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]

1

Location

Energy Technology Centre2

”The Earth got fever…

and it is rising…

But we can help it!”

Motivation


One Solution: Sustainable Forestry

Forest Residues in Sweden:

~70 TWh/yr(estimated by 2050)


Fuel Potential for Sweden

RME

Ethanol from wheat

Ethanol from wood

Synthetic diesel from wood5 300

4 500

3 800

2 000


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


ETCGasification

Centre

BioDME Plant

ETC PEBGPilot plant

PEBG ProgressPEBG = Pressurized Entrained flow Biomass Gasification


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


Cooling water

Quench water outlet

TC

TC

TC

TC

Reactor

Quench

Pressure

regulator

Quench spray registers

8

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


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


250 µµµµm

Process OperationDisturbances from irregular nitrogen

addition to the fuel silos


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


→ 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


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.


• 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.

14

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


Acknowledgements

All involved in the PEBG project 2009-2012


PILOT PLANT EXPERIMENTS FOR SYNGAS GENERATION...

Documents

Transcript of PILOT PLANT EXPERIMENTS FOR SYNGAS GENERATION...