Carbon Nanomaterials in Hydrogenation Catalysis 1 0 0 P F 8- 5 5 7 1 0 8 8 7 1 8 7 9 9/ 3 0 1 0. 1 oi: d g | or c. s s.r b u p s:// p htt n o 9 1 0 2 h c ar M 2 2 n o d e h s bli u P View Online Catalysis Series Editor-in-chief: Justin S. J. Hargreaves, University of Glasgow, UK 1 0 P0 Series editors: F 8- Bert Klein Gebbink, Utrecht University, The Netherlands 5 5 7 Jose Rodriguez, Brookhaven National Laboratory, USA 1 0 8 8 7 1 Titles in the series: 8 7 9 1: Carbons and Carbon Supported Catalysts in Hydroprocessing 9/ 03 2: Chiral Sulfur Ligands: Asymmetric Catalysis 1 0. 3: Recent Developments in Asymmetric Organocatalysis 1 oi: 4: Catalysis in the Refining of Fischer–Tropsch Syncrude d g | 5: Organocatalytic Enantioselective Conjugate Addition Reactions: or c. A Powerful Tool for the Stereocontrolled Synthesis of Complex s s.r Molecules b pu 6: N-Heterocyclic Carbenes: From Laboratory Curiosities to Efficient ps:// Synthetic Tools htt 7: P-Stereogenic Ligands in Enantioselective Catalysis n 9 o 8: Chemistry of the Morita–Baylis–Hillman Reaction 1 0 9: Proton-Coupled Electron Transfer: A Carrefour of Chemical Reactivity 2 ch Traditions ar M 10: Asymmetric Domino Reactions 2 2 11: C–H and C–X Bond Functionalization: Transition Metal Mediation n d o 12: Metal Organic Frameworks as Heterogeneous Catalysts e h 13: Environmental Catalysis Over Gold-Based Materials s bli 14: Computational Catalysis u P 15: Catalysis in Ionic Liquids: From Catalyst Synthesis to Application 16: Economic Synthesis of Heterocycles: Zinc, Iron, Copper, Cobalt, Manganese and Nickel Catalysts 17: Metal Nanoparticles for Catalysis: Advances and Applications 18: Heterogeneous Gold Catalysts and Catalysis 19: Conjugated Linoleic Acids and Conjugated Vegetable Oils 20: Enantioselective Multicatalysed Tandem Reactions 21: New Trends in Cross-Coupling: Theory and Applications 22: Atomically-Precise Methods for Synthesis of Solid Catalysts 23: Nanostructured Carbon Materials for Catalysis 24: Heterocycles from Double-Functionalized Arenes: Transition Metal Catalyzed Coupling Reactions 25: Asymmetric Functionalization of C–H Bonds 26: Enantioselective Nickel-catalysed Transformations 27: N-Heterocyclic Carbenes: From Laboratory Curiosities to Efficient Synthetic Tools, 2nd edition 28: Zeolites in Catalysis: Properties and Applications View Online 29: Biocatalysis: An Industrial Perspective 30: Dienamine Catalysis for Organic Synthesis 31: Metal-free Functionalized Carbons in Catalysis: Synthesis, Characterization and Applications 32: Modern Biocatalysis: Advances Towards Synthetic Biological Systems 1 0 0 33: NO Trap Catalysts and Technologies: Fundamentals and Industrial P x F 8- Applications 5 75 34: Alternative Catalytic Materials: Carbides, Nitrides, Phosphides and 1 80 Amorphous Boron Alloys 8 7 35: Enantioselective Cobalt-catalysed Transformations 1 8 7 36: Noncovalent Interactions in Catalysis 9 39/ 37: Carbon Nanomaterials in Hydrogenation Catalysis 0 1 0. 1 oi: d g | or c. s s.r b u p s:// p htt n o 9 1 0 2 h c ar M 2 2 n o d e h s bli u P How to obtain future titles on publication: Astandingorderplanisavailableforthisseries.Astandingorderwillbring delivery of each new volume immediately on publication. 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Whilstthismaterialhasbeenproducedwithallduecare,TheRoyalSocietyofChemistry cannotbeheldresponsibleorliableforitsaccuracyandcompleteness,norforany consequencesarisingfromanyerrorsortheuseoftheinformationcontainedinthis publication.Thepublicationofadvertisementsdoesnotconstituteanyendorsementby TheRoyalSocietyofChemistryorAuthorsofanyproductsadvertised.Theviewsand opinionsadvancedbycontributorsdonotnecessarilyreflectthoseofTheRoyalSocietyof Chemistrywhichshallnotbeliableforanyresultinglossordamagearisingasaresultof relianceuponthismaterial. TheRoyalSocietyofChemistryisacharity,registeredinEnglandandWales, Number207890,andacompanyincorporatedinEnglandbyRoyalCharter (RegisteredNo.RC000524),registeredoffice:BurlingtonHouse,Piccadilly, LondonW1J0BA,UK,Telephone:þ44(0)2074378656. Forfurtherinformationseeourwebsiteatwww.rsc.org PrintedintheUnitedKingdombyCPIGroup(UK)Ltd,Croydon,CR04YY,UK 7 0 0 P F 8- Preface 5 5 7 1 0 8 8 7 1 8 7 9 9/ 3 0 1 10. Carbons have been attracting increasing attention as supports in various doi: catalytic applications. It began with the traditional amorphous carbon g | materialssuchasactivated carbons(ACs)andcarbon blacks (CBs). Because or c. of their neutral nature, carbon supports may be suitable for the production s s.r of fuels and lubricants via hydroprocessing (HPR). Thus, in the case of b u p carbon-supported HPR catalysts, the adverse effects of nitrogen bases ps:// present in difficult feeds could be significantly diminished. Consequently, n htt the catalyst life can be extended. Carbon supports maintain stability in the o 9 presenceofwaterthatiseitherproducedduringhydrodeoxygenation(HDO) 1 20 orispresentinreactionstreams,asisusuallythecasewithbiomass-derived h c feeds. This was one of the major conclusions of the review on Carbons and ar M Carbon Supported Catalysts in Hydroprocessing by the present author, 2 n 2 published as part of the Catalysis Series a decade ago. o d Gradually,novelcarbonmaterialshavebeendiscoveredandhaveentered e sh the world of catalysis science. Among them, the properties of carbon ubli nanotubes (CNTs), carbon nanofibers (CNFs), carbon nanohorns (CNHs), P graphene, graphene oxide (GO), reduced graphene oxide (rGO) and fuller- eneshavebeendescribedindetail.Theproductionmethodshaveadvanced to the stage that today, carbon nanomaterials are manufactured com- mercially. Numerous practical applications of these materials have been noted in the scientific literature, particularly those in various fields of catalysis. As an important field of heterogeneous catalysis, hydrogenation (HYD) has been playing a key role during the conversion of various feeds to fine chemicals required for the production of pharmaceuticals, perfumery products, food additives, etc. Apparently, the severity, in terms of tempera- ture and H pressure employed during these applications, is much lower 2 than that encountered in HPR for the production of fuels and lubricants. CatalysisSeriesNo.37 CarbonNanomaterialsinHydrogenationCatalysis ByEdwardFurimsky rEdwardFurimsky2019 PublishedbytheRoyalSocietyofChemistry,www.rsc.org vii View Online viii Preface Because of the severity difference, in this review the former process will be distinguished from HYD. The database available in the scientific literature indicates remarkable activity and selectivity of some catalysts supported on CNT, CNF, CNH, GO andrGOsupports,comparedwiththosesupportedonACsandCBsandalso 7 0 0 on traditional oxidic supports such as Al O , SiO , TiO , SiO –Al O and P 2 3 2 2 2 2 3 F 8- zeolites. Amongactivemetals, noble metals suchasPt,Pd,Ru andRhhave 5 5 beenusedmostextensively.Toalesserextent,transitionmetalssuchasNi, 7 1 0 Co, Fe, Cu, Mo and W have also been attracting attention. In an effort to 8 8 7 improve catalyst performance, bimetallic catalysts consisting either of two 1 8 7 noble metals or of one noble metal combined with a transition metal have 9 39/ been developed. 0 0.1 The advances in preparation methodology with the aim of obtaining 1 oi: tailor-made catalysts have been noted. Of particular significance are the d g | methods formodification ofthe surface structure of carbon nanomaterials. or First,thelowreactivityandhydrophobicityofpristinecarbonnanomaterials c. s.rs canbechangedbydoping,whichinvolvesthereplacementofcarbonatoms b u in a hexagonal aromatic ring with heteroatoms such as nitrogen, sulfur, p s:// phosphorus and boron. This results in the modification of the electronic p htt properties of the surface. In addition, functionalization can change the on acidity and basicity of neutral pristine solids. For example, ranges of acidic 9 1 and basic strength can be attained by introducing hydroxyl, carboxyl and 0 2 h sulfonic groups and amino