Catalytic hydrotreatment of fast pyrolysis liquids from Pine wood using Ru-based catalysts supported on nitrogen-doped carbon materials - Details

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Abstract：

Catalytic　hydrotreatment　is　one　of　the　promising　routes　for　upgrading　pyrolysis　liquids　(PLs)　to　intermediates　that　can　be　co-fed　with　vacuum　gas　oil　for　FCC　refinery.　Among　all　the　factors,　catalysts　are　always　crucial　in　catalytic　hydrotreatment　of　PLs　as　hydrogenation　and　repolymerization　reactions　occur　in　parallel.　Therefore,　catalysts　with　sufficient　hydrogenation　activity　are　generally　required　to　enhance　the　hydrogenation　reaction　and　to　inhibit　the　repolymerization　reaction　of　the　thermally　liable　compounds　in　PLs.　Among　all　noble　metal　catalysts　tested,　Ru/C　catalysts　showed　a　better　performance　than　other　catalysts　in　terms　of　the　oil　yield　and　deoxygenation　level.　However,　a　clear　repolymerization　was　observed　during　catalytic　hydrotreatment　of　PLs　using　Ru/C　catalysts,　especially　during　mild　hydrotreatment,　thus　there　is　still　ample　room　for　their　activity　improvement.　Here,　a　series　of　Ru-based　catalysts　supported　on　nitrogen-doped　carbon　materials　(NC)　and　activated　carbon　(AC)　were　prepared.　The　catalytic　performance　was　evaluated　for　hydrotreatment　of　PLs　in　a　batch　autoclave　(250　°C,　8　MPa　H2,　4　h　for　mild　hydrotreatment;　340　°C,　6　MPa　H2,　4　h　for　deep　hydrotreatment).　The　Ru　catalyst　supported　on　nitrogen-doped　carbon　materials,　obtained　by　the　polyol　reduction　method　with　polyvinylpyrrolidone　(PVP)　as　the　protective　agent　(Ru/NC　(PVP)),　showed　a　better　performance　(in　terms　of　product　oil　properties)　than　the　other　catalysts　investigated　in　this　work,　due　to　a　good　distribution　of　the　ruthenium　nanoparticles.　For　mild　hydrotreatment　the　H/C　ratio,　O/C　ratio　and　MCRT　value　were　1.42,　0.37　and　9.9　wt%,　respectively.　For　deep　hydrotreatment　the　H/C　ratio,　O/C　ratio　and　MCRT　value　were　1.26,　0.16　and　4.6　wt%.　The　comparison　with　results　published　earlier　for　other　hydrotreatment　catalysts　is　satisfactory　but　also　shows　room　for　further　improvement.　GC–MS　and　1H　NMR　results　showed　that　the　contents　of　thermal　liable　components　like　aldehydes　(16.7　%),　ketones　(24.3　%)　and　sugars　(4.0　%)　in　PLs　were　quantitatively　converted　under　mild　hydrotreatment,　while　phenols　and　alkanes　significantly　increased　from　35.9　%,　0　%　to　49.1　%,　35.3　%,　respectively,　especially　for　deep　hydrotreatment　compared　with　PLs　feed.　The　catalyst　characterization　revealed　that　Ru/NC　(PVP)　with　the　most　uniform　dispersion　and　the　smallest　average　particle　size　(1.5　nm),　rendered　the　best　performance.　These　findings　indicate　that　Ru/NC　(PVP)　catalyst　is　a　promising　candidate　for　the　catalytic　hydrotreatment　of　PLs.　©　2024　Elsevier　Ltd

Keyword：

Biomass Catalytic hydrotreatment Fast pyrolysis Pyrolysis liquids Ru supported on nitrogen-doped carbon materials

Community：

[ 1 ] [Xia Y.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 2 ] [Xi N.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 3 ] [Yu X.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 4 ] [Luo M.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 5 ] [Chen S.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 6 ] [Wang Q.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 7 ] [Wang Q.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China
[ 8 ] [Lin Y.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 9 ] [Lin Y.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China
[ 10 ] [Wang R.]School of Chemistry and Chemical Engineering, Environmental Testing Center, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Jiangxi, Nanchang, 330031, China
[ 11 ] [Li H.]National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300000, China
[ 12 ] [Yue J.]Department of Chemical Engineering, Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, Groningen, 9747 AG, Netherlands
[ 13 ] [Yang C.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 14 ] [Yang C.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China
[ 15 ] [Yin W.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 16 ] [Yin W.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China
[ 17 ] [Qiu T.]Fuzhou University International Joint Laboratory of Thermochemical Conversion of Biomass, Fujian Universities Engineering Research Center of Reactive Distillation Technology, College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
[ 18 ] [Qiu T.]Qingyuan Innovation Laboratory, Fujian, Quanzhou, 362801, China

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