Dual-templated synthesis of Si-rich [B]-ZSM-5 for high selective light olefins production from methanol

Document Type : Original research

Authors

1 Faculty of Chemical Engineering, Sahand University of Technology, Sahand New Town, Tabriz, Iran, P.O. Box: 51335-1996

2 Research Center of Environmental Engineering, Sahand University of Technology, Sahand New Town, Tabriz, Iran, P.O. Box: 51335-1996

Abstract

Methanol dehydration is a high potential route for the production of light olefins (C2-C4). In this study, hierarchical Si-rich [B]-ZSM-5 catalysts (Si/Al= 200) were prepared through one-pot hydrothermal synthesis, including boron as a promoter and ethanol as a low-cost secondary template. N2 adsorptiondesorption, XRD, FE-SEM, and FT-IR techniques were applied to characterize the catalysts. The effect of different amounts of ethanol and different operating conditions was studied on the ZSM-5 catalyst preparation and performance in methanol-to-olefins (MTO) reaction. The results showed that the optimum amount of ethanol (ethanol/TPABr=5) led to the highest crystallinity (91.2%), the highest specific surface area (>400 m2g-1), and total pore volume (0.19 cm3g-1). The best catalytic performance was obtained at temperature of 480°C and methanol hourly space velocity (WHSV) of 7.2 h-1. The optimum catalyst had the highest propylene selectivity (58%) and light olefin selectivity (85%). The results proved the high capability of the new strategy for the efficient and fast development of the MTO catalyst.

