Pedersen, Thomas Helmer

Rosendahl, Lasse

Sanchez, Eliana Maria Lozano

English

    Aalborg UniversitetModelling of the integration of HTL with CCS for the production of drop-in biofuelsSanchez, Eliana Maria Lozano; Pedersen, Thomas Helmer; Rosendahl, LassePublication date:2019Document VersionPublisher's PDF, also known as Version of recordLink to publication from Aalborg UniversityCitation for published version (APA):Sanchez, E. M. L., Pedersen, T. H., & Rosendahl, L. (2019). Modelling of the integration of HTL with CCS for theproduction of drop-in biofuels. Poster presented at 27th European Biomass Conference and Exhibition (EUBCE2019), Lisbon, Portugal.General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright ownersand it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.            ? Users may download and print one copy of any publication from the public portal for the purpose of private study or research.            ? You may not further distribute the material or use it for any profit-making activity or commercial gain            ? You may freely distribute the URL identifying the publication in the public portal ?Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access tothe work immediately and investigate your claim.Downloaded from vbn.aau.dk on: November 24, 2020Modelling of the integration of HTL with CCS for the production of drop-in biofuelsE l i a n a  L o z a n o * ,  T h o m a s  H .  P e d e r s e n ,  L a s s e  R o s e n d a h lD e p a r t m e n t  o f  E n e r g y  Te c h n o l o g y,  A a l b o r g  U n i v e r s i t y  * e l s @ e t . a a u . d kPURPOSE AND MOTIVATION:• Modeling of combined production of drop-in biofuels through hydrothermalliquefaction (HTL) of forestry residues with carbon capture and permanentunderground storage (CCS) to provide net removal of CO2 from theatmosphere.• Assessment of the energy requirements and excess heat production for districtheating application.• Base study for further analysis on biofuel production via HTL as sink ofrenewable electricity fluctuations.METHODS AND ASSUMPTIONS:Assumptions:• Steady state operation: Recirculation of aqueous phase in HTL avoids use offresh water.• Hydrogen produced in stoichiometric quantity for hydrotreating step.• Solids/coke production is not considered.The process was modeled in the software Aspen Plus ®.RESULTS:CONCLUSIONS:• More reliable estimation of the heat requirement in the HTL reactor allows abetter assessment of the heat integration in the process.• From the total carbon fed to the process, approximately 54% ends in thedrop-in biofuels while 32% is captured for permanent underground storage.The recovery of the remaining carbon in aqueous phase/solid residue will befurther analyzed together with water recovery and reuse.• A reduction of 83% and 90% in hot utility and cold utility respectively wereobtained through heat integration.• The use of flue gas in the process allows to cover the hot utility demand withexcess heat production for possible district heating use.ACKNOWLEDGMENTS:This project has received funding from the European Union’s Horizon 2020 researchand innovation program under grant no. 727531 (4refinery) and grant no. 765515(Marie Skłodowska-Curie ITN, ENSYSTRA).4,76 4,950,45 0,530,410,410,305,640,401,45HOT UTILITY COLD UTILITY HOT UTILITY COLD UTILITY ELECTRICITYQ [MJ/KG WOOD]INITIALUTILITIESHeat exchangers HTL reactor HydrotreaterElectrolyzer CO2 compressor Pumps5,240,86 0,535,17AFTER HEATINTEGRATION7,49Approach Description ReferencesHTL reactor RyieldThermodynamic approach basedon improved biomass and biocrudemodels from experimental data[1*]HydrotreaterUser modelThermodynamic approach basedon experimental carbon yields.HBO modeled with petro-characterization tools in AspenPlus®[2]ElectrolyzerUser modelAvailable model in literature [3]Adsorption unitUser modelAvailable model in literature [4]Oxufyel RstoicMass and energy balance basedon stoichiometry of combustionreactions--02004006008001000120014000 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1Temperature [C]Q [MJ/kg]FLUE GAS AS HOT UTILITYGCC Flue gasPinch 0,860,53[1] Lozano, E, Pedersen, T.H, Rosendahl. (2019). Generic approach for the modeling of liquefiedthermochemical products and biomass heat of formation. Case study: HTL biocrude, Pyrolysis oiland assessment of energy requirements. Applied Energy. (In review process)[2] Jensen, C. (2018). PIUS - Hydrofaction(TM) Platform with Integrated Upgrading Step. AalborgUniversitetsforlag.[3] Shen, et al. (2011). A concise model for evaluating water electrolysis. International Journal ofhydrogen energy, 36, 14335- 4341.[4] Ferreira, et al. (2011) Effective adsorption equilibrium isotherms and breakthroughs of waterand CO2 on different adsorbents. Ind. Eng. Chem. Res, 50, 10201–10210.Q=0Q=2.48 MJ/hHeat to processQ=0.86 MJ/h(1360ºC-390ºC)Excess heatQ=1.62 MJ/h(2539ºC-1360ºC)(390ºC-69.2ºC)CCSO2 from electrolyzerGas phasefrom processT=100ºC Flue gasTad=2539ºCFlue gasTcond=69.2ºCMASS BALANCEEUBCE 201927th EUROPEAN BIOMASSCONFERENCE & EXHIBITIONCO2HTLElectrolysisCCSDrop-in biofuelsHeat integrationExcess heatOxyfuel combustionWater treatmentHydrotreatingBiocrudeAqueous phaseH2H2OGas phaseH2OGasO2O2Flue gasAqueous phase

Modelling of the integration of HTL with CCS for the production of drop-in biofuels

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Modelling of the integration of HTL with CCS for the production of drop-in biofuels

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