采用程序升温表面反应技术研究了H2S在CeO2,TiO2和Al2O3三种载体上的吸附和反应行为.结果表明,CeO2具有最强的脱硫能力.系统研究了预处理气氛对H2S在CeO2上吸附和反应行为.发现CeO2的脱硫能力在惰性气氛、还原性气氛、氧化性气氛中依次增强.H2S首先吸附在经预处理的CeO2表面,进一步在Ar氛围下升温脱附时,一部分H2S在673 K以下脱附,部分则与CeO2表面氧反应,在473 K下产生硫和水,而在473～673 K温度范围内,生成SO2.在673 K以上,所生成的SO2进一步与晶格氧反应,转化成硫酸盐.后者在873 K再次分解为SO2.因此,CeO2表面脱硫过程应控制在673 K以下,可避免复杂的再生过程.
参考文献
| [1] | Han L N;Lv X Y;Wang J C;Chang L P .[J].Energy and Fuels,2012,26:1638. |
| [2] | Carbo M C;Boon J;Jansen D;van Dijk H A J Dijkstra J W van den Brink R W Verkooijen A H M .[J].Int J Greenhouse Gas Control,2009,3:712. |
| [3] | 刘冰,李文钊,徐恒泳.Pt/CexZr1-xO2催化剂在含硫合成气中催化水煤气变换反应活性[J].催化学报,2010(10):1247-1252. |
| [4] | 王琪,郝影娟,陈爱平,杨意泉.热处理对高硫化氢合成气一步法制甲硫醇K_2MoO_4-NiO/SiO_2催化剂结构及性能的影响[J].催化学报,2010(02):242-247. |
| [5] | Krischan J;Makaruk A;Harasek M .[J].Journal of Hazardous Materials,2012,215:49. |
| [6] | Dhage P;Samokhvalov A;Repala D;Duin E C Tatarchuk B J .[J].Physical Chemistry Chemical Physics,2011,133:197. |
| [7] | Flytzani-Stephanopoulos, M;Sakbodin, M;Wang, Z .Regenerative adsorption and removal of H2S from hot fuel gas streams by rare earth oxides[J].Science,2006(5779):1508-1510. |
| [8] | Zheng Y;Kaytakoglu S;Harrison D P .[J].Chemical Engineering Science,2000,55:4893. |
| [9] | Yi K B;Podlaha E J;Harrison D P .[J].Industrial and Engineering Chemistry Research,2005,44:7086. |
| [10] | Kobayashi M;Flytzani-Stephanopoulos M .[J].Industrial and Engineering Chemistry Research,2002,41:3115. |
| [11] | Ma Y C;Ge Q J;Li W Z;Xu H Y .[J].Catalysis Communications,2008,10:6. |
| [12] | Liu B;Goldbach A;Xu H Y .[J].Catalysis Today,2011,171:304. |
| [13] | Chen Y X;Jiang Y;Li W Z;Jin R C Tang S Z Hu W B .[J].Catalysis Today,1999,50:39. |
| [14] | Luo T;Gorte R J .[J].Catalysis Letters,2003,85:139. |
| [15] | Karjalainen H;Lassi U;Rahkamaa-Tolonen K;Kr(o)ger V Keiski R L .[J].Catalysis Today,2005,100:291. |
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