Yasunari Matsuno, Ichiro Daigo, Masaru Yamashita and Yoshihiro Adachi
description
Transcript of Yasunari Matsuno, Ichiro Daigo, Masaru Yamashita and Yoshihiro Adachi
Reduction of Environmental Impacts by Development of Industrial Symbiosis in Japan
- Case Studies for Application of Co-production Technologies in Steel Industries and its Reduction Potential
of Greenhouse Gas Emissions -
Yasunari Matsuno, Ichiro Daigo, Masaru Yamashita and Yoshihiro Adachi
Department of Material Engineering, Graduate School of Engineering, The University of Tokyo
Topics Introduction – Backgrounds of this study What is “Co-production” technology Application of Co-production technologies
in Steel industry– Low-temperature Gasification Plant– CO2 Recovery and Utilization System
Results of the case studies Conclusion
To maximize energy, resource,environmental efficiency
Recycle-oriented SocietyKyoto Protocol (Reduction of GHGs)
Industrial symbiosis
Individually optimization
Industry A
Industry BIndustry C
Energy,Resources
Industry A
Industry B
Industry C
Energy,Resources
Example of “Industrial symbiosis”
Jurong Island, Singapore
To develop Jurong Island into a World-Class Chemicals Hub in the Asia Pacific RegionOilco
al
Natural gas
Low
grade oil
Fuel Oil
Stee
l, C
emen
t
Recycle Hub ゙( value chain
cluster )
Environment
Final wastesCO2, Exhaust heat
Products
Wastes
Power, gas
Recycled materialsH2 , Syngas High press. SteamElec. PowerFuels
IGCC Pow
er Plan
t
consumer
Final wastes
Environment
consumer
Chemicals Medicine
Locations of key industries
Steel works
Refineries – Petroleum industry
Ethylene plants – Petrochemical industry
LNG tanks
Potentials to develop industrial symbiosis
Fuels , Energy
Raw materials
Power Generation Manufacturing Pro.
Fuels , Energy
Raw materialsWastes
Power Generation Manufacturing Pro.
Main products ・ Goods ・ Electricity ・ Materials
Large amount of waste heat
(1) Existing System
(2) Co-production System Main products ・ Goods ・ Electricity ・ Materials
Little waste heat
Co-products・ Fuels・ Chemicals・ Steam etc.
Newly Energy Saving Process
What is co-production technology? - Technologies for Industrial symbiosis
Exergy
Material Environment
Capacity operating rate
Energy efficiecy
Exergy
Material Environment
Capacity operating rate Exergy
Material Environment
Capacity operating ratio
Conventional Co-generation Co-production
Energy efficiency Energy efficiency
Industry A
Industry B Industry C
Energy,Resources
Energy,Resources
Industry A
Industry B
Industry C
Goal and scope
・ To expand system boundary to evaluate total environmental impacts
・ To investigate environmental impacts of Co-production technologies (for Industrial symbiosis)
• Gasification plant• Dry ice (cryogenic energy ) production plant with CHP
Steel works
Methodology
・ Industries (capacity, location)・ Waste heat distribution・ Demand and supply of products, energy
2 . To conduct LCA for co-production technologies
- CO2 emissions-
1 . To investigate where to apply co-production technologies
3 . To optimize the transport of products by Linear Planning method
4 . To investigate total environmental impacts
Co-production technology
Current technology
11st Stepst Step
To assess the reduction potential of environmental impacts by co-production technology.
To compare with current technology.
22nd Stepnd Step
To assess the reduction potential of environmental impacts in a industrial cluster scale.
To investigate the demand and supply of energy and products.
To develop a model
33rd Steprd Step
To assess the reduction potential of environmental impacts in a regional (country) scale.
To develop database.
To integrate with other tools.
Power stations
Fuel gasSteel plant with co-production process
Electricity
Demand and Supply
Grid mix
Conventional process
Demand and Supply
Where to apply co-production technologies?
