Direct injection of superheated steam for continuous hydrolysis reaction

Handle URI:
http://hdl.handle.net/10754/562294
Title:
Direct injection of superheated steam for continuous hydrolysis reaction
Authors:
Wang, Weicheng; Turner, Timothy L.; Roberts, William L. ( 0000-0003-1999-2831 ) ; Stikeleather, Larry F.
Abstract:
The primary intent for previous continuous hydrolysis studies was to minimize the reaction temperature and reaction time. In this work, hydrolysis is the first step of a proprietary chemical process to convert lipids to sustainable, drop-in replacements for petroleum based fuels. To improve the economics of the process, attention is now focused on optimizing the energy efficiency of the process, maximizing the reaction rate, and improving the recovery of the glycerol by-product. A laboratory-scale reactor system has been designed and built with this goal in mind.Sweet water (water with glycerol from the hydrolysis reaction) is routed to a distillation column and heated above the boiling point of water at the reaction pressure. The steam pressure allows the steam to return to the reactor without pumping. Direct injection of steam into the hydrolysis reactor is shown to provide favorable equilibrium conditions resulting in a high quality of FFA product and rapid reaction rate, even without preheating the inlet water and oil and with lower reactor temperatures and lower fresh water demand. The high enthalpy of the steam provides energy for the hydrolysis reaction. Steam injection offers enhanced conditions for continuous hydrolysis of triglycerides to high-purity streams of FFA and glycerol. © 2012 Elsevier B.V.
KAUST Department:
Clean Combustion Research Center; Mechanical Engineering Program; Physical Sciences and Engineering (PSE) Division
Publisher:
Elsevier BV
Journal:
Chemical Engineering and Processing: Process Intensification
Issue Date:
Sep-2012
DOI:
10.1016/j.cep.2012.04.003
Type:
Article
ISSN:
02552701
Sponsors:
This material is based upon work supported by the National Science Foundation EFRI program under Grant EFRI-093772.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Weichengen
dc.contributor.authorTurner, Timothy L.en
dc.contributor.authorRoberts, William L.en
dc.contributor.authorStikeleather, Larry F.en
dc.date.accessioned2015-08-03T09:59:42Zen
dc.date.available2015-08-03T09:59:42Zen
dc.date.issued2012-09en
dc.identifier.issn02552701en
dc.identifier.doi10.1016/j.cep.2012.04.003en
dc.identifier.urihttp://hdl.handle.net/10754/562294en
dc.description.abstractThe primary intent for previous continuous hydrolysis studies was to minimize the reaction temperature and reaction time. In this work, hydrolysis is the first step of a proprietary chemical process to convert lipids to sustainable, drop-in replacements for petroleum based fuels. To improve the economics of the process, attention is now focused on optimizing the energy efficiency of the process, maximizing the reaction rate, and improving the recovery of the glycerol by-product. A laboratory-scale reactor system has been designed and built with this goal in mind.Sweet water (water with glycerol from the hydrolysis reaction) is routed to a distillation column and heated above the boiling point of water at the reaction pressure. The steam pressure allows the steam to return to the reactor without pumping. Direct injection of steam into the hydrolysis reactor is shown to provide favorable equilibrium conditions resulting in a high quality of FFA product and rapid reaction rate, even without preheating the inlet water and oil and with lower reactor temperatures and lower fresh water demand. The high enthalpy of the steam provides energy for the hydrolysis reaction. Steam injection offers enhanced conditions for continuous hydrolysis of triglycerides to high-purity streams of FFA and glycerol. © 2012 Elsevier B.V.en
dc.description.sponsorshipThis material is based upon work supported by the National Science Foundation EFRI program under Grant EFRI-093772.en
dc.publisherElsevier BVen
dc.subjectBiofuel productionen
dc.subjectContinuous hydrolysisen
dc.subjectFFAen
dc.subjectGlycerolen
dc.subjectSuperheated steamen
dc.subjectSweet wateren
dc.titleDirect injection of superheated steam for continuous hydrolysis reactionen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalChemical Engineering and Processing: Process Intensificationen
dc.contributor.institutionDepartment of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, United Statesen
dc.contributor.institutionPermafuels Inc., Chapel Hill, NC, United Statesen
dc.contributor.institutionDepartment of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC, United Statesen
kaust.authorRoberts, William L.en
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