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Chaudhary PK, Arundhathi R, Kasture MW, Samanta C, Vankayala R, Thota C. Temperature-dependent synthesis of dimethyl ether (DME) from methanol over beta zeolite: a novel approach to a sustainable fuel. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230524. [PMID: 37621656 PMCID: PMC10445025 DOI: 10.1098/rsos.230524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 07/11/2023] [Indexed: 08/26/2023]
Abstract
Crystalline beta zeolite molecular sieve with SiO2/Al2O3 molar ratio of 28.5 was synthesized by the hydrothermal crystallization method and examined for methanol dehydration reaction. The micro-mesoporous beta zeolite was active between 280 and 450°C. Dimethyl ether (DME) was observed as the predominant product at all reaction temperatures, with a maximum selectivity of 47.9% at 300°C and a methanol turnover frequency (TOFMeOH) of 741.9 h-1. At increased reaction temperatures, beta zeolite showed enhanced strong acid site fraction, promoting higher hydrocarbon formation following the olefin-based cycle. It was revealed that the crystallinity, porosity and acidity of beta zeolite change in the reaction environment. Amorphous carbon deposition occurred on beta zeolite, which involved a loss in crystallinity to some extent. The temperature increase showed a pore-broadening phenomenon at elevated temperature regions. Regeneration cycle testing demonstrated beta zeolite activity maintained stable throughout a 280 h time-on-stream period.
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Arundhathi R, Reddy PL, Samanta C, Newalkar BL. Chromium-free Cu@Mg/γ-Al 2O 3 - an active catalyst for selective hydrogenation of furfural to furfuryl alcohol. RSC Adv 2020; 10:41120-41126. [PMID: 35519200 PMCID: PMC9057799 DOI: 10.1039/d0ra08754h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 11/02/2020] [Indexed: 11/25/2022] Open
Abstract
Development of a chromium (Cr)-free hydrogenation catalyst is very important to replace the existing hazardous Cr based catalyst used in the furfural hydrogenation to furfuryl alcohol. Herein, we report synthesis of well-dispersed copper nanoparticles supported on hydrothermally stable magnesium doped alumina (Cu@Mg/γ-Al2O3) for selective hydrogenation of furfural to furfuryl alcohol. The prepared catalyst was characterized by X-ray Photoelectron Spectroscopy (XPS), Auger Electron Spectroscopy (AES), Powder X-ray Diffraction (PXRD), Surface Area Analysis (SAA), High Resolution-Transmission Electron Microscopy (HR-TEM), Temperature Programmed Reduction/Desorption (TPR/TPD) and Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) to understand textural properties of the catalyst. The prepared catalyst was found to be highly active and selective with 99% conversion of furfural and 94% selectivity for furfuryl alcohol under solvent free conditions at 443.15 K and 2 MPa of hydrogen pressure. It was also observed that the Cu@Mg/γ-Al2O3 catalyst is reusable (up to six runs) while maintaining its high activity and selectivity (≥94%) in the hydrogenation of furfural to furfuryl alcohol. A catalyst for selective hydrogenation of furfural to furfural alcohol in a solvent free environment.![]()
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Reddy PL, Arundhathi R, Tripathi M, Chauhan P, Yan N, Rawat DS. Solvent-Free Oxidative Synthesis of 2-Substituted Benzimidazoles by Immobilized Cobalt Oxide Nanoparticles on Alumina/Silica Support. ChemistrySelect 2017. [DOI: 10.1002/slct.201700251] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Reddy PL, Tripathi M, Arundhathi R, Rawat DS. Chemoselective Hydrazine-mediated Transfer Hydrogenation of Nitroarenes by Co3O4Nanoparticles Immobilized on an Al/Si-mixed Oxide Support. Chem Asian J 2017; 12:785-791. [DOI: 10.1002/asia.201700025] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Indexed: 12/23/2022]
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Reddy PL, Arundhathi R, Tripathi M, Rawat DS. CuI nanoparticles mediated expeditious synthesis of 2-substituted benzimidazoles using molecular oxygen as the oxidant. RSC Adv 2016. [DOI: 10.1039/c6ra11678g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
2-Substituted benzimidazoles from o-diaminobenzenes and aldehydes using CuI nanoparticles as a heterogeneous nano-catalyst and O2 as an oxidant were synthesised in excellent yields.
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Reddy PL, Arundhathi R, Rawat DS. Cu(0)@Al2O3/SiO2 NPs: an efficient reusable catalyst for the cross coupling reactions of aryl chlorides with amines and anilines. RSC Adv 2015. [DOI: 10.1039/c5ra19337k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The C–N cross coupling reaction of aryl chlorides with various alkyl/aryl amines catalyzed by copper nanoparticles impregnated on alumina/silica support (Cu(0)@Al2O3/SiO2) was investigated and the catalyst showed excellent reactivity and efficacy.
