PILOT PLANT EXPERIMENTS FOR SYNGAS GENERATION...
Transcript of PILOT PLANT EXPERIMENTS FOR SYNGAS GENERATION...
Magnus Marklund1* Henry Hedman1 Fredrik Weiland1,2
PILOT PLANT EXPERIMENTS
FOR SYNGAS GENERATION VIA BIOMASS GASIFICATION
5th International Freiberg Conference on IGCC & XtL Technologies,
21 – 24 May 2011, Leipzig, Germany
Energy Technology Centre
Magnus Marklund1* Henry Hedman1 Fredrik Weiland1,2
Managing Director Senior laboratory engineer Research Ass./PhD Candidate
1Energy Technology Centre, Piteå, Sweden2Luleå University of Technology, Luleå, Sweden
*Contact: [email protected]
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Location
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”The Earth got fever…
and it is rising…
But we can help it!”
Motivation
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One Solution: Sustainable Forestry
Forest Residues in Sweden:
~70 TWh/yr(estimated by 2050)
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Fuel Potential for Sweden
RME
Ethanol from wheat
Ethanol from wood
Synthetic diesel from wood5 300
4 500
3 800
2 000
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Synthetic diesel from wood
Synthetic Diesel - black liquor
DME / Methanol - wood
DME / Methanol - black liquor11 000
9 000
6 500
5 300
km
ha, yr Source: Volvo AB
Could replace ~100 % of today's
fossil use by trucks by 2050!
ChemrecBLG Plant
Smurfit Kappa Kraftliner Piteå
ETC Site View
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ETCGasification
Centre
BioDME Plant
ETC PEBGPilot plant
PEBG ProgressPEBG = Pressurized Entrained flow Biomass Gasification
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Start
April
2009
PFD
Nov
2009
Component
Design
February
2010
Assembly
May
2010
Control
System
December
2010
1st Heat up
April
2011
Pressurised
O2 gasification
October
2011
LPG
Oxidant (O2/N2)
Inert (N2)
FI
TC
Gas analyses (FTIR/MicroGC)
Particulate sampling
Cam
Lock
hopper 1
Lock
hopper 2
Fuel feeder
Flare
Pilot flare
Syngas flow meter
PEBG Process
Fuel
Silo 1
Fuel
Silo 2
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Cooling water
Quench water outlet
TC
TC
TC
TC
Reactor
Quench
Pressure
regulator
Quench spray registers
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Considered Fuels & Conditions
Property Unit Stem wood Spruce bark Blend bark*
LHV MJ/kgDS 19.6 19.6 20.8
Dry Substance (DS) % 96.3 92.9 97.2
Ash content % 0.36 4.2 2.2
C %-DS 50.9 52.2 52.6
H %-DS 6.3 5.6 6.4
O %-DS 42.4 37.5 38.3
Values
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Operational Condition
Paramater Unit Value
Fuel load kg/h 40.0
Lambda - 0.45
Pressure bara 2.0
Oxygen concentration % 70
*Blend bark from paper mill with ~30%-wt birch bark
O %-DS 42.4 37.5 38.3
(~200 kW)
Fuel Powder Generation
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250 µµµµm
Process OperationDisturbances from irregular nitrogen
addition to the fuel silos
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Resulting Gas Composition
Avaraged µµµµGC values during stable operation:
Fuel Temp (C) H2 N2 CH4 CO CO2 C2H4 C2H2 H2/CO
Steam wood 1218 23 19 1.8 39 17 0.11 0.22 0.57
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→ Cold Gas Efficiencies 70 – 80 %
Spruce bark 1126 23 18 1.9 40 15 0.08 0.11 0.57
Blend bark 1213 24 17 1.5 43 14 0.04 0.12 0.55
Particulate Matter
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Soot with trace of Potasium Soot with trace of Zn and Alkali
On-going work will reveal morphology, crystalline structure and elemental comp.
Conclusions
• Stable gasification of forest residues has been achieved
in PEBG pilot (acc. operation ~150 h).
• Relatively fine powders are needed for current burner.
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• The resulting syngas has a H2/CO ratio ~0.55.
• Sampled particulate matter mainly contain soot.
• Further on-going work will be published in journals.
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Near Future Work
• Additives to control slag formation with varying fuels
• Trails with torrefied biomass, pyrolysis oil, and crops.
• Characterize conversion atmosphere in reactor and
formation of soot, tar and char.
Ash Slag Droplet from Quench
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Acknowledgements
All involved in the PEBG project 2009-2012
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