Preparation of Pt/Al2O3 catalyst and its performance on methanol catalytic combustion at low temperature
-
摘要: 采用一步合成法制备了Al2O3负载Pt催化剂Pt/Al2O3,以甲醇催化燃烧作为目标反应研究了其催化性能,考察了还原剂浓度、表面活性剂用量、表面活性剂浓度和煅烧温度对Pt/Al2O3甲醇低温催化燃烧性能的影响。结果表明,当还原剂浓度为0.1 mol/L、表面活性剂(CTAB)用量为8.53 g/gcat.、表面活性剂浓度为0.1 mol/L、煅烧温度为600℃时,所得催化剂的活性最高,25℃下甲醇催化燃烧的转化率达到52%。而改进一步合成法制备的负载型催化剂Pt/Al2O3具有更高的甲醇催化燃烧活性,25℃下甲醇催化燃烧的转化率为84%。Abstract: Pt/Al2O3 catalysts were prepared by a one step method and the catalytic activity of these catalysts was evaluated by methanol combustion at low temperature. The effects of preparation conditions including the reductant concentration, the surfactant dosage, the surfactant concentration and the calcination temperature were investigated in detail. The results indicated that the catalytic activity was the highest under the conditions of 0.1 mol/L of reductant concentration, 8.53 g/gcat. of surfactant dosage and 600℃ of calcination temperature. The methanol conversion on this kind of catalyst could reach to 52% at 25℃. The modified one step method can improve the catalytic activity further, which could reach up to 84% at 25℃.
-
Key words:
- one step method /
- methanol /
- low temperature /
- catalytic combustion
-
OKAL J, ZAWADZKI M, TYLUS W. Microstructure characterization and propane oxidation over supported Ru nanoparticles synthesized by the microwave-polyol method[J]. Appl Catal B, 2011, 101(3): 548-559. AVGOUROPOULOS G, OIKONOMOPOULOS E, KANISTRAS D, IOANNIDES D. Complete oxidation of ethanol over alkali-promoted Pt/Al2O3 catalysts[J]. Appl Catal B, 2006, 65(1/2): 62-69. LI D, ZHENG Y, WANG X. Effect of phosphoric acid on catalytic combustion of trichloroethylene over Pt/P-MCM-41[J]. Appl Catal A, 2008, 340(1): 33-41. SU X-W, JIN L-Y, LU J-Q, LUO M-F. Pd/Ce0.9Cu0.1O1.9-Y2O3 catalysts for catalytic combustion of toluene and ethyl acetate[J]. J Ind Eng Chem, 2009, 15(5): 683-686. AOUAD S, ABI-AAD E, ABOUKAIS A. Simultaneous oxidation of carbon black and volatile organic compounds over Ru/CeO2 catalysts[J]. Appl Catal B, 2009, 88(3/4): 249-256. PARUS W J, PATERKOWSKI W. Catalytic oxidation of organic pollutants[J]. Pol J Chem Technol, 2009, 11(4): 30-37. DAS D P, PARIDA K M. Mn(III) oxide pillared titanium phosphate (TiP) for catalytic deep oxidation of VOCs[J]. Appl Catal A, 2007, 324: 1-8. TAHIR S F, KOH C A. Catalytic destruction of volatile organic compound emissions by platinum based catalyst[J]. Chemosphere, 1999, 38(9): 2109-2116. WU J C S, FAN Y-C, LIN C-A. Deep oxidation of methanol using a novel Pt/boron nitride catalyst[J]. Ind Eng Chem Res, 2003, 42(14): 3225-3229. 潘相敏, 余瀛, 严菁, 宋小瑜, 马建新. 甲醇制氢系统中燃烧催化剂的研究[J]. 太阳能学报, 2006, 27(8): 841-845. (PAN Xiang-min, YU Ying, YAN Qian, SONG Xiao-yu, MA Jian-xin. Combustion catalyst for methanol fuel processor[J]. Acta Energiae Solaris Sinica, 2006, 27(8): 841-845.) HU Z, BOIADJIEV V, THUNDAT T. Nanocatalytic spontaneous ignition and self-supporting room-temperature combustion[J]. Energy Fuels, 2005, 19(3): 855-858. YANG P, LEE H, HABAS S E, KWESKIN S, BUTCHER D, SOMORJAI G A. Morphological control of catalytically active platinum nanocrystals[J]. Angew Chem Int Ed, 2006, 45(46): 7824-7828. YANG W, WANG X, YANG F,YANG C, YANG X. Carbon nanotubes decorated with Pt nanocubes by a noncovalent functionalization method and their role in oxygen reduction[J]. Adv Mater, 2008, 20(13): 2579-2587. HU X, WANG T, DONG S. Rapid synthesis of cubic Pt nanoparticles and their use for the preparation of Pt nanoagglomerates[J]. J Nanosci Nanotechnol, 2006, 6(7): 2056-2061. LIN C-S, KHAN M R, LIN S D. The preparation of Pt nanoparticles by methanol and citrate[J]. J Colloid Interface Sci, 2006, 299(2): 678-685. LI X, YOU X, YING P, XIAO J, LI C. Some insights into the preparation of Pt/γ-Al2O3 catalysts for the enantioselective hydrogenation of α-ketoesters[J]. Top Catal, 2003, 25(1/4): 63-70.
点击查看大图
计量
- 文章访问数: 1855
- HTML全文浏览量: 28
- PDF下载量: 561
- 被引次数: 0