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在303,514和543K下用0.8%H2O-99.2%H2对Ni2P/SiO2催化剂进行了水蒸气处理,利用N2吸附-脱附、X射线衍射、电感耦合等离子体发射光谱、H2程序升温脱附及原位漫反射红外光谱等技术对水蒸气处理前后Ni2P/SiO2催化剂的结构进行了表征,并在常压固定床反应器上评价了其催化氯苯加氢脱氯活性.结果表明,经水蒸气处理后,Ni2P/SiO2催化剂的物相及元素组成、Ni2P晶粒大小、比表面积及孔结构没有明显改变.与未处理和303K处理的Ni2P/SiO2催化剂不同,513和543K处理的催化剂表面暴露的Ni中心数量减少,表面P-OH基团数量增多.在513K,氯苯空速3.75ml/(g·h)及H2和氯苯的摩尔比为9.0的反应条件下,经不同温度水蒸气处理的Ni2P/SiO2催化剂上氯苯初始转化率高于93.8%,约是未预处理催化剂的17倍.这可能与金属Ni中心和表面P-OH基团的协同作用有关.

参考文献

[1] Tavoularis G;Keane M A .[J].Journal of Chemical Technology and Biotechnology,1999,74:60.
[2] Suzdorf A R;Morozov S V;Anshits N N;Tsiganova S I Anshits A G .[J].Catalysis Letters,1994,29:49.
[3] Karpinski Z;Early K;d'ltri J L .[J].Journal of Catalysis,1996,164:378.
[4] Aramendía M A;Boráu V;García I M;Jiménez C Lafont F Marinas A Marinas J M Urbano F J .[J].Journal of Catalysis,1999,187:392.
[5] Gómez-Sainero L M;Seoane X L;Fierro J L G;Arcoya A .[J].Journal of Catalysis,2002,209:279.
[6] Feng, J.-T.;Lin, Y.-J.;Evans, D.G.;Duan, X.;Li, D.-Q. .Enhanced metal dispersion and hydrodechlorination properties of a Ni/Al_2O_3 catalyst derived from layered double hydroxides[J].Journal of Catalysis,2009(2):351-358.
[7] Bodnariuk P;Coq B;Ferrat G;Figueras F .[J].Journal of Catalysis,1989,116:459.
[8] Coq B;Ferrat G;Figueras F .[J].Journal of Catalysis,1986,101:434.
[9] Seshu Babu N;Lingaiah N;Vinod Kumar J;Sai Prasad P S .[J].Applied Catalysis A:General,2009,367:70.
[10] 周少君,陈吉祥,刘旭光,张继炎.还原条件对Ni2P/SiO2催化剂催化氯苯气相加氢脱氯反应性能的影响[J].催化学报,2007(06):498-500.
[11] Chen J X;Zhou S J;Ci D H;Zhang J X Wang R J Zhang J Y .[J].Industrial and Engineering Chemistry Research,2009,48:3812.
[12] Chen J X;Chen Y;Yang Q;Li K L Yao C C .[J].Catalysis Communications,2010,11:571.
[13] Li K L;Wang R J;Chen J X .[J].Energy and Fuels,2011,25:854.
[14] Shin E J;Spiller A;Tavoularis G;Keane M A .[J].Physical Chemistry Chemical Physics,1999,1:3173.
[15] Conner W C;Falconer J L .[J].Chemical Reviews,1995,95:759.
[16] Liu, P.;Rodriguez, J.A.;Takahashi, Y.;Nakamura, K. .Water-gas-shift reaction on a Ni_2P(001) catalyst: Formation of oxy-phosphides and highly active reaction sites[J].Journal of Catalysis,2009(2):294-303.
[17] Lee Y K;Oyama S T .[J].Journal of Catalysis,2006,239:376.
[18] Ahsan Md R;Mortuza M G .[J].Journal of Non-Crystalline Solids,2005,351:2333.
[19] Corbridge D E C;Lowe E J.[J].Journal of the Chemical Society,1954:4930.
[20] Duan X;Teng Y;Wang A;Kogan V M Li X Wang Y .[J].Journal of Catalysis,2009,261:232.
[21] Tφpsoe N Y;Tφpsoe H .[J].Journal of Catalysis,1993,139:641.
[22] Ryymin E M;Honkela M L;Viljava T R;Krause A O I .[J].Applied Catalysis A:General,2009,358:42.
[23] Welters W J J;de Beer V H J;van Santen R A .[J].Applied Catalysis A:General,1994,119:253.
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