Upload
others
View
0
Download
0
Embed Size (px)
Citation preview
Energiforsk
GobiGas- Bio-Methane from Forest Residues
Jonas Dahl
Bröndby 17 November 2015
Energiforsk –Swedish Energy Research Centre (new organization since 1 Jan 2015)
Owners : Swedish electric power association (30%) - Svensk Energi AB Swedish Power grid owner (20 %) - Svenska KraftnätSwedish district heating association (20 %) - Svensk Fjärrvärme ABSwedish gas association (15 %) - Energigas SverigeThe Swedish TSO (15 %) - Swedegas AB
Energiforsk in short
• Office in Stockholm and Malmö, Sweden• 21 employees, annual turn-over (2015) 23 MEUR• Core business: To develop new knowledge and financing
opportunities for developing energy R&D that leads to a more sustainable and efficient future energy system
Staten direkt vs. Trippel-helix
4
Staten Akademien
Industrin
Staten Akademien
The Story of the GoBiGas ProjectFrom Vision to Plant in Operation
Ingemar Gunnarsson Göteborg Energi
GoBiGas – Pioneering New Technology• The world’s first plant for bio methane from biomass through
gasification • The first Swedish plant to inject bio-methane into the
interregional grid
6IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
Quick history of GobiGas
• 2005 - Project started- Feasibility studies developed - bio-methane production from forest residues –- Comparing different gasfication & methanation technologies
• 2006 - Ambition to build a commercial sized plant, delivering 100 MW biomethane- Decision to split in 2 phases- A demonstration plant (20 MW) to be followed by a commercial plant (100 MW)
• Sept 2009 - Awarded funding from the Swedish Energy Agency sept 2009 for Demo - (220 mil SEK => 25 % of estimated CAPEX at time => current bill 1, 5 bil SEK)
• 2010 (Dec 16) - Board decision to implement after EU approved government support • 2011 – 2012 Engineering & Construction• 2012 - 2013 Construction & Commissioning
- 13/11 2013 First period of gasification• 2014 - 2015 Start-up
- 15/12 2014, 18:40, The first delivery of SNG out on the gas grid• 2015 Production! With troubleshooting and optimization of operation
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
The GoBiGas Site – Phase 1 & 2
Phase 1
Phase 1 – Demonstration Plant (20 MW, Bio-SNG) Partly financed by the Swedish Energy Agency
15 000 cars400 buses
Phase 2
Phase 2 – Commercial Plant after proof of Phase 1and secured financing (100 MW Bio-SNG)Selected project by the EU-commission in NER 300
~100 000 cars
SVEBIO17/09/2015 Malin Hedenskog
Process - the Movie
http://goteborgenergi.streamingbolaget.se/video/156153/link
Gasification Sept 30 2015: 5000 hrs(wood pellets)
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
0
1000
2000
3000
4000
5000
6000
0
100
200
300
400
500
600
700
800
900
100020
13-1
120
13-1
220
14-0
120
14-0
220
14-0
320
14-0
420
14-0
520
14-0
620
14-0
720
14-0
820
14-0
920
14-1
020
14-1
120
14-1
220
15-0
120
15-0
220
15-0
320
15-0
420
15-0
520
15-0
620
15-0
720
15-0
820
15-0
920
15-1
0
Accu
mul
ated
ope
rati
ng ti
me
[h]
Ope
rati
ng ti
me
each
per
iod
[h]
Clogging of gas cooler=>
much more tars thandesign
Reference installations - gasification
Senden, Germany• Repotec technology ½ the size
compered to GoBiGas
• Production of electrical power and district heating
• In operation autumn 2012
Güssing, Austria• Repotec technology 1/4 the size
compered to GoBiGas
• Gas-fueled motor 2 MW el and 4,5 MW district heating
• In operation since 2002 (> 60 000 h)
SVEBIO17/09/2015 Malin Hedenskog
Same technology butmuch less or no issues with tars !
How We Handle Tars
• Activate the Olivine (Mg,Si,Fe)
• What makes the olivine ”active”? How is this activity achieved?
