生物质在流化床中的热解和气化研究

u28%4阳UE4 Al D Ns NS2000JOURNAL OF FUEL CHEMISTRY AND TECHNOLOGYEU ITOEQUA÷20AEEa°|0》NB%EONS0%￡J0cIc￡ CEEIIEAAxI0°2AT￡ Cas ONSEEAU1n3p￡世土100084200990E600°0A÷1--16b1TA02nEu0E0- aTODDaEEEwap- EuNeEND%iFolazu2AEeE·0E·0}AEμA±a-1aAEE00,632N1AYA÷”-2EμN白“ETaE自0E0-ATEa,-×oy31 HAFEo ia202AE°=E0Vo DDAE2ar"iETAODOOHa-010AEO-Al SD20"Eucalyptus Globulus 4aAOEOe SD202"Pinus Radiata aACEOUE00oEOvoHEoA-2n-AEl0TAμAE2a0-100E1010AEA00A÷》-1e0Eb1TAE0EEA0-EN6a1A20E0E910EE4A÷-29Ea￡00B40Aa°A￡mQ351.2TATx±eEAe9ATA0A±a9A253-240”20004-0298-08EulToEEEha iFEo>"ECV 0VD1i-HAEUIToEAUOA EEhaEom"EuNeuAo-AlEEuACHA lnOH-010 10aE0-01oEENS·-“Ey4aB从1-Aoa009 laEyAlHA00如0土1A0240±121E0TEAN-A÷》-2100a|4￡eEoU3-·ci0 UEUAUO"l》·±μAEe0引UukE±i1EoNE·uA1aopu0T90aE0.0TEEUμ2.BEμA0E601e00,÷00自们0EE04ETable 1 Proximate and ultimate analyses of biomass sanj6-2/0,-j÷》-2。EPoplar Bagasse Cotton SD201 SD202E0A÷-2EEao。0BEa啊 AIOHAOAHa2 Y2Eu ITOE0Ue0A÷”-2 AUEEhaen00E06A÷”-2 AUEETaA7.9412.384.94FCl%o"EAU2uEUODEEOHEyFE0 ND4iEu lTOEOUA--"2AUHAEE3.3912.4316.5211.7613.4480.1584.4077.0074.9681.22n%4.190.944.570.9DSCaauAEulToEAUA0OAV4AEo2%30D000HA0, / EWa/%2.272.551.9112.384.94C/%63010EuT0Eμ lAEEWaEo0N0eaEμNe° AIAUND6.55833°aUA÷-20DμAEEa0。印μNeND02hT40.9142.3041.0237.0140.26F40土OE啊eB0000DAA÷”2E们0EEaNalgo0.180.221.090.53%0.050.160.050E00000uA÷,-2Eu们0EE0ANBQ/Ng-115.533162451515614.82117.33EUE±1Aμ AAUEYECA0p%-A121￡EEC￡ EOUHA0i 2 EulToENuE-HAAE%T-02)461kE°T×÷们ANB%a10μA0,2-06÷01eEUA200Table 2 Size distribution of biomass sampleuE-A-0±U06060A÷”9pE0A÷AA÷”2 Size range Poplar Bagasse Cotton SD201sD202ODEEhaEo> HAEo iazu lr 2uAE j Eo laxe-0-0AEipiIDEEsawdust/%o stem/% /OHEae IASEμA±a0B071 eEUAE| aooeu ideo-AEE2.00.051.07.10.2130.1213.727.433.30.6540.227a》AAUA°OEA元×号》 DSAEOe IA EHA1pE0.71~0.638.11.94.49.07713.9461EμNe15.62.34.624.23626.9521.1 FE0-0-AT91'2AT OEt AEEyO01uAUHAEUITOE0.442-00.80.94.88.1506.215NufE--NTA%-4aA@"Poplar sawdust@@" bagasse0.280~0.10514.72.314.621.19510.232A“0A' Cotton st￡AA00ENE52.73.5431.000SD208000A%A围SD202“000EAaA00.0-0.012.00.00.94.8201.1670.00.63.8160.758oEAVAuAND4ipu11 Van Swinden Laboratorium Nederlands中国煤化工0.430.2490417Meetinstituut b.V.laej￡EE6la00 