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Damodara D, Arundhathi R, Likhar PR. Copper Nanoparticles from Copper Aluminum Hydrotalcite: An Efficient Catalyst for Acceptor- and Oxidant-Free Dehydrogenation of Amines and Alcohols. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300453] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Damodara D, Arundhathi R, Ramesh Babu TV, Legan MK, Kumpaty HJ, Likhar PR. Polymethylhydrosiloxane derived palladium nanoparticles for chemo- and regioselective hydrogenation of aliphatic and aromatic nitro compounds in water. RSC Adv 2014. [DOI: 10.1039/c4ra01333f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Chemo- and regioselective hydrogenation of a wide range of nitro compounds has been achieved with polysiloxane-stabilised ''Pd'' nanoparticles and PMHS in water.
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Arundhathi R, Mizugaki T, Mitsudome T, Jitsukawa K, Kaneda K. Highly selective hydrogenolysis of glycerol to 1,3-propanediol over a boehmite-supported platinum/tungsten catalyst. CHEMSUSCHEM 2013; 6:1345-1347. [PMID: 23794444 DOI: 10.1002/cssc.201300196] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 05/01/2013] [Indexed: 06/02/2023]
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Mizugaki T, Arundhathi R, Mitsudome T, Jitsukawa K, Kaneda K. Selective Hydrogenolysis of Glycerol to 1,2-Propanediol Using Heterogeneous Copper Nanoparticle Catalyst Derived from Cu–Al Hydrotalcite. CHEM LETT 2013. [DOI: 10.1246/cl.130198] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Arundhathi R, Damodara D, Mohan KV, Kantam ML, Likhar PR. Monodispersed and Stable Nano Copper(0) from Copper- Aluminium Hydrotalcite: Importance in CC Couplings of Deactivated Aryl Chlorides. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201201007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Damodara D, Arundhathi R, Likhar PR. High surface and magnetically recoverable mPANI/pFe3O4nanocomposites for C–S bond formation in water. Catal Sci Technol 2013. [DOI: 10.1039/c2cy20624b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mizugaki T, Yamakawa T, Arundhathi R, Mitsudome T, Jitsukawa K, Kaneda K. Selective Hydrogenolysis of Glycerol to 1,3-Propanediol Catalyzed by Pt Nanoparticles–AlOx/WO3. CHEM LETT 2012. [DOI: 10.1246/cl.2012.1720] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Sai Prathima P, Srinivas K, Balaswamy K, Arundhathi R, Narsimha Reddy G, Sridhar B, Mohan Rao M, Likhar PR. Biscinchona alkaloid catalysed Henry reaction of isatins: Enantioselective synthesis of 3-hydroxy-3-(nitromethyl)indolin-2-ones. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.11.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Arundhathi R, Damodara D, Likhar PR, Kantam ML, Saravanan P, Magdaleno T, Kwon SH. Corrigendum: Fe3O4@mesoporouspolyaniline: A Highly Efficient and Magnetically Separable Catalyst for Cross-Coupling of Aryl Chlorides and Phenols. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Layek K, Maheswaran H, Arundhathi R, Kantam ML, Bhargava SK. Nanocrystalline Magnesium Oxide Stabilized Palladium(0): An Efficient Reusable Catalyst for Room Temperature Selective Aerobic Oxidation of Alcohols. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000591] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Arundhathi R, Kumar DC, Sreedhar B. C-N Bond Formation Catalysed by CuI Bonded to Polyaniline Nanofiber. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000149] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kantam ML, Arundhathi R, Likhar P, Damodara D. Reusable Copper-Aluminum Hydrotalcite/rac-BINOL System for Room Temperature Selective Aerobic Oxidation of Alcohols. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900405] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Likhar PR, Arundhathi R, Kantam ML, Prathima PS. Amination of Alcohols Catalyzed by Copper-Aluminium Hydrotalcite: A Green Synthesis of Amines. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900628] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Sreedhar B, Arundhathi R, Reddy PL, Kantam ML. CuI Nanoparticles for C−N and C−O Cross Coupling of Heterocyclic Amines and Phenols with Chlorobenzenes. J Org Chem 2009; 74:7951-4. [DOI: 10.1021/jo901462g] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sreedhar B, Arundhathi R, Reddy P, Reddy M, Kantam M. Cu-Al Hydrotalcite: An Efficient and Reusable Ligand-Free Catalyst for the Coupling of Aryl Chlorides with Aliphatic, Aromatic, and N(H)-Heterocyclic Amines. SYNTHESIS-STUTTGART 2009. [DOI: 10.1055/s-0029-1216890] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sreedhar B, Arundhathi R, Reddy M, Kantam M. Efficient Catalytic
Activity of Copper/Aluminum Hydrotalcite in Diaryl Ether Synthesis. SYNTHESIS-STUTTGART 2009. [DOI: 10.1055/s-0028-1083334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Sreedhar B, Arundhathi R, Reddy M, Kantam M. Efficient Catalytic Activity
of Copper/Aluminum Hydrotalcite in Diaryl Ether Synthesis. SYNTHESIS-STUTTGART 2009. [DOI: 10.1055/s-0028-1083304] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Sreedhar B, Surendra Reddy P, Amarnath Reddy M, Neelima B, Arundhathi R. AgOTf catalyzed direct amination of benzyl alcohols with sulfonamides. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.087] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Likhar PR, Arundhathi R, Kantam ML. A recyclable Cu/Al-HT catalyst for amination of aryl chlorides. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.03.136] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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