Conversion of Urea to Cyanamide Over Phosphorus-Modified H-ZSM-5

Shuxiang Lu; Longfu Wang; Yujian Zhang; Minghui Lu; Yahui Zhi; Yajie Tian

doi:10.14233/ajchem.2014.16071

Issue

Vol. 26 No. 14 (2014): Vol 26 Issue 14

Issue Published : July 5, 2014

This work is licensed under a Creative Commons Attribution 4.0 International License.

Conversion of Urea to Cyanamide Over Phosphorus-Modified H-ZSM-5

https://doi.org/10.14233/ajchem.2014.16071

Shuxiang Lu

School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology, Tianjin 300457, P.R. China

Longfu Wang

School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology, Tianjin 300457, P.R. China

Yujian Zhang

School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology, Tianjin 300457, P.R. China

Minghui Lu

School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology, Tianjin 300457, P.R. China

Yahui Zhi

School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology, Tianjin 300457, P.R. China

Yajie Tian

School of Materials Science and Chemical Engineering, Tianjin University of Science and Technology, Tianjin 300457, P.R. China

Corresponding Author(s) : Shuxiang Lu

lshx@tust.edu.cn

Asian Journal of Chemistry, Vol. 26 No. 14 (2014): Vol 26 Issue 14
Article Published : July 5, 2014

Abstract

A novel high active catalyst for the decomposition of urea into cyanamide was developed by treating H-ZSM-5 zeolite with phosphoric acid solution. The catalytic activity of the phosphorous modified H-ZSM-5 was tested in a continuous flow fixed bed reactor at 823 K and atmospheric pressure. The acidity of catalysts, especially Brønsted acid sites, is decreased by phosphorous modification. The selectivity for cyanamide of the catalysts is enhanced by the addition of phosphorus component. These results indicate that the Brønsted acid sites strength is a crucial factor for the selective production of cyanamide.

Keywords

H-ZSM-5 Cyanamide Urea Modification H3PO4

Lu, S., Wang, L., Zhang, Y., Lu, M., Zhi, Y., & Tian, Y. (2014). Conversion of Urea to Cyanamide Over Phosphorus-Modified H-ZSM-5. Asian Journal of Chemistry, 26(14), 4215–4218. https://doi.org/10.14233/ajchem.2014.16071

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K.D. Wehrstedt, W. Wildner, T. Güthner, K. Holzrichter, B. Mertschenk and A. Ulrich, J. Hazard. Mater., 170, 829 (2009); doi:10.1016/j.jhazmat.2009.05.043.

D. Dierolf, S. Scheitza, J. Bonifas and B. Blömeke, Toxicology, 302, 1 (2012); doi:10.1016/j.tox.2012.06.019.

H. Niederhofer, W. Staffen and A. Muir, Alcohol, 38, 50 (2003).

T. Guthner and B. Mertschenk, Cyanamides, Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, edn 7 (2011).

L.G. Boatright and J.S. Mackay, US Patent 2,721,786 (1955).

R. van Hardeveld, T.J. van de Mond and F.H.A.M.J. Vandenbooren, US Patent 4,625,061 (1986).

J. Weitkamp, S. Ernst, H. Rock, K. Scheinost, B. Hammer, W. Goll and H. Michaud, US Patent 5,166,432 (1992).

J. Weitkamp, B. Hammer, W. Goll and H. Rock, DE Patent # 4001805A1 (1991).

W. Yang, Z. Chen, J. Zhou, Z. Huang and K. Cen, Ind. Eng. Chem. Res., 50, 7990 (2011); doi:10.1021/ie200697r.

J.A. Sullivan and O. Keane, Appl. Catal. B, 61, 244 (2005); doi:10.1016/j.apcatb.2005.06.001.

P.M. Schaber, J. Colson, S. Higgins, D. Thielen, B. Anspach and J. Brauer, Thermochim. Acta, 424, 131 (2004); doi:10.1016/j.tca.2004.05.018.

M. Eichelbaum, A.B. Siemer, R.J. Farrauto and M.J. Castaldi, Appl. Catal. B, 97, 98 (2010); doi:10.1016/j.apcatb.2010.03.028.

L. Olsson, H. Sjovall and R.J. Blint, Appl. Catal. B, 87, 200 (2009); doi:10.1016/j.apcatb.2008.09.007.

L.A. Pinck, Ind. Eng. Chem., 17, 459 (1925); doi:10.1021/ie50185a006.

J. Lu and Y. Liu, J. Nat. Gas Chem., 20, 162 (2011); doi:10.1016/S1003-9953(10)60163-6.

K. Ramesh, L. Hui, Y. Han and A. Borgna, Borgna. Catal. Commun., 10, 567 (2009); doi:10.1016/j.catcom.2008.10.034.

J. Schulz and F. Bandermann, Chem. Eng. Technol., 17, 179 (1994); doi:10.1002/ceat.270170306.

N. Xue, X. Chen, L. Nie, X. Guo, W. Ding, Y. Chen, M. Gu and Z. Xie, J. Catal., 248, 20 (2007); doi:10.1016/j.jcat.2007.02.022.

K. Ramesh, C. Jie, Y. Han and A. Borgna, Ind. Eng. Chem. Res., 49, 4080 (2010); doi:10.1021/ie901666f.

C.A. Emeis, J. Catal., 141, 347 (1993); doi:10.1006/jcat.1993.1145.

A. Rahman, G. Lemay, A. Adont and S. Kaliaguine, J. Catal., 112, 453 (1988); doi:10.1016/0021-9517(88)90160-1.

Z. Song, A. Takahashi, I. Nakamura and T. Fujitani, Appl. Catal. A, 384, 201 (2010); doi:10.1016/j.apcata.2010.06.035.

A. Takahashi, W. Xia, I. Nakamura, H. Shimada and T. Fujitani, Appl. Catal. A, 423-424, 162 (2012); doi:10.1016/j.apcata.2012.02.029.

Issue

Vol. 26 No. 14 (2014): Vol 26 Issue 14

Conversion of Urea to Cyanamide Over Phosphorus-Modified H-ZSM-5

Corresponding Author(s) : Shuxiang Lu

Abstract

Keywords

Full Article

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