Eu ITOENU·OAxYHCNMHGE0,aE0U￡q99-12A-OP34-14A121-718EECEelx+ITAiiEITAi9Af9TS3-CT92-0093101ax÷￥1cAA1a12aiE…61在革择12EnN10A1e4 UE0N0雕E:u0E00A÷-“20AEEa9I陌NAμAN-”-0x÷A÷”2Ea-·0EA2ATA“了NE山 acaai1pATA601a.BAEE- claRAEμNeC￡A啊4034-yE￥2乙Af￡2ATμAE%A￡-e0EμATA￡1a 332 mI￡0}E÷ TA E HA v4E Ea u Ey %4Y2ET0EB,612印μNex°0A印μNex°OAE00·cEu÷g0ATx° MODULE- TK EEUCAY4-A/±aiAe°I0ePC0Ae÷》-2·0÷pE00A÷10AN1216CD21,16 THAA/D X号°axe8EEa[y死÷aAyT|3 aAi lEy%Y2E14- HIsHExe3Eftcl41E9EA0a21=3y3%gE0aE90±0APoAEEE·0E÷±aAU%4l0migB1360mA2A土9x甲x0AAAA0yA+A。EE士 A=AiiEEuNeBa.010 fxI BEe1ax÷A1273K0船2 4-ca lyal0DE士0A?EN02E[N280mm00mim911oomA.BE.0±。2x°EA1.3EμNe“ENe0A2ATAE自A,￥A-600mA0.6- Ao lenox°EEc1·0E:a2al×OBc0EE900℃0AEE2h0ay00u210=·0}EEe0如b°c.2.C±1A2A4OED.01ETdA2.0≠ATAE12oAT2f- euRAL-E±1o·0}rEex01AE.06104kW8WE2÷00,6 DRz Diucxe Eed0B0uA÷A16)A0Ee0u÷AIA爬E:00Ela:00i￡EUACHAA÷Ai￡y·0E0Bμ AIAEIE町“0896￡56AT20A°euco9 I AY Dy、0AT>2、0ATE土a0n°a0Do12min0U,oAT|Ua°1eAT0060E土 gauze=uAE±= ENuCZ20 DDAo laE fex6T6 feRNet°AEAT20HAEulIOEAL 9IEμ NeaTo96A20AUE0aAuA20u￡EcEμNeI0°Aμ AEuTTOEA￡E10AH%20 GC-9A Eo laE FExOCAe TB-0l0FoNuxe0￡0ASTA‰0N￡±20四k2 NuAiHA0。0Eu￥OxHAEEuv4 412aFEE" TCDEQUE10A113a0u1l 0%20NuE22°6A·Eu0A10×10-6pAxe0E10AGDX1041 5A-0x0E E Ex Ouf2E2a3o o NuODHA H2icOic141 EnEx° OAlul3I4CO2iC2ik2icH4jC2H4iC2HμE3E·0i￡00e·0lNFig. 1 Schematic layout of the test facility1-NuA2U×÷101A-060N0×e·09-AA土exo￡N1. reactor￡n2. heating elements￡吗3. plenum boxIng4. residue d iauAuANu00aAy0自土exk0Aya土1+“E死charge pi5. steam generatorE6, nitrogen bottles. biomass eaNu[oB,÷x白0μAay0AEEw feederfn9, motor 10. gear casef>ll. motor0D1OμAEμNe|64b40±i3iE12. gear caseE 13. nitrogen flow meterE14. biomass drop tube15. stearSfCheaterf-16. cyclone 17. tar cracker±f3印№16如18. main gas cooler 19. condensed water/tar collector220. filTable 3 Experimental conditionsterE>21. glass condensing coilL 22. gas flow counter E 23. gas flow Fluidizing Medium rate Dense bed Dilute phase Biomass feedmeterEn24. sampling lineE 25. torchE> 26. power and control medium /kg- temperature/K temperature/K rate/kg 4h2.6~3.0923~1073923~10731.6l~2.35OEOUEuITOE AAEA D021f AAEORVaEYOx1120MUCAE5000iE 0AlVEAui oxiEla12a4o'ElEia23E0A 2 EWNev2a'u0e