Investigation of performances of commercial diesel oxidation catalysts for $CO,C_3H_6$, andNO oxidation
Investigation of performances of commercial diesel oxidation catalysts for $CO,C_3H_6$, andNO oxidation
Four commercial monolithic diesel oxidation catalysts (DOCs) with two different platinum group metal (PGM) loadings and Pt:Pd ratios of 1:0, 2:1, 3:1 (w/w) were investigated systematically for $CO,C_3H_6$ , and NO oxidation, C$CO,C_3H_6$ co-oxidation, and $CO,C_3H_6$ -NO oxidation reactions via transient activity measurements in a simulated diesel engine exhaust environment. As PGM loading increased, light-off curves shifted to lower temperatures for individual and co-oxidation reactions of CO and $CO,C_3H_6$ . CO and$CO,C_3H_6$ were observed to inhibit the oxidation of themselves and each other. Addition of Pd to Pt was found to enhance CO and $CO,C_3H_6$ oxidation performance of the catalysts while the presence and amount of Pd was found to increase the extent of self-inhibition of NO oxidation. NO inhibited CO and $CO,C_3H_6$oxidation reactions while NO oxidation performance was enhanced in the presence of CO and C3 H6 probably due to the occurrence of reduced Pt and Pd sites during CO and $CO,C_3H_6$ oxidations. The optimum Pt:Pd ratio for individual and cooxidations of $CO,C_3H_6$ , and NO was found to be Pt:Pd = 3:1 (w/w) in the range of experimental conditions investigated in this study.
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- 1. Russell A, Epling WS. Diesel oxidation catalysts. Catalysis Reviews 2011; 53: 337-423. doi: 10.1080/01614940.2011.596429
- 2. Burch R. Knowledge and know-how in emission control for mobile applications. Catalysis Reviews 2004; 46 (3-4): 271-333. doi: 10.1081/ CR-200036718
- 3. Xue E, Seshan K, Ross JRH. Roles of supports, Pt loading and Pt dispersion in the oxidation of NO to $NO_2 and of SO_2 to SO-3$. AppliedCatalysis B: Environmental 1996; 11: 65-79. doi: 10.1016/S0926-3373(96)00034-3
- 4. Hauff K, Tuttlies U, Eigenberger G, Nieken U. A global description of DOC kinetics for catalysts with different platinum loadings and aging status. Applied Catalysis B: Environmental 2010; 100 (1-2): 10-18. doi: 10.1016/j.apcatb.2010.07.036
- 5. Hauff K, Boll W, Tischer S, Chan D, Tuttlies U et al. Macro-and microkinetic simulation of diesel oxidation catalyst: effect of aging, noble metal loading and platinum oxidation. Chem-Ing-Tech 2013; 85 (5): 673-685. doi: 10.1002/cite.201200158
- 6. Morlang A, Neuhausen U, Klementiev KV, Schütze FW, Miehe G et al. Bimetallic Pt/Pd diesel oxidation catalysts: structural characterisation and catalytic behaviour. Applied Catalysis B: Environmental 2005; 60: 191-199. doi: 10.1016/j.apcatb.2005.03.007
- 7. Kaneeda M, Iizuka H, Hiratsuka T, Shinotsuka N, Arai M. Improvement of thermal stability of NO oxidation $Pt/Al_2 O_3$ catalyst by addition of Pd. Applied Catalysis B: Environmental 2009; 90: 564-569. doi:10.1016/j.apcatb.2009.04.011
- 8. Shakya BM, Sukumar B, Lopez-De Jesus YM, Markatou P. The effect of Pt:Pd ratio on heavy-diesel oxidation catalyst performance: an experimental and modeling study. SAE International Journal of Engines 2015; 8 (3): 1271-1282. doi: 10.4271/2015-01-1052
- 9. Kim CH, Schmid M, Schmieg SJ, Tan J, Li W. The effect of Pt-Pd ratio on oxidation catalysts under simulated diesel exhaust. SAE Technical Paper 2011. doi: 10.4271/2011-01-1134
- 10. Hazlett MJ, Moses-Debusk M, Parks II JE, Allard LF, Epling WS. Kinetic and mechanistic study of bimetallic $Pt-Pd/Al_2 O_3$ catalysts for $COand C_3 H_6$ oxidation. Applied Catalysis B: Environmental 2017; 202: 404-417. doi: 10.1016/j.apcatb.2016.09.034
- 11. Daneshvar K, Dadi RK, Luss D, Balakotaiah V, Kang SB et al. Experimental and modeling study of CO and hydrocarbons light-off on various $Pt-Pd/γ-Al_2 O_3$ diesel oxidation catalysts. Chemical Engineering Journal 2017; 323: 347-360. doi: 10.1016/j.cej.2017.04.078
