Study on the Catalytic Oxidation of Ethane in a Million Seconds Contact Time Reactor

Abstract

Abstract: The Pt catalyst samples were prepared by impregnation of αAl2O3 foam monolith. By changing the radio of C2H6/O2, the percentage of N2 and total flow rate, the property of shortcontacttime reforming (SCTR) in a millionseconds was investigated. In addition, direct and indirect oxidation models were discussed by checking the temperature layout in the catalyst monolith. The results show that when enhancing C2H6/O2 ratio and N2 dilution ratio, the selectivity of C2H4 increases (up to 70%) and selectivity of CO and H2 decreases. The contact time affects the selectivity of the products from ethane oxidation, the selectivity of synthesis gas reaches maximum (S（H2）=40%，S（CO）=75%) at the flow rate of 4 L/min. The experimental results prove that SCTR is a combination of homogeneous and heterogeneous reaction.
Key words：

Key words: ethane； short-contact-time reforming （SCTR）, platinum； ethylene； hydrogen

CLC Number:

TQ 517.2

LI Tuo-Nian, LIN He, LUO Tao, HUANG Zhen. Study on the Catalytic Oxidation of Ethane in a Million Seconds Contact Time Reactor[J]. Journal of Shanghai Jiaotong University, 2012, 46(04): 561-566.

References

［1］Hickman D A, Haupfear E A, Schmidt L D. Synthesis gas formation by direct oxidation of methane over Rh monoliths ［J］. Catalysis Letters, 1993, 17(34): 223237.

［2］Hickman D A, Schmidt L D. Production of syngas by direct catalytic oxidation of methane ［J］. Science, 1993, 259(5093): 343346.

［3］Hickman D A, Schmidt L D. Steps in CH4 oxidation on Pt and Rh surfaces: Hightemperature reactor simulations ［J］. Reactor Kinetics and Catalysis, 1993, 39(7): 11641177.

［4］Schmidt L D, Huff M, Bharadwaj S S. Catalytic partial oxidation reactions and reactors ［J］. Chemical Engineering Science, 1994, 49(24A): 39813994.

［5］马立元，张晓宝，李剑，等. 地层条件下天然气扩散过程中地球化学组分变化的模拟实验研究［J］. 石油实验地质, 2004, 26(4）： 365369.

MA Liyuan, ZHANG Xiaobao, LI Jian, et al. Experimental investigation on variation of geochemical compositions of natural gas during diffusion under stratigraphic condition ［J］. Petroleum Geology & Experiment, 2004, 26(4)： 365369.

［6］Huff M, Schmidt L D. Ethylene formation by oxidative dehydrogenation of ethane over monoliths at very short contact times ［J］. Physical Chemistry, 1993, 97: 1181511822.

［7］Huff M, Torniainen P M, Schmidt L D. Partial oxidation of alkanes over noble metal coated monoliths ［J］. Catalysis Today, 1994, 21(1): 113128.

［8］Bodke A S, Olschki D A, Schmidt L D, et al. High selectivities to ethylene by partial oxidation of ethane ［J］. Science, 1999, 285(5428): 712715.

［9］O’Connor R P, Klein E J, Schmidt L D. High yields of synthesis gas by millisecond partial oxidation of higher hydrocarbons ［J］. Catalysis Letters, 2000, 70(34)： 99107.

［10］Cimino S, Donsì F, Russo G, et al. Optimization of ethylene production via catalytic partial oxidation of ethane on PtLaMnO3 catalyst ［J］. Catalysis Letters, 2008, 122: 228237.

［11］Alessandra Beretta, Pio Forzatti. Hightemperature and shortcontacttime oxidative dehydrogenation of ethane in the presence of Pt/Al2O3 and BaMnAl11O19 catalysts ［J］. Journal of Catalysis, 2001, 200: 4558.

［12］Derrick W F, Marylin C H. Oxidative dehydrogenation of ethane over a Ptcoated monolith versus Ptloaded pellets: Surface area and thermal effects ［J］. Journal of Catalysis, 1998, 178: 315327.

［13］Derrick W F, Marlin C H. Acetylene formation during the catalytic oxidative dehydrogenation of ethane over Ptcoated monolishs at short contact times ［J］. Catalysis Letters, 1997, 47: 9197.

［14］Mhadeshwar A B, Vlachos D G. Hierarchical ultiscale mechanism development for methane partial Oxidation and reforming and for thermal decomposition of oxygenates on Rh ［J］. Physical Chemistry, 2005, 109: 1681916835.

［15］Weng W Z, Chen M S, Yan Q G, et al. Mechanistic study of partial oxidation of methane to synthesis gas over supported rhodium and ruthenium catalysts using in situ timeresolved FTIR spectroscopy ［J］. Catalysis Today, 2000, 63(24): 317326.

［16］Mallens E P J, Hoebink J H B J, Marin G B. The reaction mechanism of the partial oxidation of methane to synthesis gas: A transient kinetic study over rhodium and a comparison with platinum ［J］. Journal of Catalysis, 1997, 167: 4356.

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