lOAUaEU011900130 ITAlO DDvA°eEAY2.1E8060A÷216 )IAEU TOEμAEaD-00E0Dy. AIhuA, AlEUAE0E÷EU÷00E1ENey3109￡-060中国煤化工主a°压-A,61yiE0A20m2E+30A201AH.B0.0A2uCNMH可?sE￡60EATaN1AiE-AO1FE0m"EOAUHAEo la. "UEB1 A%4-1y Ee'2AUtaN, EUEy TA o 2uEUEE- O%azEuaEEo la2uITEcAaAl1UA-Da1voEeA= -"2iE1a-A01AaAl1UAUHATASE1y COj cO, iCH iEaEuul lvACas-o1I1E010o1a2uB￡63u们00-ATy0c· CEuEEWhazQUAaAl1Ula2a° ITie3ela0e104Ta1E0,To9Ta21K0AaE×敏帮,e0Ex÷Aa“AEA÷-ax1a00.B们Aa·cE们ANa6Ela=rey9300Ns NS28%00E210|2E8060 EEV2aFEoFoia2ulTicila2uIaA÷02-￡CEUEClAA-Eoj0-1-0￡°0.0ATE∪%a,q" IAEA÷oaxe0 Halay-0AEHO+CO÷CO2+H￡1E0 ladlE iH29Co"000%70~75%￡6H4?CO26H,O+CH4SCO+3H2"22000420~25%62H400%3~5%8E0 UEulTOE0-A02H20+CH4eCO2 +4H“39μAN。A. EEo iau IioD Co uA amy0AE‘0￡64C+ H2Oeco+H24EC 30%00EliCH2 WAlay-OAEEae lA EHAEy, BYo0ovA0EBaECC+CO2÷>2C0e"5Eo OEQUEe IA EHAEy, BE10f1E9c22p9329C42pc62E03EC+scHA2"620 H2 HAG- EEMAOGCHAOu"; En0 SD2012700 CE+ H HAlanyOUECEuTTOEEEV2aFo s- HAx01va1uECEU3EEo ia2ulOAE土E60°E±0A÷OuA000EU700℃C~800℃·q￡0÷09-0BH2 i COco2 i CHic2H4xe-0Ep109I1iEAUEH2Aay0AE00￡S202E60650℃2uuA2u足。3E.0023y0eEu0E0-AT±%f01800C-ISAUEH2 HAlaxy-OAEOO-uFEl2iCCO HAlaDy-OIa￡n106·0;AvEj60/Eu0E0EA± trATi AAe"6AEEae IAEuAEy B04iEa0÷ 0 ECOEOU·0霁“19DμE0oE010±4A0DuA0 AOA=EU000·0°auAa10 A8"afei iv4 8bEODHA750℃Eμ NeHa'IEIE6EuDeoauAAieeo'EO0T'HAEuITOEO-AT26E/afEo"Eo c-EEODEu2,-OCtaDAECEuNe 1o2TEuOAiECO2 HAlay- 0la2urpA2uAE|3E·0024 i Eo laTERμ0xSAE0A庄 A IEHA Ey BA00610E<2A0￡oCH4OaEi- OH TASE E TAAexA00oO SD201 i sD202 a CH, WAlamy-OAETVAEe TAyEuAEy mooDEupuiiEAyEHA:0acoμi￡1￡A0902÷oaxe·Oμ Alamy-OAEl8,0AIFU2.1.1 Fo laxe-OHAlamy-OAE I742 0A16 ECIa·cE0°U±aj2H21cO2≠A°A4“0EyBE00A÷11TA2D201sD02EA120CO0cH1C2HA00-0如10印A:AT90-650℃;…700℃∴;-650℃;-700℃;75r(;:-80℃-750℃;x-800°12H2lay·0AE-AcE1TEFig 2 Volume fraction of H, vs, time at different temperatures H, Ofc(a)S2HCnG煤化工AHFig 3 Volume fraction of CO vs. time at different temperature H,04 UE0N0雕E:u0E00A÷-“20AEEa9I陌N301(b) SD2023-●-650^C650C:m-70n℃C-750℃ˇ-800°i44CO2la。