natural gas as feedstock in towngas production
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Natural Gas as Feedstock for Natural Gas as Feedstock for Natural Gas as Feedstock for Natural Gas as Feedstock for Town Gas ProductionTown Gas Production
HKIE / IGEM Joint Gas SeminarHKIE / IGEM Joint Gas Seminar
24 April 201324 April 2013Ir. Chris Man
GM Gas Production
1 / 18
H.K. & China Gas Co. Ltd.
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HKCG (Towngas) ProfileHKCG (Towngas) Profile
1862 - Established in England
- 35,000 capital
Core Business ( Hong Kong )- Gas supply & supporting services- > 1.75 million customers, p
- HKs oldest public utilities
1864 - Gas produced at West Point Work
Supply 500 gas lamps in
1.75 million customers- > 3,500 km HP & LP network- listed company, Market Cap ~ HK$200B
Diversified Business ( Hong Kong )l- Supply ~ 500 gas lamps in
Central (today) area
- 24 km low pressure network
- Telecommunication- LPG Filling Station- Landfill Gas etc.
Mainland China Business ( Over 150 JVs )
2 / 18
Mainland China Business - City Gas- Water Business- New Energy Business
( Over 150 JV s )
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Gas Production MilestoneGas Production MilestoneHKCG
foundedFeedstock change to
heavy oilTai Po Gas Plant
commence operationIntroduction of NG
to Tai Po Plant
1862 1864 1967 1973 1999 2006 20071986
C l i
3 / 18
Commence supplying town gas with coal as
feedstock
Feedstock change to Naphtha
First LFG utilization project in Shuen Wan
NENT SNG Plant
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Naphtha Unloadingg
Tai Po Plant
MTK Plant
Aberdeen Gas Holder
4 / 184 / 18
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- Twin 34 km
Di 450
- Twin 34 km
Di 450 - Diameter: 450 mm
- Working Pressure: 90 Bar Max
- Diameter: 450 mm
- Working Pressure: 90 Bar Max
5 / 185 / 18
5 / 18
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Tai Po Plant Tai Po Plant Key DatesKey Datesyy
Project Started Commenced Operation
Phase I March 1985 December 1986
Phase II January 1990 December 1992
115% & NG Modifications
March 2003 September 2006Modifications
6 / 18
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Tai Po Plant LayoutTai Po Plant Layout
Phase I
Phase II Naphtha Storage Tanks
Natural Gas Receiving Station
Air Compressors Stationp
7 / 187 / 18
7 / 18
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Tai Po Gas Production PlantTai Po Gas Production Planta o Gas oduct o a ta o Gas oduct o a tPlant Capacity Phase I = 4 x 700,000 Sm3/day (NG)
Phase II = 4 x 1,400,000 Sm3/day 4 x 805,000 Sm3/day (Naphtha only)
(NG)y
Feedstock Naphtha (Sulphur
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CRG Process CRG Process Town Gas from Naphtha and NGTown Gas from Naphtha and NGTown Gas from Naphtha and NGTown Gas from Naphtha and NG
SDe-
sulphurisation
SteamNG Feed NG Feed
CRG Reactor
Reformer
Naphtha Feed De-
sulphurisation
CO Heat CO
Air Odour
CO Converter
Heat Recovery
CO2Absorber
R l G
Town Gas
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Recycle Gas
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Tai Po Gas CharacteristicsTai Po Gas Characteristics
Chemical Composition %Chemical Composition %Carbon Dioxide (CO2) 16.3 - 19.9Carbon Monoxide (CO) 1.0 - 3.1( )Methane (CH4) 28.2 30.7Hydrogen (H2) 46.3 - 51.8
Physical Properties
Nitrogen & Oxygen (N2 & O2) 0 - 3.3
y p
Calorific Value (MJ/m3) 17.27
Specific Gravity 0.52p y
Wobbe Index 24.00
Weaver Flame Speed 35.00
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p
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Natural Gas as Feedstock (I)Natural Gas as Feedstock (I)Natural Gas as Feedstock (I)Natural Gas as Feedstock (I)
Advantage (1) - More Reliable
Dual feedstock improve supply security
Revert back to 100% naphtha when required Revert back to 100% naphtha when required
Natural Gas currently 55 60% of input
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Natural Gas as Feedstock (II)Natural Gas as Feedstock (II)Natural Gas as Feedstock (II)Natural Gas as Feedstock (II)
Advantage (2) - More Economical
25 year contract cheaper & more stable price than naphtha
Benefits pass back to customers ~ 10% price reduction since Q4 2006~ 10% price reduction since Q4 2006
HK$ 9.5 billion accumulated saving to gcustomers up to Dec 2012
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Natural Gas as Feedstock (III)Natural Gas as Feedstock (III)Natural Gas as Feedstock (III)Natural Gas as Feedstock (III)
Advantage (3) - More Environmental
Natural Gas is cleaner# CO2 : ~ 21% reduction NOx : ~ 50% reduction SOx : ~ 30% reduction
Accumulated CO2 reduced up to Dec 2012 ~ 533 000 MT ~ 23 million Trees ~ 533,000 MT ~ 23 million Trees.
