Dehydrocyclization of n-octane over boron- and barium-doped V-Mg-O catalysts: influence of n-octane/oxygen ratios
Tóm tắt
Boron- and barium-doped vanadium–magnesium oxide catalysts (BVMgO and BaVMgO) were synthesized by the wet impregnation method and were used for the oxidative dehydrogenation of n-octane at different n-octane/O2 molar ratios. The catalysts were characterized by ICP-OES, in situ XRD, 51V MAS NMR, SEM, EDX and TGA-DSC. The catalytic tests were carried out in a continuous flow fixed bed reactor. The incorporation of boron and barium as dopants into the VMgO system resulted in catalysts with some differences in properties, such as the details of phase transformations, porosity and degree of hydration. The catalytic performance was affected by the strength of the oxidative environment. Moreover, incorporation of barium enhanced the catalytic performance of VMgO, while the addition of boron adversely affected the performance of VMgO over all n-octane/O2 molar ratios with regard to both activity and oxidative dehydrogenation selectivity.
Tài liệu tham khảo
Hornaday GF, Ferrell FM, Mills GA (1961) Manufacture of mono- and diolefins from paraffins by catalytic dehydrogenation. In: McKetta JJ Jr (ed) Advances in petroleum chemistry and refining, vol 4. Interscience, Pans
Bhasin MM, McCain JH, Vora BV, Imai T, Pujado PR (2001) Dehydrogenation and oxydehydrogenation of paraffins to olefins. Appl Catal A Gen 221:397–419
Hodnett BK (2000) Heterogeneous catalysis oxidation: fundamental and technological aspects of the selective and total oxidation of organic compounds. Wiley, New York, pp 66–101
Denayer JF, Baron GV, Vanbutsele G, Jacobs PA, Martens JA (2000) Evidence for alkylcarbenium ion reaction intermediates from intrinsic reaction kinetics of C6–C9 n-alkane hydroisomerization and hydrocracking on Pt/H-Y and Pt/USY zeolites. J Catal 190:469–473
Akhmedov VM, Al-Khowaiter SH, Al-Refai JK (2003) Hydroconversion of C5–C8 alkanes over Zr-containing supported catalysts prepared by metal vapour method. Appl Catal A Gen 252:353–361
Jongpatiwut S, Sackamduang P, Rirksomboon T, Osuwan S, Resasco DE (2003) n-Octane aromatization on a Pt/KL catalyst prepared by vapour-phase impregnation. J Catal 218:1–11
Kuznetsov PN (2003) Study of n-octane hydrocracking and hydroisomerization over Pt/HY zeolites using the reactors of different configurations. J Catal 218:12–23
Grau JM, Yori JC, Vera CR, Lovey FC, Condo AM, Parera JM (2004) Crystal phase dependent metal-supported interactions in Pt/SO42–ZrO2 catalysts for hydroconversion of n-alkanes. Appl Catal A Gen 265:141–152
de Lucas A, Valverde JL, Sanchez P, Dorado F, Ramos MJ (2005) Hydroisomerization of n-octane over platinum catalysts with or without binder. Appl Catal A Gen 282:15–24
de Lucas A, Ramos MJ, Dorado F, Sanchez P, Valverde JL (2005) Influence of the Si/Al ratio in the hydroisomerization of n-octane over platinum and palladium beta zeolite-based catalysts with or without binder. Appl Catal A Gen 289:205–213
de Lucas A, Sanchez P, Dorado F, Ramos MJ, Valverde JL (2005) Effect of the metal loading in the hydroisomerization of n-octane over beta agglomerated zeolite based catalysts. Appl Catal A Gen 294:215–225
Altwasser S, Welker C, Traa Y, Weitkamp J (2005) Catalytic cracking of n-octane on small-pore zeolites. Microporous Mesoporous Mater 83:345–356