y·0AE-A1TμH2OEFig 4 Volume fraction of CO2 vs. time at different temperature H2Of@(a) SDn(b)SD20)2750℃;;·80750℃∴Time/miniv5 CH iany-OAE-TANE10THig"H,Of0Fig 5 Volume fraction of CH4 vS. time at different temperaturefH2Ofc(a)SD201)sD202-650%;-70-750°12i6C2H4ay·0AE-AE1Iμ"H2OE⊙Fig 6 Volume fraction of C2 H4 vS. time at different temperature"H,OfC0 DIEU3E CO9H2是i0C09E060·cE±a:ia0200,0AT压UaE0la2 aee ia"EyB00 rEusE CO29H2i0aD·00E00TA"μA060A0E0uEA°￡A"0,BE50Aa2AE0hBiEW214oCi EEuOO lA-E0%, BEH. i Co, uAlay-OAE012oif 00lIAEO%, B,6u I TOEHAEE/a IFEo EUAEO%of6ulT2.1.2A01a2足E°EE060A÷”-10如 TAE- OEAlHA09A08aEE7o℃E址la2uAEASD201 i SD202 OUEuNe1yaioDuAEo ia 2uAE j-c 0i3fp中国煤化工 A> OD/2Ee0pEEEA·0±EU147°l48Iw7±iA￡6Eu0EEe800HCNMHGC, OAIAEWA2a10210}E÷3mim90形iauA20AENc=001iATE0A96￡501auA2AE90diu10aEpA÷0E0 UEU TOEμA018 10Ex20U, oATEUVaze T"TA EIAED ia2ulc·09A.BE0A0UEN0A框·啊SAU60EA×0Aay·0 DELa 0IE T90A详￥1ayoa9EGia2d择×0%6·0uA×÷0A160A×÷0Aru山:cE21a0°a4 Al OFE0 la2uIIHA302Ns NS28%有-750℃C;00℃121 47 o la2uAE-IAE10lulE H,OfCFig 7 v:O-750℃;x-800iv8 FEola-CEEAi-lAnE10uiE"H,0ECFig. 8 Gas low heat value vs. time at different temperatures H,Ofxe-000HiCO210÷E60cH1iC2H4A。AAE4E00A1-1 EulToEHAEEhaEr0。xBS足EEo laEEOuO2Eao8uui i Fo iaEEOux !uAC- EEECEe IA E Table 4 Conversion efficiencies of biomass examples with steamuAEy.80TAu0a0-5AECc0E我xATAμAEy,BEas fluidized mediaFo la2ulTOd Chi, H HEEEOu, BHAFEo lao-Ai14OEUEAItomass Temperature Temperature Efficiency Efficienc0AaEc0H2A=A060960202A00D06050phase exchange exchange0以40A- CEEAiHAv2uulif%2.1.3 AUAi IOEAixa bSAE OaEuiToEEE)aEo Poplar sawdust 59056l86.25HAAUAi×8> DSAE n。EA× SAE n19Poplar sawdust 61974.0989A°EoμAuiT·cE0E0-ATpAμ》cEA×100%E7E0A° OHAOEA00%￡^8￡Cotton stenE]"12Ac220DHAoiAoFo i fco, OEFo iau liHA+E-oH,icOi,, H xe3EuA,EA%FoiE Cotton stem 74970.7583OEFo ia2uliHAE2E* iAU y2uAE j 2u iN1AHic74,0083,87AOA67e·0pA|aoy0 BEigE4xe·0μ AEEOHE6YOx Ea36中国煤化工7582.46ouAu2cEE:°A° Eo HAoEAi ifE600A÷》-10如CNMHGIA2 EU ITOEEE5a。 HAAUAix母 DSAE x母SD202655DSAE心0±i4￡i410Ex9 SAE ne I n0eEu0E62.07uA00AaB1￡啊两00 EulToEzEaexAAUTa291x000aSD202ATA哐ia教揚sAGE02aoa.800oia24 UE0N0雕E:u0E00A÷-“20AEEa9I陌N303]iOD CO, HA aoUE0EAi xa DSAExU, BOUAUAixa, DS19 0A%4 13 EC SD201 EE)aFo ia2uIrOD2,I-xeAEf0μAa。