Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

The Effect of Zeolites on the Catalytic Performance of Pt/(13X, HY & HZSM-5)-HMS Micro/Mesoporous Composites in the Selective Isomerization Process of Normal Heptane

Document Type : Research Article

Author
Nastaran Parsafard
Department of Applied Chemistry, Kosar University of Bojnord , Bojnord, I.R. IRAN
Abstract
With growing concerns about environmental pollution, the oil industry has begun to look for ways to reduce fuel pollution. Catalytic isomerization is a method in which the fuel octane number is increased without producing air pollutants. In the present work, three composite catalysts with one mesoporous silica and zeolite sections were prepared and used in the normal heptane isomerization reaction in the temperature range of 200-350 °C. The catalysts were identified using various tests such as XRD, XRF, UV-Vis DRS, nitrogen adsorption-desorption, FT-IR, NH3-TPD, and TG/DTA. The kinetics of this reaction was also investigated using two models the power law and the Langmuir-Hinshelwood. According to the obtained results, the Pt/XH catalyst showed the highest reaction yield (23.9%) and selectivity to isomerization products (51.8%) and the Langmuir-Hinshelwood model presented the best correlation (more than 0.9) with the experimental data.
Keywords
Normal heptane isomerization
Zeolite
Kinetics
Power law model
Langmuir-Hinshelwood model

