Catalytic Study of Methanol-to-Propylene Conversion over Nano-Sized HZSM-5
Methanol-to-propylene conversion was carried out in a continuous-flow fixed-bed reactor over nano-sized HZSM-5 zeolites. The HZSM-5 catalysts were synthesized with different Si/Al ratio and silicon sources, and treated with NaOH. The structural property, morphology, and acidity of catalysts were measured by XRD, N2 adsorption, FE-SEM, TEM, and NH3-TPD. The results indicate that the increment of Si/Al ratio decreased the acidity of catalysts and then improved propylene selectivity, while silicon sources had slight impact on the acidity but affected the product distribution. The desilication after alkali treatment could increase intracrystalline mesopores and enhance propylene selectivity.
[1] A. Corma, F. Melo, L. Sauvanaud, F. Ortega, "Light cracked naphtha processing: Controlling chemistry for maximum propylene production," Catal. Today, Vol. 107, pp. 699-706, 2005.
[2] X. Zhu, S. Liu, Y. Song, L. Xu, "Catalytic cracking of C4 alkenes to propene and ethene: Influences of zeolites pore structures and Si/Al2 ratios," Appl. Catal. A Gen., Vol. 288, pp. 134-142, 2005.
[3] J. Liu, C. Zhang, Z. Shen, W. Hua, Y. Tang, W. Shen, Y. Yue, H. Xu, "Methanol to propylene: Effect of phosphorus on a high silica HZSM-5 catalyst," Catal. Commun., Vol. 10, pp. 1506-1509, 2009.
[4] U. V. Mentzel, K. T. Højholt, M. S. Holm, R. Fehrmann, P. Beato, "Conversion of methanol to hydrocarbons over conventional and mesoporous H-ZSM-5 and H-Ga-MFI: Major differences in deactivation behavior," Appl. Catal. A Gen., Vol. 417–418, pp. 290-297, 2012.
[5] L. Zhang, Y. Song, G. Li, Q. Zhang, S. Zhang, J. Xu, F. Deng, Y. Gong, "F-assisted synthesis of a hierarchical ZSM-5 zeolite for methanol to propylene reaction: a b-oriented thinner dimensional morphology," RSC Adv., Vol. 5, pp. 61354-61363, 2015.
[6] B. Kaur, R. Srivastava, B. Satpati, "Highly efficient CeO2 decorated nano-ZSM-5 catalyst for electrochemical oxidation of methanol," ACS Catal., Vol. 6, pp. 2654-2663, 2016.
[7] S. Mitchell, M. Boltz, J. Liu, J. Perez-Ramirez, "Engineering of ZSM-5 zeolite crystals for enhanced lifetime in the production of light olefins via 2-methyl-2-butene cracking," Catal. Sci. Technol., Vol. 7, pp. 64-74, 2017.
[8] F. Yaripour, Z. Shariatinia, S. Sahebdelfar, A. Irandoukht, "Effect of boron incorporation on the structure, products selectivities and lifetime of H-ZSM-5 nanocatalyst designed for application in methanol-to-olefins (MTO) reaction," Microporous Mesoporous Mater., Vol. 203, pp. 41-53, 2015.
[9] H. Chen, Y. Wang, F. Meng, H. Li, S. Wang, C. Sun, S. Wang, X. Wang, "Conversion of methanol to propylene over nano-sized ZSM-5 zeolite aggregates synthesized by a modified seed-induced method with CTAB," RSC Adv., Vol. 6, pp. 76642-76651, 2016.
[10] C. Mei, P. Wen, Z. Liu, H. Liu, Y. Wang, W. Yang, Z. Xie, W. Hua, Z. Gao, "Selective production of propylene from methanol: Mesoporosity development in high silica HZSM-5," J. Catal., Vol. 258, pp. 243-249, 2008.
[11] Y. Kim, J.-C. Kim, C. Jo, T.-W. Kim, C.-U. Kim, S.-Y. Jeong, H.-J. Chae, "Structural and physicochemical effects of MFI zeolite nanosheets for the selective synthesis of propylene from methanol," Microporous Mesoporous Mater., Vol. 222, pp. 1-8, 2016.
[12] T. Liang, J. Chen, Z. Qin, J. Li, P. Wang, S. Wang, G. Wang, M. Dong, W. Fan, J. Wang, "Conversion of methanol to olefins over H-ZSM-5 zeolite: reaction pathway is related to the framework aluminum siting," ACS Catal., Vol. 6, pp. 7311-7325, 2016.
[1] A. Corma, F. Melo, L. Sauvanaud, F. Ortega, "Light cracked naphtha processing: Controlling chemistry for maximum propylene production," Catal. Today, Vol. 107, pp. 699-706, 2005.