• Addition of K2CO3 activates olivine
Analysis: Dr. Pavleta Knutsson Analysis: Dr. Pavleta Knutsson Analysis: TOP ANALYTIC, BSE-image
Fresh olivine Used olivine Used olivine after K2CO3
Before K After KTotal tar* (g/m3 ) 43,1 13,1Total tar, excl. BTX** (g/m3) 21,8 4,4
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
Gasification Sept 30 2015: 5000 hrs(wood pellets)
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
0
1000
2000
3000
4000
5000
6000
0
100
200
300
400
500
600
700
800
900
100020
13-1
120
13-1
220
14-0
120
14-0
220
14-0
320
14-0
420
14-0
520
14-0
620
14-0
720
14-0
820
14-0
920
14-1
020
14-1
120
14-1
220
15-0
120
15-0
220
15-0
320
15-0
420
15-0
520
15-0
620
15-0
720
15-0
820
15-0
920
15-1
0
Accu
mul
ated
ope
rati
ng ti
me
[h]
Ope
rati
ng ti
me
each
per
iod
[h]
Optimisation and test of fuel feeding
Fuel feeding system
(pressure differences, backflow of hotgas in feedingsystem, …)
Picture by Dr. Claes Breitholtz at Valmet Power AB
Carbonisation in the feedings screw
SVEBIO17/09/2015 Malin Hedenskog
Bio-Methane to grid until September 2015
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
0
2000
4000
6000
8000
10000
12000
14000O
kt 1
4
Nov
14
Dec
14
Jan
15
Feb
15
Mar
s 15
April
15
Maj
15
Juni
15
Juli
15
Aug
15
Sep
15
Accu
mul
ated
pro
duct
ion
[MW
h]
Production of biomethane
CH4 96.5- 97.5%N2 0.6-0.8%H2 2%CO2 0-0.5%
Rest products
SVEBIO17/09/2015 Malin Hedenskog
- RME and activated carbon, separated tar from raw gas cleaning arecombusted in the combustion part of the gasifier
- Currently, no bottom ash due to low ash content of wood pellets . All ash is removed as filter fly ash which is partly reintrodued due to content of activated bed material
- Fly ash is send to deposit due to Cr6 in the olivine sand => other bed materials in the future would omite this
ProductionBio-methane 160 GWh/ yr
2200 Nm3/hrDistrict Heating 50 GWh/yrConsumptionFuel 32 MWElectricity 3 MWRME (bio-oil) 0,5 MW
Overall performance goals• Biomass to bio-methane > 65 %• Energy efficiency > 90%• Operation 8000 h/year
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
Production and performance Goals
Efficiency of Gasification ProcessGasificationProcess
Max Biomethane
Cold Gas Efficiency Gasification reactor 84.2 % 69.0 %Cold Gas Efficiency Gasification process 76.5 % 62.7 %
Total Efficiency(Cold Gas + District heating)
85.4 %
Heat Losses 14.6 %
Heat Loss to Flow Gas 2,0%Heat Loss to Cooling Water 9,6%Heat Loss to Surrounding 3,0%
• The gasification process has been successfully demonstrated for syngas production of up to 6900mn
3/h
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
SVEBIO17/09/2015 Malin Hedenskog
GoBiGas – where vision becomes reality
Conclusions
• GoBiGas is now online
• Major hurdles have been solved in the gasification stage and the gasifier now operates at full load.
- Alkali needs to be in balance to achieve sufficient reduction and simplification of tars
- Fuel feeding into the bed needs attention and reconstruction is probably required to enable 8000h/year operation
• Optimization of carbon filter beds for benzene removal now restricts the unit to go to full load
Forest residues reception & conveying – 2016(wood chips, feb 2016)
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
Commercial Success or not ? Phase 2 ?Variable Oil Prices
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson
ProjectStart
Pilot Study Investment Decision
Construction of Plant
Start Up and Operation
Thank you for your attention!
www.goteborgenergi.sewww.gobigas.se
IEA Bioenergy 27/10/2015 Ingemar Gunnarsson