Kinetics of Vanadium Leaching from a Spent Industrial V2O5/TiO2 Catalyst by Sulfuric Acid[J].Industrial & Engineering Chemistry Research,20148(8):2956-2962. |
| [11] | 张家靓;赵中伟.W（Ⅵ）-V（Ⅴ）-H2O体系钨钒分离的热力学分析[J].中国有色金属学报,2014(6):1656-1662. |
| [12] | Nicolaos V. Economidis;Donovan A. Pena;Panagiotis G. Smirniotis.Comparison of TiO_2-based oxide catalysts for the selective catalytic reduction of NO: effect of aging the vanadium precursor solution[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,19992/3(2/3):123-134. |
| [13] | Khodayari R.;Odenbrand CUI..Regeneration of commercial TiO2-V2O5-WO3SCR catalysts used in bio fuel plants[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,20011/2(1/2):87-99. |
| [14] | Krzysztof Mazurek.Recovery of vanadium, potassium and iron from a spent vanadium catalyst by oxalic acid solution leaching, precipitation and ion exchange processes[J].Hydrometallurgy,2013:26-31. |
| [15] | Li-Yeh Hsu;Hsisheng Teng.Influence of thermal treatment on the catalytic activity of Cu-loaded carbons in NO reduction with NH_3 and regeneration of the thermally deactivated catalysts[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,20031(1):69-76. |
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