CO and C₃H₈ total oxidation over Pd catalysts supported on commercial Ce-Zr solid solution: Effects of the calcination temperature and hydrothermal treatment

Abstract

A series of Pd catalysts supported on commercial Ce-Zr solid solution(Pd/CZ) calcined at different temperatures( 750, 900 and 1050 °C) was prepared via an incipient wetness impregnation method. The activities of the fresh and hydrothermally aged Pd/CZ catalysts were tested for total oxidation of CO and C₃H₈. For CO oxidation, the activity of either fresh or aged Pd/CZ catalysts decreased with the elevating of calcination temperature of CZ support, with a fresh catalyst calcined at 750 °C possessing the highest activity and hydrothermal stability. For C₃H₈ total oxidation, the activity of Pd/CZ catalysts could be improved by increasing the calcination temperature of support. However, the aged Pd/CZ catalysts showed higher activity than corresponding fresh Pd/CZ catalysts. The turnover frequency( TOF) over Pd/CZ catalyst for CO oxidation increased with increasing reduction ability of the catalysts, with a fresh catalyst calcined at 750 °C having the highest value(0.27 s⁻¹). However, the TOF of Pd/CZ catalyst for C₃H₈ total oxidation was mainly affected by the size of Pd particles, and large Pd particles possessed a higher activity, with the highest TOF value(0.96 s⁻¹) obtained over an aged catalyst calcined at 1050 °C.

Keywords

Pd/Ce-Zr catalyst / Stability / Turnover frequency / Hydrothermal aging

References

[1] Okal J, Zawadzki M. Appl. Catal. B, 2009, 89: 22.

[2] Atkinson R, Arey J. Chem. Rev., 2003, 103: 4605.

[3] Cao Y D, Ran R, Wu X D, Zhao B, Wan J, Weng D. Appl. Catal. A, 2013, 457: 52.

[4] Osorio G P, Moyado S F, Petranovskii V, Simakov A. Catal. Lett., 2006, 110: 53.

[5] Shen M Q, Yang M, Wang J, Wen J, Zhao M W, Wang W. J. Phys. Chem. C, 2009, 113: 3212.

[6] Wang G, Meng M, Zha Y Q, Ding T. Fuel, 2010, 89: 2244.

[7] Arnby K, Assiks J, Carlsson P, Palmqvist A, Skoglundh M. J. Catal., 2005, 233: 176.

[8] Gaudet J R, Riva A, Peterson E J, Bolin T, Datye A K. ACS Catal., 2013, 3: 846.

[9] Kang S B, Kwon H J, Nam I S, Song Y I, Oh S H. Ind. Eng. Chem. Res., 2011, 50: 5499.

[10] Pan X Q, Zhang Y B, Zhang B, Miao Z Z, Wu T X, Yang X G. Chem. Res. Chinese Universities, 2013, 29(5): 952.

[11] Hietikko M, Lassi U, Kallinend K, Savima A, Pursiainen J, Laitinena R S, Keiski R L. Appl. Catal. A, 2004, 277: 107.

[12] Zhao B, Yang C Q, Wang Q Y, Li G F, Zhou R X. J. Alloy Compd., 2010, 494: 340.

[13] Gao D N, Zhang C X, Wang S, Yuan Z S, Wang S D. Catal. Commun., 2008, 9: 2583.

[14] Yue B H, Zhou R X, Wang Y, Zheng X M. J. Mol. Catal. A: Chem., 2005, 238: 241.

[15] Yang J, Tschamber V, Habermacher D, Garin F, Gilot P. Appl. Catal. B, 2008, 83: 229.

[16] Bozo C, Gaillard F, Guihaume N. Ind. Eng. Chem. Res., 2012, 51: 4875.

[17] Iglesias-Juez A. J. Catal., 2004, 221: 148.

[18] Cassinelli W H, Feio L S F, Araújo J C S, Hori C E, Noronha F B, Marques C M P, Bueno J M C. Catal. Lett., 2007, 120: 86.

[19] Meng L, Jia A P, Lu J Q, Luo L F, Huang W X, Luo M F. J. Phys. Chem. C, 2011, 115: 19789.

[20] He C, Li P, Cheng J, Wang H L, Li J J, Li Q, Hao Z P. Appl. Catal. A, 2010, 382: 167.

[21] Bonarowska M, Pielaszek J, Juszczyk W, Karpiński Z. J. Catal., 2000, 195: 304.

[22] Legawiec-Jarzyna M, Śrbowata A, Juszczyk W, Karpiński Z. Catal. Today, 2004, 88: 93.

[23] Zou Z Q, Meng M, Zha Y Q. J. Phys. Chem. C, 2010, 114: 10.

[24] Luo J Y, Meng M, Zha Y Q, Guo L H. J. Phys. Chem. C, 2008, 112: 8.

[25] Pavlova S N, Sadykov V A, Bulgakov N N, Bredikhin M N. J. Catal., 1996, 161: 517.

[26] Jia A P, Hu G S, Meng L, Xie Y L, Lu J Q, Luo M F. J. Catal., 2012, 289: 199.

[27] Zheng T T, He J J, Zhao Y K, Xia W Z, He J L. J. Rare Earth, 2014, 32: 97.

[28] Castellazzi P, Groppi G, Forzatti P, Baylet A, Marécot P, Duprez D. Catal. Today, 2010, 155: 18.

[29] Otto K, Andino J M, Parks C L. J. Catal., 1991, 131: 243.