Szechenyi A, Solymosi F (2006) n-Octane aromatization on Mo2C-containing catalysts. Appl Catal A Gen 306:149–158
Yanhui W, Diyong W (2001) The experimental research for production of hydrogen from n-octane through partially oxidizing and steam reforming method. Int J Hydrogen Energy 26:795–800
Zhang J, Wang Y, Ma R, Wu D (2003) Characterization of alumina-supported Ni and Ni–Pd catalysts for partial oxidation and steam reforming of hydrocarbons. Appl Catal A Gen 243:251–259
Subramanian R, Panuccio GJ, Krummenacher JJ, Lee IC, Schmidt LD (2004) Catalytic partial oxidation of higher hydrocarbons: reactivities and selectivities of mixtures. Chem Eng Sci 59:5501–5507
Qi A, Wang S, Fu G, Wu D (2005) Autothermal reforming of n-octane on Ru-based catalysts. Appl Catal A Gen 293:71–82
Williams KA, Schmidt LD (2006) Catalytic autoignition of higher alkane partial oxidation on Rh-coated foams. Appl Catal A Gen 299:30–45
Panuccio GJ, Schmidt LD (2006) Increasing olefins by H2 and CH4 addition to the catalytic partial oxidation of n-octane. Appl Catal A Gen 313:63–73
Panuccio GJ, Schmidt LD (2007) Species and temperature profiles in a differential sphere bed reactor for the catalytic partial oxidation of n-octane. Appl Catal A Gen 332:171–182
Mamedov EA, Cortes Corberan V (1995) Oxidative dehydrogenation of lower alkanes on vanadium oxide-based catalysts. The present state of the art and outlooks. Appl Catal A Gen 127:1–40
Burch R, Swarnakar R (1991) Oxidative dehydrogenation of ethane on vanadium–molybdenum oxide and vanadium-niobium-molybdenum oxide catalysts. Appl Catal 70:129–148
Andersen PJ, Kung HH (1993) The effect of oxygen binding energy on the selective oxidation of butane over V/γ-Al2O3. Stud Surf Sci Catal 75:205–217
Kung HH, Michalakos PM (1993) Catalytic selective oxidation, ACS symposium series. Hattingh L, Washington DC, pp 389–408
Chaar MA, Patel D, Kung MC, Kung HH (1987) Selective oxidative dehydrogenation of butane over V-Mg-O catalysts. J Catal 105:483–498
Chaar M, Patel D, Kung HH (1988) Selective oxidative dehydrogenation of propane over V-Mg-O catalysts. J Catal 109:463–467
Blasco T, Lopez Nieto JM, Dejoz A, Vazquez MI (1995) Influence of the acid-base character of supported vanadium catalysts on their catalytic properties for the oxidative dehydrogenation of n-butane. J Catal 157:271–282
Kung HH, Kung MC (1997) Oxidative dehydrogenation of alkanes over vanadium–magnesium-oxides. Appl Catal A Gen 157:105–116
Blasco T, Lopez Nieto JM (1997) Oxidative dehydrogenation of short chain alkanes on supported vanadium oxide catalysts. Appl Catal A Gen 157:117–142
Dejoz A, Lopez Nieto JM, Marquez F, Vazquez MI (1999) The role of molybdenum in Mo-doped V–Mg-O catalysts during the oxidative dehydrogenation of n-butane. Appl Catal A Gen 180:83–94
Elkhalifa EA, Friedrich HB (2010) Oxidative dehydrogenation of n-octane using vanadium–magnesium oxide catalysts with different vanadium loadings. Appl Catal A Gen 373:122–131
Elkhalifa EA, Friedrich HB (2011) On the effect of hydrocarbon/oxygen ratios during the dehydrogenation of n-octane over a VMgO catalyst. Catal Lett 141:554–564
Elkhalifa EA, Friedrich HB (2014) Oxidative dehydrogenation and aromatization of n-octane over VMgO catalysts obtained by using different MgO precursors and different precursor treatments. J Mol Catal A: Chem 392:22–30
Thomas JM, Thomas WJ (1997) Principles and practice of heterogeneous catalysis. VCH, Weinheim