13 / 18# 2012 Data
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Why not Direct NG Supply ?Why not Direct NG Supply ?Why not Direct NG Supply ?Why not Direct NG Supply ?
S i Security Single Source of NG from Dapeng LNG Terminal
CostHuge investment involved for converting 1 7 Huge investment involved for converting 1.7 million+ customers, HK$ Billions
I i Inconvenience Need to open up large portion of existing
d d i li k f i i underground pipeline network for sectorization over a 10 years period
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Further NG UtilisationFurther NG UtilisationFurther NG UtilisationFurther NG UtilisationHKCG founded
Feedstock change to heavy oil
Tai Po Gas Plant commence operation
Introduction of NG to Tai Po Plant
MTK NG Conversionfounded heavy oil commence operation to Tai Po Plant Conversion
1862 1864 1967 1973 1999 2006 20071986 2013
15 / 18
Commence supplying town gas with coal as
feedstock
Feedstock change to Naphtha
First LFG utilization project in Shuen Wan
NENT SNG Plant
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MTK NG ConversionMTK NG ConversionExisting pipeline
Tai Po Plant to Shatin(make use one of the existing 750mm dia. submarine pipeline)
New U/G pipeline to be constructed Shatin Section ~ 6.7 km Kowloon Section ~ 5 8 km Kowloon Section ~ 5.8 km
New pipeline to be constructed in Tunnel Beacon Hill Tunnel Section ~ 2.2 km
Commence modification at 2009 Target commissioning at 2013
Legend
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LegendU/G PipelineTunnel Section
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Greener Energy TargetedGreener Energy TargetedGreener Energy TargetedGreener Energy TargetedHKCG
foundedFeedstock change to
heavy oilTai Po Gas Plant
commence operationIntroduction of NG
to Tai Po PlantMTK NG
Conversionfounded heavy oil commence operation to Tai Po Plant Conversion
1862 1864 1967 1973 1999 2006 20071986 2013 SENT WENTOWTF>65% NG
65% NG
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Thank You
Question are welcome
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Naphtha Vapouriser
Convert S to H2S H2S Absorbers
2 R-S + 3 H2 2 H2S + 2 R-H19 / 18
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2 R S + 3 H2 2 H2S + 2 R H
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CRG Reactors
20 / 1820 / 18
Naphtha + Steam CH4 + H2 + CO
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Tubular Tubular Reformer
21 / 18CH4 + H2O 3 H2 + CO
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CO Converter
CO + H O CO + H22 / 18
22 / 18
CO + H2O CO2 + H2
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H2O + K2CO3+ CO2 2 KHCO3
CO2 Carbonate CO2Absorber Regenerator
23 / 1823 / 18
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Drying Drying System
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Od t THTOdorant THT
25 / 1825 / 18
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Phase IPhase I
26 / 1826 / 18
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Phase IIPhase II
27 / 1827 / 18
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Naphtha Storage TankNaphtha Storage TankssNaphtha Storage TankNaphtha Storage Tankss
28 / 18
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Natural Gas Receiving StationNatural Gas Receiving Station
29 / 1829 / 18
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Air Compressors StationAir Compressors Station
30 / 1830 / 18
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