groups, respectively. With such supports avail- c ar able, bifunctional catalysts based on functionalized carbon nanomaterials M 2 can be prepared. Otherwise, such catalysts could be prepared using acidic 2 on supports (e.g. silica–alumina, zeolites). d e Thebiofeedsderivedfromdifferenttypesofbiomasshaveemergedasan h s bli important source of various value-added products. In this regard, catalysts u P supportedoncarbonnanomaterialsseemtooutperformthosesupportedon traditional supports. This was evident in the depolymerization of the com- ponents of lignocellulosic biomass such as cellulose, hemicellulose and lignin. Thus, under mild conditions, the yields of monomeric products ob- tained over catalysts supported on carbon nanosupports exceeded those obtainedoverothercatalysts.Similarly,fortheformercatalysts,highactivity and selectivity for the products of interest were also obtained during the conversion of vegetable oils and algae biomass components. Under more severe conditions, such as those encountered in HPR, the biomass-derived feeds are converted to hydrocarbons for transportation fuels. It should be noted that in all of these applications, the presence of water did not affect the performance of catalysts supported on carbon nanosupports. Reactants containing a,b-conjugated CQC and CQO double bonds, such as cinnamaldehyde and citral, have been extensively investigated for the production of fine chemicals. In these applications, the high selectivity re- quirementforhydrogenationoftheCQObondwhileleavingtheCQCbond intact could be achieved over noble metal catalysts supported on carbon nanosupports. View Online Preface ix Hydrocarbons have been studied over catalysts supported on carbon nanomaterials either as individual reactants or as part of the feeds derived from conventional petroleum and also from nonconventional sources. The streams of alkenes (e.g. ethylene and styrene) from pyrolysis require a final polishtoremove alkynes (e.g.acetyleneandphenylacetylene) before further 7 0 0 utilization. To ensure stability, the final traces of alkenes must be removed P F 8- from gasoline and diesel fractions. Regulatory limits on the aromatics 5 5 content of fuels can also be met by final polishing. In these applications, 7 1 0 catalysts consisting of noble metals supported on CNTs and/or CNFs 8 8 7 exhibited good performance at ambient temperature and with near atmos- 1 8 7 pheric pressure H . 9 2 39/ Resultsontheconversionofrealfeedsderivedfrompetroleumandthose 0 0.1 obtained from nonconventional sources confirmed that with respect to 1 oi: activity and selectivity, catalysts supported on carbon nanomaterials d g | exhibited better performance than those supported on conventional oxidic or supports. Also, the performance of the former catalysts was better than c. s.rs that of the corresponding catalysts supported on amorphous carbons such b u as ACs and CBs. Therefore, great potential of carbon nanomaterials as p s:// supports for HYD and HPR catalysts is anticipated. p htt on Edward Furimsky 9 1 0 2 h c ar M 2 2 n o d e h s bli u P 0 1 0 P F 8- List of Acronyms 5 5 7 1 0 8 8 7 1 8 7 9 9/ 3 0 1 10. AC Activated carbon oi: AGO Atmospheric gas oil d g | AR Atmospheric residue or c. ASA Amorphous silica–alumina s s.r CALC Cinnamyl alcohol b u p CALD Cinnamaldehyde ps:// CB Carbon black n htt CNF Carbon nanofiber o 9 CNH Carbon nanohorn 1 20 CNT Carbon nanotube h c CSTR Continuous stirred tank reactor ar M CVD Chemical vapor deposition 2 2 DBT Dibenzothiophene n d o DMF Dimethylfuran e h EOR End of run s ubli FB Fullerene black P FCC Fluid catalytic cracking FF Furfural FFA Furfuryl alcohol FLG Few-layers graphene FT Fischer–Tropsch GNP Graphene nanoplatelet GNR Graphene nanoribbon GO Graphene oxide GVL g-Valerolactone HCALC Hydrocinnamyl alcohol HCALD Hydrocinnamaldehyde HCR Hydrocracking CatalysisSeriesNo.37 CarbonNanomaterialsinHydrogenationCatalysis ByEdwardFurimsky rEdwardFurimsky2019 PublishedbytheRoyalSocietyofChemistry,www.rsc.org x