Bowker M (1998) The basis and applications of heterogeneous catalysis. Oxford University Press, Oxford, UK
Patel D, Andersen PJ, Kung HH (1990) Oxidative dehydrogenation of butane over orthovanadates. J Catal 125:132–142
Valenzuela RX, Mamedov EA, Cortes Corberan V (1995) Effect of different additives on the performance of V-Mg-O catalysts in the oxidative dehydrogenation of propane. React Kinet Catal Lett 55:213–220
Stern DL, Michaels JN, DeCaul L, Grasselli RK (1997) Oxydehydrogenation of n-butane over promoted Mg-V-oxide based catalysts. Appl Catal A Gen 153:21–30
Sugiyama S, Hashimoto T, Morishita Y, Shigemoto N, Hayashi H (2004) Effects of calcium cations incorporated into magnesium vanadates on the redox behaviours and the catalytic activities for the oxidative dehydrogenation of propane. Appl Catal A Gen 270:253–260
Sugiyama S, Hashimoto T, Tanabe Y, Shigemoto N, Hayashi H (2005) Effects of the enhancement of the abstraction of lattice oxygen from magnesium vanadates incorporated with copper(II) cations on the oxidative dehydrogenation of propane. J Mol Catal A: Chem 227:255–261
Klisinska A, Loridant S, Grzybowska B, Stoch J, Gressel I (2006) Effect of additives on properties of V2O5/SiO2 and V2O5/MgO catalysts II. Structure and physicochemical properties of the catalysts and their correlations with oxidative dehydrogenation of propane and ethane. Appl Catal A Gen 309:17–27
Jin M, Lu P, Yu GX, Cheng ZM, Chen LF, Wang JA (2013) Effect of additives doping on catalytic properties of Mg3(VO4)2 catalysts in oxidative dehydrogenation of cyclohexane. Catal Today 212:142–148
Elkhalifa EA, Friedrich HB (2015) Effects of boron and barium dopants on VMgO catalysts employed in the oxidative dehydrogenation of n-octane. Kinet Catal 56:212–221
Elkhalifa EA, Friedrich HB (2014) Magnesium oxide as a catalyst for the dehydrogenation of n-octane. Arab J Chem. doi:10.1016/j.arabjc.2014.10.002
Dasireddy VDBC, Singh S, Friedrich HB (2013) Activation of n-octane using vanadium oxide supported on alkaline earth hydroxyapatites. Appl Catal A Gen 456:105–117
Corma A, Lopez Nieto JM, Paredes N (1993) Preparation of V-Mg-O catalysts: nature of active species precursors. Appl Catal A Gen 104:161–174
Corma A, Lopez Nieto JM, Paredes N (1993) Influence of the preparation methods of V-Mg-O catalysts on their catalytic properties for the oxidative dehydrogenation of propane. J Catal 144:425–438
Burch R, Crabb EM (1993) Homogeneous and heterogeneous contributions to the oxidative dehydrogenation of propane on oxide catalysts. Appl Catal A Gen 100:111–130
Oganowski W, Hanuza J, Kepinski L, Mista W, Maczka M, Wyrostek A, Bukowski Z (1998) New intermediate phases in formation at V–Mg–O catalyst. J Mol Catal A: Chem 136:91–104
Hayakawa S, Yoko T, Sakka S (1993) 51V NMR studies of crystalline divalent metal vanadates and divanadates. Bull Chem Soc Jpn 66:3393–3400
Blasco T, Lopez Nieto JM (1996) Nuclear magnetic resonance studies on supported vanadium oxide catalysts. Colloids Surf A Physicochem Eng Asp 115:187–193
Holgado MJ, San Roman S, Malet P, Rives V (2005) Effect of the preparation method on the physicochemical properties of mixed magnesium–vanadium oxides. Mat Chem Physic 89:49–55
Michalakos PM, Kung MC, Jahan I, Kung HH (1993) Selectivity patterns in alkane oxidation over Mg3(VO4)2–MgO, Mg2V2O7, and (VO)2P2O7. J Catal 140:226–242