Subjects

[1] Naranov E.R., Sadovnikov A.A., Maximov A.L., Karakhanov E.A., Development of Micro-Mesoporous Materials with Lamellar Structure as the Support of NiW Catalysts, Microporous Mesoporous Mater., 263: 150-157 (2018).
[2] Peyrovi M. H., Parsafard N., Peyrovi P., Influence of Zirconium Addition in Platinum–Hexagonal Mesoporous Silica (Pt-HMS) Catalysts for Reforming of n-Heptane, Ind. Eng. Chem. Res., 53(37): 14253-14262 (2014).
[3] Moein M., Conversion of n-Heptane on Pt/Al2O3 Catalyst, Iran. J. Chem. Chem. Eng. (IJCCE), 13(2): 104-114 (1994).
[4] Lyu Y., Liu Y., Xu L., Zhao X., Liu Z., Liu X., Yan Z., Effect of Ethanol on the Surface Properties and n-Heptane Isomerization Performance of Ni/SAPO-11, Appl. Surf. Sci., 401: 57-64 (2017).
[5] de la Fuente N., Wang J.A., Chen L.F., González J., Salmones J., Contreras J.L., Navarrete J., Skeletal Isomerization of n-Heptane with Highly Selective Pt/H3PW12O40/SBA–15 Trifunctional Catalysts, Catal. Commun., 102: 93-97 (2017).
[6] Yang W., Huang T., Zhou J., Zhou M., Wang Z., Liu J., Cen K., Dimensional Effect on Self-Sustaining Catalytic Combustion of n-Heptane in Micro/Meso Tubes, Energy Fuels., 30(7): 6110-6116 (2016).
[7] Zhu H., Ramanathan A., Wu J.F., Subramaniam B., Genesis of Strong Brønsted Acid Sites in WZr-KIT-6 Catalysts and Enhancement of Ethanol Dehydration Activity, ACS Catal., 8(6): 4848-4859 (2018).
[8] De Rossi S., Ferraris G., Valigi M., Gazzoli D., WOx/ZrO2 Catalysts: Part 2. Isomerization of n-Butane, Appl. Catal. A Gen., 231(1-2): 173-184 (2002).
[9] Bailleul S., Yarulina I., Hoffman A.E., Dokania A., Abou-Hamad E., Chowdhury A.D., Pieters G., Hajek J., De Wispelaere K., Waroquier M., Gascon J., A Supramolecular View on the Cooperative Role of Brønsted and Lewis Acid Sites in Zeolites for Methanol Conversion, J. American Chem. Soc., 141(37): 14823-14842 (2019).
[10] Wu Y., Li C., Bai J., Wang J., The Fabrication of Porous 4A-Zeolite-Supported Ag Nanoparticles Catalysts and Its Catalytic Activity for Styrene Epoxidation, Results Phys., 7: 1616-1622 (2017).
[11] Pourhasan‐Kisomi R., Shirini F., Golshekan M., Introduction of Organic/Inorganic Fe3O4@MCM-41@Zr‐Piperazine Magnetite Nanocatalyst for the Promotion of the Synthesis of Tetrahydro‐4H‐Chromene and Pyrano [2, 3‐d] Pyrimidinone Derivatives, Appl. Organometal. Chem., 32(7): e4371 (2018).
[12] Timofeeva M.N., Acid Catalysis by Heteropoly Acids, Appl. Catal. A Gen., 256(1-2): 19-35 (2003).
[13] Parsafard N., Peyrovi M.H., Rashidzadeh M., N-Heptane Isomerization on a New Kind of Micro/Mesoporous Catalyst: Pt Supported on HZSM-5/HMS, Microporous Mesoporous Mater., 200: 190-198 (2014).
[14] Parsafard N., Peyrovi M.H., Jarayedi M., Catalytic Study and Kinetic Modeling of the n-Heptane Isomerization over Pt/Al-HMS/HZSM-5 Hybrid Catalysts, Energy Fuels., 31(6): 6389-6396 (2017).
[15] Parsafard N., Peyrovi M.H., Valipour Shokoohi M., Catalytic Performance and Kinetic Study
in the Total Oxidation of VOC over Micro/Meso Porous Catalysts, Iran. J. Chem. Chem. Eng. (IJCCE), 37(5): 19-29 (2018).
[16] Parsafard N., Peyrovi M.H., Rashidzadeh M., Experimental and Kinetic Study of n-Heptane Isomerization on Nanoporous Pt-(Re, Sn)/HZSM5-HMS Catalysts, Chin. J. Catal., 37(9): 1477-1486 (2016).
[17] Parsafard N., Peyrovi M.H., Jarayedi M., Catalytic Study and Kinetic Modeling of the n-Heptane Isomerization over Pt/Al-HMS/HZSM-5 Hybrid Catalysts, Energy Fuels, 31(6): 6389-6396 (2017).
[18] Peyrovi M.H., Parsafard N., Anajafi H.R., Catalytic Performance of Micro-Mesoporous Materials as the Supports for Pt Catalysts in n-Heptane Isomerization, Chem. Phys. Let., 713: 32-38 (2018).
[19] Parsafard N., Peyrovi M.H., Abdali Hajiabadi M., Nickel Hydrogenation Composite Catalysts Modified by Zirconium in Competitive Benzene Hydrogenation: Effect of Modifiers, Phys. Chem. Res., 8: 203-213 (2020).
[20] de Mello M. I., Sobrinho E. V., da Silva V. L., Pergher S. B., V or Mn Zeolite Catalysts for the Oxidative Desulfurization of Diesel Fractions using Dibenzothiophene as a Probe Molecule: Preliminary Study, Mol. Catal., 482: (2018).
[21] Esmaeili N., Kazemian H., Bastani D., Controlled Crystallization of LTA Zeolitic Nanoparticles from A Clear Solution Using Organic Template, Iran. J. Chem. Chem. Eng. (IJCCE), 30(2): 9-14 (2011).
[22] Zhou D., Tang B., Lu X.H., Wei X.L., Li K., Xia Q.H., Co2+-Exchanged MOR and 5A Zeolites as Efficient Solid Catalysts for the Epoxidation of Styrene with Air, Catal. Commun., 45: 124-128 (2014).
[23] Ma X.T., Lu X.H., Wei C.C., Zhao Z.S., Zhan H.J., Zhou D., Xia Q.H., Catalytic Epoxidation of Cyclic Alkenes with Air over CoOx/Zeolite Heterogeneous Catalysts, Catal. Commun, 67: 98-102 (2015).
[24] Adesina A.A., Trimm D.L., Cant N.W., Kinetic Study of Iso-Octane Steam Reforming over a Nickel-Based Catalyst, Chem. Eng. J., 99(2): 131-136 (2004).
[25] Aslam R., Usman M.R., Irfan M.F., A Comparative Study of LHHW and ER Kinetic Models for no Oxidation over Co3O4 Catalyst, J. Env. Chem. Eng., 4(3): 2871-2877 (2016).