- 12. Kang SB, Kalamaras C, Balakotaiah V, Epling W. Zoning and trapping effects on CO and hydrocarbon light-off in diesel oxidation catalysts. Industrial & Engineering Chemistry Research 2017; 56: 13628-13633. doi: 10.1021/acs.iecr.7b03604
- 13. Kang SB, Hazlett M, Balakotaiah V, Kalamaras C, Epling W. Effect of Pt:Pd ratio on CO and hydrocarbon oxidation. Applied Catalysis B: Environmental 2018; 223: 67-75. doi: 10.1016/j.apcatb.2017.05.057
- 14. Voltz SE, Morgan CR, Liederman D, Jacob SM. Kinetic study of carbon monoxide and propylene oxidation on platinum catalysts. Industrial & Engineering Chemistry Product Research and Development 1973; 12 (4): 294-301. doi: 10.1021/i360048a006
- 15. Khosravi M, Sola C, Abedi A, Hayes RE, Epling WS et al. Oxidation and selective catalytic reduction of NO by propene over Pt and Pt:Pd diesel oxidation catalysts. Applied Catalysis B: Environmental 2014; 147: 264-274. doi: 10.1016/j.apcatb.2013.08.034
- 16. Watling TC, Ahmadinejad M, Ţuţuianu M, Johansson Å, Paterson MAJ. Development and validation of a Pt-Pd diesel oxidation catalyst model. SAE International Journal of Engines 2012; 5 (3): 1420-1442. doi: 10.4271/2012-01-1286
- 17. Hauff K, Tuttlies U, Eigenberger G, Nieken U. Platinum oxide formation and reduction during NO oxidation on a diesel oxidation catalyst – experimental results. Applied Catalysis B: Environmental 2012; 123-124: 107-116. doi: 10.1016/J.APCATB.2012.04.008
- 18. Carlsson PA, Skoglundh M, Fridell E, Jobson E, Andersson B. Induced low temperature catalytic ignition by transient changes in the gas composition. Catalysis Today 2002; 73: 307-313. doi: 10.1016/s0920-5861(02)00014-7
- 19. Carlsson PA, Skoglundh M. Low-temperature oxidation of carbon monoxide and methane over alumina and ceria supported platinum catalysts. Applied Catalysis B: Environmental 2011; 101: 669-675. doi: 10.1016/j.apcatb.2010.11.008
- 20. Dadi RK, Daneshvar K, Luss D, Balakotaiah V, Kalamaras CM et al. Comparison of light-off performance of $Pt-Pd/γ-Al_2 O_3$ dual layer and dual brick diesel oxidation catalysts. Chemical Engineering Journal 2018; 335: 1004-1017. doi: 10.1016/j.cej.2017.10.013
- 21. Hazlett M, Epling WS. Spatially resolving CO and C3H6 oxidation reactions in a $Pt/Al_2O_3$ model oxidation catalyst. Catalysis Today 2016; 267: 157-166. doi: 10.1016/j.cattod.2015.11.033 0920-5861
- 22. Abedi A, Hayes R, Votsmeier M, Epling WS. Inverse hysteresis phenomena during $CO and C_3 H_6$ oxidation over a $Pt/Al_2O_3$ catalyst.Catalysis Letters 2012; 142: 930-935. doi: 10.1007/s10562-012-0861-x
- 23. Khosravi M, Abedi A, Hayes RE, Epling WS, Votsmeier M. Kinetic modelling of Pt and Pt:Pd diesel oxidation catalysts. Applied Catalysis B: Environmental 2014; 154-155: 16-26. doi: 10.1016/j.apcatb.2014.02.001
- 24. Burch R, Breen JP, Meunier FC. A review of the selective reduction of NOx with hydrocarbons under lean-burn conditions with non-zeolitic oxide and platinum group metal catalysts. Applied Catalysis B: Environmental 2002; 39: 283-303. doi: 10.1016/s0926-3373(02)00118-2
- 25. Granger P, Dathy C, Lecomte JJ, Leclercq L, Prigent M et al. Kinetics of the NO and CO reaction over platinum catalysts. Journal of Catalysis 1998; 173: 304-314. doi: 10.1006/jcat.1997.1932
- 26. Boubnov A, Dahl S, Johnson E, Molina AP, Simonsen SB et al. Structure-activity relationships of $Pt/Al_2 O_3$ catalysts for CO and NO oxidation at diesel exhaust conditions. Applied Catalysis B: Environmental 2012; 126: 315-325. doi: 10.1016/j.apcatb.2012.07.029
- 27. AL-Harbi M, Hayes R, Votsmeier M, Epling WS. Competitive NO, CO and hydrocarbon oxidation reactions over a diesel oxidation catalyst. Canadian Journal of Chemical Engineering 2011; 90 (6): 1527-1538. do: 10.1002/cjce.20659.
- 28. Gunes H, Şanlı Yıldız D, Özener B, Hisar G, Rommel S et al. Preparation of $Pt/Al_2 O_3$ and $PtPd/Al_2O_3$ catalysts by supercritical deposition and their performance for oxidation of nitric oxide and propene. Catalysis Today 2020. doi: 10.1016/j.cattod.2020.11.013