y-0AE0EμNeAd9TA"EμAuE41414422p0A-101AE0EAEa0A单死0x÷A+150士EC[1a2AEjp们》·cEA0eE小NeA9A" oE%4-AuHA1y3i0 0aECEEhajEEaE> EE%a HA10lHj EOU OAlx HAO T"TA E IAEho ia2ulixe-Oa02a-cE·00Eo.0÷ AUFEo i CI leENa HAlaDy-0 ae j eo laua2 uAE j EEOuf'4a啊0TE「￡AT92两A9山6a·0As10:E0096A0￡啊00±c0A0道AE0aEμA0 Ueune IA哐SASD2019sD202x÷AEEA÷》 IAHAEE/a EuNefvc0E00A÷》- AUHAEE/ Uii i laxe0lay102, 1-EulTOEHAEEVa ioD0022, I-i2la 2UE i EauftA AEHA OD OA TEC COiL, icHi co, i C HEAaOD CoAae0xv2eEU SD201μ AEEh2a loDO i￡O-750°8000-750℃;x-800ik9H2la。y·0AE-TAE1p"sD201￡N2E0i 10 Co lany-OAE-IAE10THigsD201EN2Fig9 Volume fraction of H, ys. time at differentFig 10 Volume fraction of co vs, time at differenttemperatures" SD201EN2ECtemperatures SD2012N22C700℃0-750℃C;x-800℃0-750℃C;x-800℃Time/miniw 11 co, ian- oAE-IAE10TuiEsD201EN,20i412CH41axy-0AE-TA10uE”SD20EN2回ig. 11 Volume fraction of CO, ys. time at differentFig 12 Volume fraction of Ch vs. time at differenttemperatures SD201EN,ECture￡"SD2O1￡N,E⊙uAay0AE、345~61%i￡H2Aay·0AEEa们AEE8066CHAa。y·0AE021A“业700℃O-750℃C800700℃00ElE±0A÷0|A￡ 0o=0U B| AlAON IEEaeuaEA60×0ca。-°rD0·cEb“们EaE3EE·0×OμAca-Tr0H2Ea020 yOHO laHAEEOHEr图TAEy、 BloODEulAvauj fCo2pAay·0 beer 9o EGe IA爬中国煤化Ey.B啊00DEauμ￡ COich HAian0AE0百TAEA10CNMH0Ap0x÷A÷》-%eOE土币E806 OACNUAU土AyTA14 13 CH ia. OAE-TASE10THig"SD201EN,ECA E013EFig 13 Volume fraction of C H4 vs. time at different数掂304Ns NS28%114 ola2uAE-IA爬0Iμ¨SD21￡N2E1v4 15 Ao la-CEEAi-IATE10IuIS" SD201EN,2CFig. 14 Variation of gas yield vs. time at differentFig 15 Gas low heat value vs. time at differenttmperature"SD201￡N,turE"SD201EN-E01aA÷A^oA"a|olo2nj￡OB5D1 A VadxIDife2AE7496%Ex0·c·0μA6±15、036μ但0A÷》-104 pIA SD201 EEhauAAl0Ax369lapA3E06DoμAx÷0A1ESAE0EA×》9SAE1E土50 Ey 4YHAC÷E0土f4A0A÷-1041 IAFEo DY2uITHAx6co±000u2uAc=E00AAx号DSA土E0A÷”-16AA31y700cE0ax白μAa?y0AE.02ODTa土HADSAEμli0μA20ij￡0SD201|aAyu650℃1udoA￡A00e土150A÷--10 pIAEuITOEμAEEAE0EA÷- IAHAFo la2u ITOD H2 DiCOiCH4°fcO2lay0Table 5 Conversion efficiencies of biomasf" SD201fCwith nitrogerAEuA2±02A020700~800℃ IASE-ISAU6as fluidized media死0A÷>第Aoa2u0H2Aay0AE土AABiomass Temperature Temperature Eficiency EfficienoA÷》E±xT6B36170%￡6O2B3680%￡和CO9Iof Dilute of energy of massCHA HAiaxy-OAE000a-0+oxllaui 51% 1 47 %Ep ECphase exchange exchange0a002±0 Ea IAEμAEy.o0DiE土f61asD2010E00O0°lpoA÷xE土ola3E·0uA± E2l FoUlA×cOaASD201ECEOUl-IA( A- Etho la2uITODHA C2H49ISD20173868.5274.01SD201733C2H正E6.