working group gasification & gas cleaning - tu wien · working group gasification & gas...

Institute of Chemical Engineering page 1Achema 2012

Chemical Process Engineering

Working group Gasification & Gas Cleaning

[email protected]




Content

• Working group Gasification and Gas Cleaning

• Dual fluidised bed gasification fundamentals

• Design development

• Industrial application

• Catalytic tar removal

• Contacts



The GGC team focuses on projects from the energy technology sector with a

specification on gasification technologies as well as catalytic tar removal from

producer gas originating from thermo-chemical hydrocarbon conversion

processes.

Mission: Development of fuel flexible, high efficient gasification technologies for

the production of high quality syngas.

Research topics:

• Dual fluidized bed steam gasification of biomass, coal, waste materials

• Producer gas adaptation by catalytically active bed material

• Catalytic reforming of hydrocarbons in secondary fixed bed units

• Development of a new gasification process based on the dual fluidized bed process

• Pressurized gasification




Biomass Steam Gasification

Syngas

Electricity

Fuels

Heating/ Cooling

Thermal Gasification, Biomass

combined heat and power plant

in Guessing, Austria



DFB Gasification – Principle of the process I

Steam Air

Biomass

Gasification

(~ 850 °C)

Combustion

(~ 920 °C)

Producer Gas

(CH4, CO, H2, CO2, H2O)Flue gas

Circulation

(bed material,

char coal)

Heat

Fuel to

combustion



DFB Gasification – Principle of the process I

Steam Air

Biomass

Circulation

(bed material,

char coal)

Heat

Fuel to

combustion

CaCO3

CaO

Producer gas

(H2-rich)

Flue gas

(+CO2)

Gasification

+absorption

600…700°C 850…900°C

Combustion

+desorption

Dual fluidised bed steam gasification of solid biomass coupled with CO2 capture

CaO + CO2 ↔ CaCO3



DFB Gasification – Principle of the process II

Typical producer gas composition

Component Unit Conventional process SER process*

H2 vol.-%db 36 … 42 55 … 70

CO vol.-%db 19 … 24 5 … 11

CO2 vol.-%db 20 … 25 7 … 20

CH4 vol.-%db 9 … 12 8 … 13

C2H4 vol.-%db 2.0 … 2.6 1.4 … 1.8

C2H6 vol.-%db 1.3 … 1.8 0.3 … 0.6

C3-Fract. vol.-%db 0.3 … 0.6 0.3 … 1.0

Tar g/Nm³db 4 … 8 0.3 … 0.9

Dust g/Nm³db 10 … 20 20 … 50

H2O vol.-% 30 … 45 50 … 60

Fuel wood pellets wood pellets

Bed material Olivine Calcite

* SER: Sorption enhanced reforming



Design development I

1993-1996, „FICFB* gasifier“

* Fast Internally Circulating Fluidized Bed



Design development II

1999-2003 2004-now



Investigations on a novel

fluidized bed concept

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Advanced DUAL FLUID gasifier



Details of the countercurrent gasification reactor

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Advanced DUAL FLUID gasifier



Industrial application

Güssing, Austria

in operation since 2002

8.0 MWth, 2.0 Mwel

gas engine

Oberwart, Austria

in operation since 2008

8.5 MWth, 2.8 Mwel

gas engine, organic rankie cycle (ORC)

Plants under commissioning: Villach, Austria - 15 MWth, 3.7 Mwel, gas engine

Klagenfurt, Austria - 25 MWth, 5.5 Mwel, gas engine, ORC

Ulm, Germany - 15 MWth, 5.3 Mwel, gas engine, ORC

Plants in planning: Gothenborg, Sweden - 30 MWth, 20 Mwel, Synthetic

Natural Gas (SNG) production of 67%



Catalytic tar removal

Photographer Hans Ringhofer

Test rig

• 2 stage reformer

• 4 & 4 honeycomb catalysts

• 100 Nm³/h

• ~ 900°C

• Atmospheric pressure

Aims:

• Long term tests of catalytic gas cleaning with

real product gas from an industrial DFB-steam

gasifier (Güssing)

• To find selective catalysts for reforming

hydrocarbons - except Methane => BioSNG

• To find selective catalysts for reforming

hydrocarbons - especially Methane => Fischer-

Tropsch

• To find best process parameters regarding

lifetime and reforming potential of the catalysts.



Further information

Links:

http://www.vt.tuwien.ac.at

http://www.vt.tuwien.ac.at/chemische_verfahrenstechnik_und_wirbelschichttechnik/gasification_and_gas_cleaning/

Contact:

Univ.Prof. Dr. Hermann HOFBAUER

Email: [email protected]

Tel.: +43 1 58801 166300

http://www.vt.tuwien.ac.at/

http://www.vt.tuwien.ac.at/chemische_verfahrenstechnik_und_wirbelschichttechnik/gasification_and_gas_cleaning/

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