采用恒pH法和非恒pH法制备了Al2O3掺杂的Pt/WO3/ZrO2催化剂,并用N2吸附-脱附、X射线衍射、紫外-可见漫反射、CO化学吸附、X射线光电子能谱、27Al魔角旋转核磁共振和吡啶吸附红外等技术对催化剂进行了表征.结果表明,相比于非恒pH法制备的催化剂,恒pH法制备的催化剂具有较高的比表面积和Pt分散度,在H2气氛中产生更多的B酸位,从而表现出更高的催化正庚烷临氢异构化反应活性;在200℃和质量空速0.9 h-1的反应条件下,正庚烷转化率达70.0%,明显高于非恒pH法制备的催化剂(43.5%).
参考文献
[1] | Kaufmann T G;Kaldor A;Stuntz G F;Kerby M C Ansell L L .[J].Catalysis Today,2000,62:77. |
[2] | Weyda H;K(o)hler E .[J].Catalysis Today,2003,81:51. |
[3] | Parlitz B.;Zubowa HL.;Eckelt R.;Lieske E.;Lischke G. Fricke R.;Schreier E. .ISOMERIZATION OF N-HEPTANE OVER PD-LOADED SILICO-ALUMINO-PHOSPHATE MOLECULAR SIEVES[J].Journal of Catalysis,1995(1):1-11. |
[4] | Liu P;Zhang X G;Yao Y;Wang J .[J].Applied Catalysis A:General,2009,371:142. |
[5] | Miyaji A;Ohnishi R;Okuhara T .[J].Applied Catalysis A:General,2004,262:143. |
[6] | Fottinger K;Zorn K;Vinek H .Influence of the sulfate content on the activity of Pt containing sulfated zirconia[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):69-75. |
[7] | lglesia E;Barton D G;Soled S L;Miseo S Baumgartner J E Gates W E Fuentes G A Meitzner G D .[J].Stud SurfSci Catal,1996,101:533. |
[8] | Jermy B R;Khurshid M;Al-Daous M A;Hattori H Al-Khattaf S S .[J].Catalysis Today,2011,164:148. |
[9] | Kauck(y) D;Wichtedová B;Dedecek J;Sobalik Z Jakubec I .[J].Applied Catalysis A:General,2011,397:82. |
[10] | Akhmedov VM;Al-Khowaiter SH .Recent advances and future aspects in the selective isomerization of high n-alkanes[J].Catalysis Reviews. Science and Engineering,2007(1):33-139. |
[11] | Arribas MA.;Martinez A.;Marquez F. .Activity, selectivity, and sulfur resistance of Pt/WOx-ZrO2 and Pt/Beta catalysts for the simultaneous hydroisomerization of n-heptane and hydrogenation of benzene[J].Journal of Catalysis,2000(2):309-319. |
[12] | 汪颖军,张海菊,孙博,田性刚.正庚烷异构化双功能催化剂的研究进展[J].石油化工,2008(09):960-966. |
[13] | Iglesia E;Soled S L;Kramer G M .[J].Journal of Catalysis,1993,144:238. |
[14] | HuaW M;Sommer J .[J].Applied Catalysis A:General,2002,232:129. |
[15] | Xu J S;Ying J Y;Angew Chem .[J].Int Ed,2006,45:6700. |
[16] | Liu Y;Guan Y J;Li C;Lian J Gan G J Lim E C Kooli F .[J].J Gatal,2006,244:17. |
[17] | 涂兴珺,乐英红,王捷,翟德伟,华伟明,高滋.Ga2O3对Pt/WO3/ZrO2催化剂上正庚烷异构化反应的促进作用[J].催化学报,2009(05):378-380. |
[18] | Nie Y Y;Shang S N;Xu X;Hua W M Yue Y H Gao Z .[J].Applied Catalysis A:General,2012,433-434:69. |
[19] | Barton D;Shtein M;Wilson R;Soled S Iglesia E .[J].Journal of Physical Chemistry B,1999,103:630. |
[20] | Wong S T;Li T;Cheng S;Lee J F Mou C Y .[J].Journal of Catalysis,2003,215:45. |
[21] | Xia Q H;Hidajat K;Kawi S .[J].Journal of Catalysis,2002,205:318. |
[22] | Shishido T.;Hattori H. .HYDROGEN EFFECTS ON CUMENE CRACKING OVER ZIRCONIUM OXIDE PROMOTED BY SULFATE ION AND PLATINUM[J].Journal of Catalysis,1996(1):194-197. |
[23] | Triwahyono S;Jalil A A;Hattori H .[J].Journal of Natural Gas Chemistry,2007,16:252. |
[24] | Ebitani K;Tsuji J;Hattori H;Kita K .[J].Journal of Catalysis,1992,135:609. |
[25] | García-Gutiérrez J L;Cano J L;Alemán-Vázquez L O;Jiménez-Cruz F .[J].Fuels,2012,94:532. |
[26] | Barton D G;Soled S L;Meitzner G D;Fuentes G A Iglesia E .[J].Journal of Catalysis,1999,181:5. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%