BTF系统处理硫化氢废气工程设计外文参考文献译文及原文Word文档下载推荐.doc

BTF系统处理硫化氢废气工程设计外文参考文献译文及原文Word文档下载推荐.doc

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专业：

环境工程

年级班别：

2004级

（1）班

学号：

3104008168

学生姓名：

谢辉

指导教师：

陈凡植教授

2008年6月11日

1

Biologicalsweeteningofenergygasesmimicsinbiotricklingfilters

MarcFortunya,c,JuanA.Baezaa,XavierGamisansb,CarlesCasasa,JavierLafuentea,

MarcA.Deshussesc,*,DavidGabriela,1

aDepartmentofChemicalEngineering,UniversitatAuto`nomadeBarcelona,EdificiQ,CampusdeBellaterra,08193Bellaterra,Barcelona,Spain

bDepartmentofMiningEngineeringandNaturalResources,UniversitatPolite`cnicadeCatalunya,Manresa,Spain

cDepartmentofChemicalandEnvironmentalEngineering,UniversityofCalifornia,Riverside,CA92520,UnitedStates

Received25July2007;

receivedinrevisedform27October2007;

accepted29October2007

Availableonline21December2007

Abstract

Removalofhydrogensulfidefromwasteandenergy-richgasesisrequired,notonlybecauseofenvironmentalhealthandsafetyreasons,butalsobecauseofoperationalreasonsifsuchgaseshavetobeusedforenergygeneration.Abiotricklingfilterfortheremovalofultra-highconcentrationsofH2Sfromoxygen-poorgasesisproposedandstudiedinthiswork.Twolaboratory-scalebiotricklingfilterswereusedtostudythestartupperiodandtodeterminethelong-termperformanceofthegassweeteningprocess.TheinletH2Sconcentrationrangedfrom900to12000ppmvandtwodifferentpackingmaterialswereinvestigated.TherewasnotoxicityeffectobservedevenatathehighestH2Sconcentration,andmaximumeliminationcapacitiesof280and250gH2Sm-3h-1wereobtainedatgascontacttimesof167and180s,respectively.Elementalsulfurandsulfatewerefoundtobethemostabundantend-productsofthebiologicaloxidationofsulfidewhenoperatedundermicroaerophilicconditions.Thebiotricklingfilterwasabletoquicklyrecoveritsnominalperformanceafterdifferentloadincreasesandsystemshutdownssimulatingfieldoperation.Theresultsreportedhereshowthatbiotreatmentcanbeaninterestingalternativetoconventionalgassweeteningsystemsnormallyusedforsuchapplications.

Keywords:

Hydrogensulfide;

Gassweetening;

Biotricklingfilter;

Desulfurization;

Fuelgas;

Biogas

1.Introduction

Hydrogensulfideisacommonreducedsulfurcompoundfoundinseveralindustrialwastegases.Itiseasilyrecognizablebyitsoffensiverotteneggsodor.However,odornuisanceisnotthemainissueinenergy-richgasessuchasbiogasfromanaerobicdigesterswhichmaycontainH2Sconcentrationsexceeding500ppmvandupto20000ppmv（2%v/v）（WoodcockandGottlieb,2004）.Insuchcases,H2Sremoval,oftencalledgassweetening,isnecessarytoavoidcorrosionofcombustionenginesandSOxgenerationinthefluegases.Thus,removalofH2Sfromwasteandenergy-richgasesisrequired,notonlyforenvironmentalhealthandsafetyreasonsbutalsoforoperationalreasons.

Sofar,themostcommonlyusedtreatmenttechnologyforH2Sremovalisselectiveabsorptioninaminessuchasdiglycolamine,monoethanolamine,methyldiethanolamineorothercompoundsthathaveahighaffinityforH2S（WoodcockandGottlieb,2004）.Althoughtheseprocesseshavebeenextensivelyandsuccessfullyapplied,theyhavemanydrawbackssuchashighenergyandoperatingcostsduetotheregenerationoftheabsorbentphase.Inthiscontext,biologicalprocessesforairpollutioncontrolaregainingpopularity（Deshusses,1997;

Devinnyetal.,1999;

KennesandVeiga,2001）buthavenotyetbeengenerallyappliedtotreatmentofH2Sinenergy-richgases.

BiologicalH2Sutilizationasenergysourceforlithoautotrophicorganismsisawell-knownprocessthatcanbedescribedwiththefollowingoverallreactions（Eqs.

（2）,（3））.Notethatoxidationtoelementalsulfurcanonlyhappenunderoxygenlimitedconditions,andthatexcessoxygenisrequiredfortheformationofsulfate（Kuenen,1975;

WoodcockandGottlieb,2004）.

Biofilters,bioscrubbersandbiotricklingfiltershavebeenproventobeasuitable,environmentallyfriendlyandcosteffectivealternativeforwastegastreatment,especiallyforthetreatmentoflowconcentrationsofH2S（YangandAllen,1994;

GabrielandDeshusses,2003a;

KimandDeshusses,2005）.However,therehasbeenlimitedsuccessindealingwithhighconcentrationsofH2S（>

1000ppmv）usingbiofilters,biotricklingfiltersandbioscrubbersandonlyfewindustrialprocesseshavebeenfullydevelopedforsuchapplication.Amongthem,theThiopaqprocess（Paques,TheNetherlands）,andtheBiopuricprocess（Biothane,USA）aretheonlyonesspecificallydevelopedfortheremovalofhighconcentrationsofH2Sfrombiogasorfuelgas.TheThiopaqprocessisatwo-reactorsystemconsistingofaconventionalcausticscrubberfollowedbyanexpandedbedbioreacto