[2] X. Zhu, S. Liu, Y. Song, L. Xu, "Catalytic cracking of C4 alkenes to propene and ethene: Influences of zeolites pore structures and Si/Al2 ratios," Appl. Catal. A Gen., Vol. 288, pp. 134-142, 2005.
[3] J. Liu, C. Zhang, Z. Shen, W. Hua, Y. Tang, W. Shen, Y. Yue, H. Xu, "Methanol to propylene: Effect of phosphorus on a high silica HZSM-5 catalyst," Catal. Commun., Vol. 10, pp. 1506-1509, 2009.
[4] U. V. Mentzel, K. T. Højholt, M. S. Holm, R. Fehrmann, P. Beato, "Conversion of methanol to hydrocarbons over conventional and mesoporous H-ZSM-5 and H-Ga-MFI: Major differences in deactivation behavior," Appl. Catal. A Gen., Vol. 417–418, pp. 290-297, 2012.
[5] L. Zhang, Y. Song, G. Li, Q. Zhang, S. Zhang, J. Xu, F. Deng, Y. Gong, "F-assisted synthesis of a hierarchical ZSM-5 zeolite for methanol to propylene reaction: a b-oriented thinner dimensional morphology," RSC Adv., Vol. 5, pp. 61354-61363, 2015.
[6] B. Kaur, R. Srivastava, B. Satpati, "Highly efficient CeO2 decorated nano-ZSM-5 catalyst for electrochemical oxidation of methanol," ACS Catal., Vol. 6, pp. 2654-2663, 2016.
[7] S. Mitchell, M. Boltz, J. Liu, J. Perez-Ramirez, "Engineering of ZSM-5 zeolite crystals for enhanced lifetime in the production of light olefins via 2-methyl-2-butene cracking," Catal. Sci. Technol., Vol. 7, pp. 64-74, 2017.
[8] F. Yaripour, Z. Shariatinia, S. Sahebdelfar, A. Irandoukht, "Effect of boron incorporation on the structure, products selectivities and lifetime of H-ZSM-5 nanocatalyst designed for application in methanol-to-olefins (MTO) reaction," Microporous Mesoporous Mater., Vol. 203, pp. 41-53, 2015.
[9] H. Chen, Y. Wang, F. Meng, H. Li, S. Wang, C. Sun, S. Wang, X. Wang, "Conversion of methanol to propylene over nano-sized ZSM-5 zeolite aggregates synthesized by a modified seed-induced method with CTAB," RSC Adv., Vol. 6, pp. 76642-76651, 2016.
[10] C. Mei, P. Wen, Z. Liu, H. Liu, Y. Wang, W. Yang, Z. Xie, W. Hua, Z. Gao, "Selective production of propylene from methanol: Mesoporosity development in high silica HZSM-5," J. Catal., Vol. 258, pp. 243-249, 2008.
[11] Y. Kim, J.-C. Kim, C. Jo, T.-W. Kim, C.-U. Kim, S.-Y. Jeong, H.-J. Chae, "Structural and physicochemical effects of MFI zeolite nanosheets for the selective synthesis of propylene from methanol," Microporous Mesoporous Mater., Vol. 222, pp. 1-8, 2016.
[12] T. Liang, J. Chen, Z. Qin, J. Li, P. Wang, S. Wang, G. Wang, M. Dong, W. Fan, J. Wang, "Conversion of methanol to olefins over H-ZSM-5 zeolite: reaction pathway is related to the framework aluminum siting," ACS Catal., Vol. 6, pp. 7311-7325, 2016.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:77360", author = "Jianwen Li and Hongfang Ma and Weixin Qian and Haitao Zhang and Weiyong Ying", title = "Catalytic Study of Methanol-to-Propylene Conversion over Nano-Sized HZSM-5", abstract = "Methanol-to-propylene conversion was carried out in a continuous-flow fixed-bed reactor over nano-sized HZSM-5 zeolites. The HZSM-5 catalysts were synthesized with different Si/Al ratio and silicon sources, and treated with NaOH. The structural property, morphology, and acidity of catalysts were measured by XRD, N2 adsorption, FE-SEM, TEM, and NH3-TPD. The results indicate that the increment of Si/Al ratio decreased the acidity of catalysts and then improved propylene selectivity, while silicon sources had slight impact on the acidity but affected the product distribution. The desilication after alkali treatment could increase intracrystalline mesopores and enhance propylene selectivity.
", keywords = "Alkali treatment, HZSM-5, methanol-to-propylene, synthesis condition. ", volume = "12", number = "4", pages = "201-4", }