Keywords

Main Subjects

References

  1. Galadima A, Muraza O (2015) Recent developments on silicoaluminates and silicoaluminophosphates in the methanol-to-propylene reaction: A mini review. Ind Eng Chem Res 54: 4891-4905
  2. Ali MA, Ahmed S, Al-Baghli N, Malaibari Z, Abutaleb A, Yousef A (2019) A comprehensive review covering conventional and structured catalysis for methanol to propylene conversion. Catal Lett 149: 3395-3424
  3. Gorzin F, Darian JT, Yaripour F, Mousavi SM (2019) Novel hierarchical HZSM-5 zeolites prepared by combining desilication and steaming modification for converting methanol to propylene process. J Porous Mater 26: 1407- 1425
  4. Taniguchi T, Yoneta K, Nakaoka S, Nakasaka Y, Yokoi T, Tago T, Masuda T (2016) Methanol conversion reaction over MFI ferroaluminosilicate nano crystal. Catal Lett 146: 442-451
  5. Ahmadpour J, Taghizadeh M (2015) Catalytic conversion of methanol to propylene over high-silica mesoporous ZSM-5 zeolites prepared by different combinations of mesogenous templates. J Nat Gas Sci Eng 23: 184-194
  6. Wang X, Chen H, Meng F, Gao F, Sun C, Sun L, Wang S, Wang L, Wang Y (2017) CTAB resulted direct synthesis and properties of hierarchical ZSM-11/5 composite zeolite in the absence of template. Micropor Mesopor Mat 243: 271-280
  7. Li H, Li X-G, Xiao W-D (2020) Collaborative effect of zinc and phosphorus on the modified HZSM-5 zeolites in the conversion of methanol to aromatics. Catal Lett 151: 955–965
  8. Zhu H, Liu Z, Kong D, Wang Y, Yuan X, Xie Z (2009) Synthesis of ZSM-5 with intracrystal or intercrystal mesopores by polyvinyl butyral templating method. J Colloid Interface Sci 331: 432-438
  9. Aziz A, Kim KS (2015) Investigation of tertiary butyl alcohol as template for the synthesis of ZSM-5 zeolite. J Porous Mater 22: 1401-1406
  10. Ma T, Zhang L, Song Y, Shang Y, Zhai Y, Gong Y (2018) A comparative synthesis of ZSM-5 with ethanol or TPABr template: distinction of Brønsted/Lewis acidity ratio and its impact on n-hexane cracking. Catal Sci Technol 8: 1923- 1935
  11.  Zhang D, Wang R, Yang X (2009) Application of fractional factorial design to ZSM-5 synthesis using ethanol as template. Micropor Mesopor Mat 126: 8-13
  12. Sacchetto V, Olivas Olivera DF, Paul G, Gatti G, Braschi I, Marchese L, Bisio C (2017) On the adsorption of gaseous mixtures of hydrocarbons on high silica zeolites. J Phys Chem C 121: 6081-6089
  13. Ali M.A., Brisdon B., Thomas W.J., (2003) Synthesis, characterization and catalytic activity of ZSM-5 zeolites having variable silicon-to-aluminum ratios. Appl Catal A, 252, 149-162
  14. Shirazi L, Jamshidi E, Ghasemi MR (2008) The effect of Si/Al ratio of ZSM-5 zeolite on its morphology, acidity and crystal size. Cryst Res Technol 43: 1300-1306
  15. Rostamizadeh M, Yaripour F, Hazrati H (2018) High efficient mesoporous HZSM-5 nanocatalyst development through desilication with mixed alkaline solution for methanol to olefin reaction. J Porous Mater 25: 1287-1299
  16. Rostamizadeh M, Yaripour F, Hazrati H (2018) Selective production of light olefins from methanol over desilicated highly siliceous ZSM- 5 nanocatalysts. Polyolefins J 5: 59-70
  17. Adel Niaei H, Rostamizadeh M (2020) Adsorption of metformin from an aqueous solution by Fe- ZSM-5 nano-adsorbent: Isotherm, kinetic and thermodynamic studies. J Chem Thermo 142: 106003
  18. Mohebbi S, Rostamizadeh M, Kahforoushan D (2020) Effect of molybdenum promoter on performance of high silica MoO3/B-ZSM-5 nanocatalyst in biodiesel production. Fuel 266: 117063
  19. Mohebbi S, Rostamizadeh M, Kahforoushan D (2020) Efficient sulfated high silica ZSM-5 nanocatalyst for esterification of oleic acid with methanol. Micropor Mesopor Mat 294: 109845
  20. Svelle S, Olsbye U, Joensen F, Bjørgen M (2007) Conversion of methanol to alkenes over medium- and large-pore acidic zeolites: Steric manipulation of the reaction intermediates governs the ethene/propene product selectivity. J Phys Chem C 111: 17981-17984
  21. Rostamizadeh M, Jalali H, Naeimzadeh F, Gharibian S (2019) Efficient removal of diclofenac from pharmaceutical wastewater using impregnated zeolite catalyst in heterogeneous fenton process. Phys Chem Res 7: 37-52
  22. Zhu Q, Kondo JN, Setoyama T, Yamaguchi M, Domen K, Tatsumi T (2008) Activation of hydrocarbons on acidic zeolites: Superior selectivity of methylation of ethene with methanol to propene on weakly acidic catalysts. Chem Commun 41: 5164-5166
  23. Wang C, Xu J, Qi G, Gong Y, Wang W, Gao P, Wang Q, Feng N, Liu X, Deng F (2015) Methylbenzene hydrocarbon pool in methanol-to-olefins conversion over zeolite H-ZSM-5. J Catal 332: 127-137
  24. Sedighi M, Towfighi J (2015) Methanol conversion over SAPO-34 catalysts; Systematic study of temperature, space–time, and initial gel composition on product distribution and stability. Fuel 153: 382-392
  25. Schulz H (2018) About the mechanism of methanol conversion on zeolites. Catal Lett 148: 1263-1280
  26. Zhang M, Xu S, Wei Y, Li J, Wang J, Zhang W, Gao S, Liu Z (2016) Changing the balance of the MTO reaction dual-cycle mechanism: Reactions over ZSM-5 with varying contact times. Chin J Catal 37: 1413-1422
  27. Hajimirzaee S, Ainte M, Soltani B, Behbahani RM, Leeke GA, Wood J (2015) Dehydration of methanol to light olefins upon zeolite/alumina catalysts: Effect of reaction conditions, catalyst support and zeolite modification. Chem Eng Res Des 93: 541-553
  28. Zhang J, Xu L, Zhang Y, Huang Z, Zhang X, Zhang X, Yuan Y, Xu L (2018) Hydrogen transfer versus olefins methylation: On the formation trend of propene in the methanol-to-hydrocarbons reaction over Beta zeolites. J Catal 368: 248-260
  29. Yaripour F, Shariatinia Z, Sahebdelfar S, Irandoukht A (2015) Conventional hydrothermal synthesis of nanostructured H-ZSM-5 catalysts using various templates for light olefins production from methanol. J Nat Gas Sci Eng 22: 260-269
  30. Jiao Y, Jiang C, Yang Z, Liu J, Zhang J (2013) Synthesis of highly accessible ZSM-5 coatings on SiC foam support for MTP reaction. Micropor Mesopor Mat 181: 201-207
  31. Mei C, Wen P, Liu Z, Liu H, Wang Y, Yang W, Xie Z, Hua W, Gao Z (2008) Selective production of propylene from methanol: Mesoporosity development in high silica HZSM-5. J Catal 258: 243-249
  32. Zhang S, Gong Y, Zhang L, Liu Y, Dou T, Xu J, Deng F (2015) Hydrothermal treatment on ZSM- 5 extrudates catalyst for methanol to propylene reaction: Finely tuning the acidic property. Fuel Process Technol 129: 130-138
  33. Zhang Y, Zhu K, Duan X, Li P, Zhou X, Yuan W (2014) Synthesis of hierarchical ZSM-5 zeolite using CTAB interacting with carboxyl-ended organosilane as a mesotemplate. RSC Adv 4: 14471-14474

Files

Cited by

History

  • Receive Date: 20 February 2021
  • Revise Date: 07 April 2021
  • Accept Date: 10 April 2021
  • First Publish Date: 10 April 2021

Share

How to cite

Statistics