×0压01aA土E[oA÷E士0°a,B6SD20180520%0A50%EE03AAA÷”-2E门EEaAE±9DxaE06/ouAa0026 AUEEH±060ola2.3 E80oEo Fo A- -io 4p TAEu ITOEEEhaFo Dd AEs-A+aEo laxe-0-02A fOCOAUUE1EEa2uI%1oi]1μA±ET± RIEU ITOE0UeD[a0A÷-"20 DHAEEY2a00ouoEU3E-0x0Ai2IDiHAEo iau lTE0a0002uFola100186190A00BeEuACHAAlu。lco±j￡0uA105TA020E1EA05A96920100800011AlaE:0uAtEuA2AE4土c1E土[EaE141460,0Ax￡"T=1023~1073K￡们I[la2 uAE VAEae, B o000￡0c0oa2 iAEA6Table 6 Comparison of gas fractions with steam and nitrogenD020 UTai-HAEaE2EljE[40BE6aE土A2AE土EEafluid medium"SD201ET=1023-1073KECFluid medium H,/%o CO/% CO/% CH4/% CaHe/% Ceh6+ CmH,%oA2AE1A0.8600AE土x×0 A=Aiv4FE AEy2Wamm35-3131-315-1710-1234-403-06x0yuA土EI±149±50DA00 Ey4Y20U-0TA们E8EEa6x09y= IHAAUAiIOEAi是SAE3JYH化xa0±EEay3,B11%E0aD@6EAEA÷fy±4Aμ AEuNeND%9·0T6￡aE00uA3600TA00DEU0EAE5ax÷0A0UE060A÷” HAEulTOEEET2aAEo DCaa0￡x09Ty=10D[00:×÷0A20-0EcA±082Y士E自官E10U6000490A--104 I AzExAIAEHAEy0E0-A1阿0-0.06Ne0AAla00EN0E..6E202000Eu甲4 UE0N0雕E:u0E00A÷-“20AEEa9I陌N￡“200死ATA框U650℃-800℃们1540E2AE12060EAxS4Em4Ee·0:A框AEy.BEaAEμ AEy BcH2°CO2 OUEo ia2uIT0EμAlay·0AE060￡EAx母DAE“0A0Ax母》 DSAEffoCOE06[006050C09Ikca,TwA。A000 Eu lAvi EEu A÷E土A×》BAEA000u0A÷》E址Ax号DAEE0 EHAEEV2aFEo "lATE“60700℃cE2ola2订1xe·0E“429÷-“2AE060A‘0UA0U1E0EEa自uAay0AEa-26￡3EHA1101%00)AN%acBUE CHiC H HEEoia2ulii2￡¨3￡UEEa0-0Bu0E- AIHAAUAix母BSPI iv4 IA IxEUIEY Fabry RE-Goudeau J C. Thermal conversion of biomass and waste by combustion and pyrolysis/gasification -CEC Directorate-Generalfor energy demonstration programnfUCEY Inf Biomass for Energy and Industryf-Ed. by Grassi G et al. f-19875-274-282￡UYE0N0%.A÷1--16 bIAEuITOEEEhako> ly3 HaeuNeOeA￡DIND4gUnY±9a,a6NEEA01a3p1998EU3EY Donald S SE -an Piskorzf-Maurice A B et al. The role of temperature in the fast pyrolysis of cellulose and wooQUJfY Ind Eng Chem Res f-1988￡2215E8EU4CY Theodore R NE -Jack B HE John P L et al. Product compositions and kinetics in the rapid pyrolysis of sweet gum hardwooaUJEY Ind EngChem Process Dev2-19852-24322836EUSEY krister SE -Emilia Bf-Rolando Z et al. The pyrolysis step in combustion of biomass and coa SUCEY EC Research ProjectE