- Waste heat distribution in industries in Japan
Waste heat amount Waste heat distribution
Apply Co-production technology to Steel industry
Electricity
SteelChemical
Waste incin.9%
Paper pulp
Others
Ceramic
Waste heat distribution in steel works
0500
10001500
200025003000
Tcal/
year
冷却水固体ガス
Exhaust gas from Coke oven, BFG
etcCOGLDG etc
WaterSolidGas
Co-production technology (1)
High-temperature
Waste heat
High efficiency gasification plant with high-temperature waste heat (600 )℃
Tar1t
Waste heat at 873 K
1300 McalGasification
plant
Gas
Steam
CO/H2 = 28300Mcal
Methanol5810 Mcal
Electricity
or
Methanol: easy for storage,
Utilizing waste heat
ICFG : Internally Circulating Fluidized-bed Gasifier
Synthesis Gas Combustion Gas
GasificationChamber
Char-CombustionChamber
Fluidizing mediumdescending zone Heat Recovery
Chamber
Fluidizing medium &Pyrolysis Residue (Char, Tar)
Heat TransferTubes
Steam Air
Feedstock(Fuel or Wastes)
Co-production technology (2)
Low temperature waste heat
Dry Ice (cryogenic energy ) production with CHP (Utilizing
waste heat)
Exhaust gas recovery
Waste heat at at 423 K 305kcal
Electricity: 0.176 kWh
Dry ice production process
CHPDI
1kg
Cooling Tower
Chemical Heat Pump
Flashtank
Compressor
CO2 gas from co-production processes
Liquefied CO2 tank
High-stageexpander
Dry-Ice press
Dry-Ice
Gas Cooler Liquefier Sub-cooler
Low-stageexpander
Co-production technology (2)
LCA for Co-production technologies
Fig. CO2 emission intensity for co-products (kg-CO2/kg)
00.050.1
0.150.2
0.25
Dry ice(conventional)
Dry ice (co-production)
Methanol(conventional)
Methanol (co-production)CO
2 emi
ssion
inte
nsity
(kg-
CO2/
kg)
Location of steel works in Japan
Location of methanol consumer in Japan
Location of steel works and methanol consumer in Japan
Total CO2 emissions - Core technology
Fig. CO2 emission intensity of methanol
0.019
0.22
0.013
0.15
0 0.1 0.2 0.3 0.4
Co- production
conventional
CO2 Emissions CO2(kg- )
2 emissions at synthesisCOprocess
2 emissions at the transportCOstage
Total CO2 emission reduction potential in Japan
CO2 emission reduction potential by co-production technologies:Methanol: 0.34 ton-CO2/ton-methanolDry ice: 0.13 ton-CO2/ton-dry ice
Current demand in Japan:Methanol: 1.8 million ton/y, Dry ice: 0.24 million ton/y
Total CO2 emission reduction potential in Japan: Methanol: 0.6 million ton/y Dry ice: 0.03 million ton/y
Other possible application of dry ice
Low temperature crushing of PP pellet
PP pellet (3mm diameter)
Microscope of crushed pp pellet (200μm/div)
Low temperature crushing of PP - Conventional technology
Low temperature crushing of PP - by dry ice
PP pellet :1 kg
Liquefied N2 :9.68 kg
Crushed PP : 1 kg
PP pellet :1 kg
Dry ice :3 kg
Crushed PP : 1 kg
CO2 emissions :2.33 kg-CO2
CO2 emissions :0.23 kg-CO2
Δ2.10 kg-CO2
Potential demand of crushed PP: 0.017 million ton/y (0.64% of total PP)CO2 reduction potential: 0.036 million ton-CO2
Conclusion • Methanol production by co-production technology (gasification plant) will reduce CO2 emissions by 91% compared with conventional technology (92% reduction in production, 90% reduction in transport)
• Total CO2 emission reduction potential in Japan by methanol production : 0.6 million ton-CO2
• Dry Ice (cryogenic energy) production by co-production technology will also reduce CO2 emissions by 64% compared with conventional technology. Total CO2 emission reduction potential in Japan is 0.03 million ton-CO2.
• Other CO2 reduction potential by applying dry ice is being investigated, such as low temperature crushing of PP pellet
Thank you very much for your attention.
For further information; [email protected]