Effects of SO₂ treatment of commercial catalysts on selective catalytic reduction of NO _x by NH₃

Abstract

Nitrogen oxide(NO _x) emitted from stationary and mobile sources is a major air pollutant. Selective catalytic reduction(SCR) of NO _x over a catalyst is a main technology for NO _x elimination. Catalysts used for practical applications would be deactivated in flue containing SO₂. In this work, three typical commercial catalysts were investigated before and after SO₂ treatment. The catalysts were characterized by X-ray diffraction(XRD), X-ray fluorescene(XRF), temperature programme reduction(TPR), temperature programme desorption(TPD) and diffuse reflectance Fourier transform infrared(DRIFT) techniques. Results showed that SO₂ treatment significantly influenced the performance of V₂O₅/TiO₂ catalyst. The amount of V₂O₅ in the catalyst primarily affected the accumulation of sulfur species in the SO₂ atmosphere. The performance of catalysts with small amounts of V₂O₅ could be improved under the same experimental conditions for acidity enhancement.

Keywords

Selective catalytic reduction / V₂O₅/TiO₂ catalyst / SO₂ treatment

References

[1] Li J. H., Chang H. Z., Ma L., Hao J. M., Yang R. T. Catal. Today, 2011, 175: 147.

[2] Fu M. F., Li C. T., Lu P., Qu L., Zhang M. Y., Zhou Y., Yu M. G., Fang Y. Catal. Sci. Technol., 2014, 4: 14.

[3] Yang S. J., Guo Y. F., Chang H. Z., Ma L., Peng Y., Qu Z., Yan N. Q., Wang C. Z., Li J. H. Appl. Catal. B, 2013, 19: 136.

[4] Shen B. X., Wang Y. Y., Wang F. M., Liu T. Chem. Eng. J., 2014, 236: 171.

[5] Wu Z. B., Jin R. B., Wang H. Q., Liu Y. Catal. Commun., 2009, 10: 935.

[6] Liu J. D., Huang Z. G., Li Z., Guo Q. Q., Li Q. Y. Chem. J. Chinese Universities, 2014, 35(3): 589.

[7] Stanciulescu M., Bulsink P., Caravaggio G., Nossva L., Burich R. Appl. Surf. Sci., 2014, 300: 201.

[8] Chao J. D., He H., Song L. Y., Fang Y. J., Liang Q. M., Zhang G. Z., Qiu W. G., Zhang R. Chem. J. Chinese Universities, 2015, 36(3): 523.

[9] Shan W. P., Song H. Catal. Sci. Technol., 2015, 5: 4280.

[10] Smirniotis P. G., Peña D. A., Uphade B. S. Angew. Chem. Int. Ed., 2001, 40: 2479.

[11] Arfaoui J., Khalfallah Boudali L., Ghorbel A., Delahay G. Catal. Today, 2009, 142: 234.

[12] Hou Y. Q., Huang Z. G., Guo S. J. Catal. Commun., 2009, 10: 1538.

[13] Phil H. H., Reddy M. P., Kumar P. A., Ju L. K., Hyo J. S. Appl. Catal. B, 2008, 78: 301.

[14] Gannoun C., Turki A., Kochkar H., Delaigle R., Eloy P., Ghorbel A., Gaigneaux E. M. Appl. Catal. B, 2014, 147: 58.

[15] Boudali L. K., Ghorbel A., Grange P. C. R. Chimie, 2009, 12: 779e786.

[16] Smirniotis P. G., Sreekanth P. M., Peña D. A., Jenkins R. G. Ind. Eng. Chem. Res., 2006, 45: 6436.

[17] Jung S. M., Grange P. Catal. Today, 2000, 59: 305.

[18] Kwon D. W., Park K. H., Hong S. C. Chem. Engineer. J., 2016, 284: 315.

[19] Zhang Q. M., Song C. L., Lv G., Bin F., Pang H. T., Song J. O. J. Ind. Eng. Chem., 2015, 24: 79.

[20] Yamaguichi T. Appl. Catal., 1990, 61: 1.

[21] Chesalov Y. A., Chernobay G. B., Andrushkevich T. V. J. Mol. Catal. A: Chem., 2013, 373: 96.

[22] Lietti L., Forzatti P., Berti F. Catal. Lett., 1996, 41: 35.

[23] Alemany L. J., Lietti L., Ferlazzo N., Forzatti P., Busca G., Giamello E., Bregani F. J. Catal., 1995, 155: 117.