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Zeolites as Catalyst Supports for Hydrocarbon Oxidation Reactions
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Catalytic oxidation is a key technology for the conversion of petroleum-based feedstocks into useful chemicals (e.g., adipic acid, caprolactam, glycols, acrylates, and vinyl acetate) since this chemical transformation is always involved in synthesis processes. Zeolites are microporous, crystalline aluminosilicate materials known since 1756 when the stilbite structure was identified by the Swedish mineralogist Crönstedt. Zeolites and other related porous materials can be supports for organometallic or metallic active species. These materials are the most studied supports due to their combined properties of mechanical and thermal stability that allows it an easy regeneration and recycling. 

hydrocarbon oxidation reactions zeolites hierarchical zeolites immobilized catalyst
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Entry Collection: Organic Synthesis
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    1. Industrial Hydrocarbon Oxidation Reactions

    Catalytic oxidation reactions are of high industrial relevance since many important commodities have synthesis paths involving oxidation. To understand their relevance, it can just refer to adipic acid, with a global production of over 4 million tons and expect to exceed a $8 billion USD global market by 2025 [1].
    When addressing hydrocarbon oxidation reactions, there are several significant industrial applications. The direct oxidation of alkanes is an attractive alternative to oxidation via olefins; however, only two industrial processes have been implemented, and other alkanes oxidations are only at the research or pilot plant status. One of these reactions is the production of maleic anhydride from n-butane (Figure 1).
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    Figure 1. Maleic anhydride synthesis from n-butane oxidation.
    This process uses supported (VO)2P2O7 as heterogenous catalyst and achieves high weight yields (ca. 95%) replacing a previous method with benzene. In both methods, butane (or benzene) is fed into a stream of hot air, and the mixture passes through a catalyst bed at high temperature. Fixed, fluidized, and transport bed reactors technologies have been implemented in different industrial plants to address different technical difficulties [2].
    Another example of alkane oxidation but in the liquid phase with homogeneous catalysis is the oxidation of cyclohexane into a mixture of cyclohexanol and cyclohexanone (also known as KA oil), which are intermediates in the manufacture of nylon-6 and nylon-6,6. KA oil is mainly obtained through the oxidation of cyclohexane using air or peroxide as the oxidant agent. In the present industrial conditions, liquid phase oxidation of cyclohexane is achieved at about 165 °C and O2 pressures of 8–15 bar in the presence of manganese or cobalt naphthenates as catalysts (Figure 2). To avoid oxidative side reactions, a short retention time is used to assure 80–85% selectivity; thus, the conversion is limited to 10–11% per cycle, requiring separation and refeeding of the unconverted cyclohexane. Additionally, the currently used homogeneous catalysts are difficult to separate from the reaction media, leading to serious environmental pollution. [3]

