The CUTEC concept to produce BtL-fuels for advanced powertrains

Transcription

1 International Freiberg Conference on IGCC & XtL Technologies June 16-18, 2005 The CUTEC concept to produce BtL-fuels for advanced powertrains Univ.-Prof. Dr.-Ing. Michael Claußen Dr.-Ing. Stefan Vodegel Clausthaler Umwelttechnik Institut GmbH Leibnizstr Clausthal-Zellerfeld

2 agenda motivation R & D pilot plant CUTEC experimental results conclusion 2

3 Motivation XtL-fuels CtL Coal to Liquid independence from common oil exploitation countries GtL Gas to Liquid stranded gas -fields flared gas BtL Biomass to Liquid closed loop CO2-cycle income for agriculture 3

4 Biomass to Liquid BtL Process gas conditioning Fischer Tropsch Synthesis upgrading gasoline kerosene Biomass gasification diesel wax DESIGNER-Fuel 4

5 Gasification CUTEC reactor scale bed material CFBR Circulating Fluidized Bed Reactor pilot plant 400 kw, height 8 m, diameter 0,3 m sand (heat carrier) feed wood, straw,... gasification-agent heat transfer pressure steam/oxygen or air partial oxidation (autothermic) atmospheric temperature max. 950 C gas application Fischer-Tropsch-Synthesis 5

6 gasification CUTEC CFBR Circulating Fluidized Bed Reactor 6

7 gasification CUTEC CFBR Circulating Fluidized Bed Reactor 7

8 Gasification CUTEC advantages reliable technology, less moving parts safeness, availability and stability wide range of particle sizes usuable low tar concentration in product gas constant syngas composition because of homogenous fludized bed 8

9 gas CUTEC 9

10 CUTEC component [ Vol.% ] CO CO CH H H 2 O 1-3 N 2 < 0,3 10

11 FTS-reactor R&D CUTEC reactor scale catalyst iron, cobalt... tricle-fixed-bed reactor TFBR 2,5 m length, 3 different diameter (30, 40, 70 mm) feed heat transfer pressure synthetic and/or biogene syngas 4 cooling zones max. 50 bar temperature max. 350 C application low temperature FTS 11

12 syngas Fischer-Tropsch CUTEC 4 cooling zones catalysts fixed bed reactor low pressure separator high pressure separator recycle gas low pressure separator heavy fraction light fraction aqueous fraction 12

13 FTS-reactor R&D CUTEC advantages variability of FTS-reactor system in length and diameter (3 reactors available, one installed) option to install existing FTS-reactors in series or parallel optimised cooling strategy through multiple cooling zones nearly isothermic operation possible installed product separators allows simplified FTS-product up-grading combination with hydrocracking pilot plant up scale and multi scale possible 13

14 CUTEC FTS-reactor unit & Hydrocracking pilot plant 14

15 temperature profile in CUTEC FTS-reactor Temperatur [ C] conventional FTS-reactor 4 cooling CUTEC ,2 0,4 0,6 0,8 1 Reaktorlänge [ ] 15

16 CUTEC light or heavy fraction BtL DESIGNER FUEL 2-step (Vacuum)- Rectification waxes to HC-unit 16

17 boiling curve Diesel/BtL 10 4 Diesel BTL Diesel 10 3 Signal [pa] t [min] 17

18 fuel specification conv. Diesel / BtL-fuel Diesel BtL density [kg/m³] heat value [MJ/kg] 42,5 44 aromate [%] 18 0 carbon [Gew.-%] sulfur [ppm] < 10 0 IPB [ C] FBP [ C] cetane no

19 BtL-Fuel no aromatic compounds less soot- and NOx-emissions sulfur free exhaust gas aftertreatment high cetane number (ignition behaviour) > 70 (conventionell Diesel 50) completely mixable with conv. diesel colourless & odourless, less toxic for current & future powertrain concepts 19

20 projects CUTEC Biofuels - Syngas to Liquid (Lower Saxony) FAL Braunschweig; FH Coburg ARTFUEL (Lower Saxony) artifical fuels from biomass RENEW (EU-Commission) Renewable Fuels for Advanced Powertrains VW coordinator SP 2: Process optimisation of BtL production VW, FZK, CERTH, BKG, TUV, EDF, ITN, INiG, REPOTEC, CUTEC 20

21 International Freiberg Conference on IGCC & XtL Technologies June 16-18, 2005 The CUTEC concept to produce BtL-fuels for advanced powertrains Univ.-Prof. Dr.-Ing. Michael Claußen Dr.-Ing. Stefan Vodegel Clausthaler Umwelttechnik Institut GmbH Leibnizstr Clausthal-Zellerfeld