APAS-Con-tract COAL -CT92-00022U6EY Mao Jian- -Li Ding-kaif-Cheng Chang-min et al. Thermochemical Upgrading of Biomasses to Gaseous and Liquid Fuels andFeedstockSUClY EEC Biomass Research Project No. TS3'-CT92-0093f-Department of Thermal Engineeringe-iTsinghua UniversitBeijing100084￡hinaEU7EY Corella JE-Hlerguido JE-Gonzalez-saiz J. Steam gasification of biomass in fluidized bede effect of the type of feedstocfUCEY In2pyrolysis Gasification -Ed. By Ferrero G L et al. 1989f-618-623EU8EY Ozturk Zf Merklin J F. Rapid pyrolysis of cellulose with reactive hydrogen gas in a single- pulse shock tulfUJEY Fuelf 1995E1411261658-1663STUDY ON BIOMASS PYROLYSIS AND GASIFICATION N A FLUIDIZED BEDSU Xue- yongf-WANG Zhi-weif Cheng Cong-mingE -Tang Song -taof-LU Zi-anE-LI Ding-kaiE Thermal Engineering Department f-Tsinghua University 2-Beijing 1000842-ChinaECABSTRACTE Experimental investigations of biomass pyrolysis and gasification were performed in a fluidized bed reactor with steam and nitrogen as fluid medium respectively. The size of the stainless steel reactor is 150mm ID and 1360mm height. Five biomass samples -including poplar sawdust bagasse cottonstemf eucalyptus globulus and pinus ratiataf have been tested on the facility at the temperatures rangingfrom 923K to 1073K. During each test rune biomass feedstock was fed into the reactor continuouslytwelve minutes and without residue discharge meanwhile seven gas samples were taken -five in feedingprocess and two after stop of feeding. The transient and accumulated gas yielwere measured wltameter and a gas meter. The temperatures of the fluid bed and freeboard were acquired by a system ofhe \as he experimental resultsf-the variations of gas yieldf-wa alyzed on a gas chromagograph.Onomnnsitionf energy conversion effciency and mass conversion efficiency with temperature are中国煤化-nass feedstock in theboth cases of steam and nitrogen fluidization. It has been reCNMHGhus my cougauun that the presence ofsteam in the fluidized bed reactor stimulates tar cracking to form the gas species of C2H4 and C2H6fetcKEY WORDSE biomassf-fluidized bedE pyrolysis gasification00级09E6kAa底E￡a3E￡EA01a3x0ui￡