    References

    1. Rios, J.; Lebeau, J.; Yang, T.; Li, S.; Lynch, M.D. A critical review on the progress and challenges to a more sustainable, cost competitive synthesis of adipic acid. Green Chem. 2021, 23, 3172–3190.
    2. Clerici, M.G.; Ricci, M.S.G. Formation of C-O bonds by oxidation. In Metal-Catalysis in Industrial Organic Processes; Gian Paolo Chiusoli, P.M.M., Ed.; Royal Society of Chemistry: London, UK, 2006; pp. 23–78.
    3. Martins, L.M.D.R.S. Catalytic oxidation of alkanes to high-added value products: The role of C-Scorpionate metal complexes. In Alkanes, Properties, Production and Applications; Martins, L.M.D.R.S., Ed.; Nova Science Publishers: New York, NY, USA, 2019; pp. 69–92.
    4. Ullmann’s Encyclopedia of Industrial Chemistry; Wiley, VCH: Weinheim, Germany, 2002.
    5. Li, Y.; Yu, J. New stories of zeolite structures: Their descriptions, determinations, predictions, and evaluations. Chem. Rev. 2014, 114, 7268–7316.
    6. Ribeiro, F.R.; Guisnet, M. Les Zeolithes: Un Nanomonde au Service de la Catalyse; EDP Science: Les Ullis, France, 2006.
    7. Chen, N.Y.; Garwood, W.E.; Dwyer, F.G. Shape Selective Catalysis in Industrial Applications, 2nd ed.; Dekker, M., Ed.; CRC Press: New York, NY, USA, 1996.
    8. Schwieger, W.; Machoke, A.G.; Weissenberger, T.; Inayat, A.; Selvam, T.; Klumpp, M.; Inayat, A. Hierarchy concepts: Classification and preparation strategies for zeolite containing materials with hierarchical porosity. Chem. Soc. Rev. 2016, 45, 3353–3376.
    9. Beck, J.S.; Vartuli, J.C.; Roth, W.J.; Leonowicz, M.E.; Kresge, C.T.; Schmitt, K.D.; Chu, C.T.W.; Olson, D.H.; Sheppard, E.W.; McCullen, S.B.; et al. A New Family of Mesoporous Molecular Sieves Prepared with Liquid Crystal Templates. J. Am. Chem. Soc. 1992, 114, 10834–10843.
    10. Trong On, D.; Desplantier-Giscard, D.; Danumah, C.; Kaliaguine, S. Perspectives in catalytic applications of mesostructured materials. Appl. Catal. A Gen. 2001, 222, 299–357.
    11. Mandal, S.; Sinhamahapatra, A.; Rakesh, B.; Kumar, R.; Panda, A.; Chowdhury, B. Synthesis, characterization of Ga-TUD-1 catalyst and its activity towards styrene epoxidation reaction. Catal. Commun. 2011, 12, 734–738.
    12. Meoto, S.; Kent, N.; Nigra, M.M.; Coppens, M.O. Effect of stirring rate on the morphology of FDU-12 mesoporous silica particles. Microporous Mesoporous Mater. 2017, 249, 61–66.
    13. Kishor, R.; Ghoshal, A.K. Understanding the hydrothermal, thermal, mechanical and hydrolytic stability of mesoporous KIT-6: A comprehensive study. Microporous Mesoporous Mater. 2017, 242, 127–135.
    14. Patcas, F.C. The methanol-to-olefins conversion over zeolite-coated ceramic foams. J. Catal. 2005, 231, 194–200.
    15. Mitra, B.; Kunzru, D. Washcoating of different zeolites on cordierite monoliths. J. Am. Ceram. Soc. 2008, 91, 64–70.
    16. Ivanova, S.; Louis, B.; Madani, B.; Tessonnier, J.P.; Ledoux, M.J.; Pham-Huu, C. ZSM-5 coatings on β-SiC monoliths: Possible new structured catalyst for the methanol-to-olefins process. J. Phys. Chem. C 2007, 111, 4368–4374.
    17. Louis, B.; Ocampo, F.; Yun, H.S.; Tessonnier, J.P.; Pereira, M.M. Hierarchical pore ZSM-5 zeolite structures: From micro- to macro-engineering of structured catalysts. Chem. Eng. J. 2010, 161, 397–402.
    18. Barg, S.; Soltmann, C.; Schwab, A.; Koch, D.; Schwieger, W.; Grathwohl, G. Novel open cell aluminum foams and their use as reactive support for zeolite crystallization. J. Porous Mater. 2011, 18, 89–98.
    19. Qian, X.; Du, J.; Li, B.; Si, M.; Yang, Y.; Hu, Y.; Niu, G.; Zhang, Y.; Xu, H.; Tu, B.; et al. Controllable fabrication of uniform core-shell structured composites. Chem. Sci. 2011, 2, 2006–2016.
    20. Qian, X.; Che, R.; Asiri, A.M. Exploring Meso-/Microporous Composite Molecular Sieves with Core-Shell Exploring Meso-/Microporous Composite Molecular Sieves with Core—Shell. Chem. Eur. J. 2012, 18, 931–939.
    21. Lv, Y.; Qian, X.; Tu, B.; Zhao, D. Generalized synthesis of core-shell structured mesoporous silica composites. Catal. Today 2013, 204, 2–7.
    22. Xu, L.; Peng, H.G.; Zhang, K.; Wu, H.; Chen, L.; Liu, Y.; Wu, P. Core-shell-structured titanosilicate as a robust catalyst for cyclohexanone ammoximation. ACS Catal. 2013, 3, 103–110.
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    View Times: 248
    Entry Collection: Organic Synthesis
    Revisions: 3 times (View History)
    Update Date: 25 Mar 2022
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      Martins, A. Zeolites as Catalyst Supports for Hydrocarbon Oxidation Reactions. Encyclopedia. Available online: https://encyclopedia.pub/entry/20853 (accessed on 07 February 2023).
      Martins A. Zeolites as Catalyst Supports for Hydrocarbon Oxidation Reactions. Encyclopedia. Available at: https://encyclopedia.pub/entry/20853. Accessed February 07, 2023.
      Martins, Angela. "Zeolites as Catalyst Supports for Hydrocarbon Oxidation Reactions," Encyclopedia, https://encyclopedia.pub/entry/20853 (accessed February 07, 2023).
      Martins, A. (2022, March 22). Zeolites as Catalyst Supports for Hydrocarbon Oxidation Reactions. In Encyclopedia. https://encyclopedia.pub/entry/20853
      Martins, Angela. ''Zeolites as Catalyst Supports for Hydrocarbon Oxidation Reactions.'' Encyclopedia. Web. 22 March, 2022.
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