General Overview

Environmental Innovative Technology− Sustainable Use of Fossil Fuels and New Energy−
Brief Overview
To contribute to solution of global environmental problems, we promoted scientific assessment of global warming and highefficient utilization technology of biomass energy.
Among them, for scientific assessment of global warming, we carried out numerical simulations of paleoclimate using aglobal earth system model and clarified that the feedback of vegetation changes to clime was significant.
For high efficiency utilization of biomass energy, we assessed performances of biomass co-firing with coal and characteristics of spontaneous ignition for various biomass kinds, and we verified high practical use of our technologies for a carbonizing-gasification gas engine power generation and a dry gas purification by means of demonstration test using food processing residue.
In the technical development relating to environmental problems in the electric power industry, we developed soil purification material for arsenic and lead contamination using hydroxyapatite produced in reaction of phosphorus extracted from sewage
sludge and desulfurized gypsum.

Achievements by Research Theme
Global warming measures research (Integral project)● Warming projection and adaptive measures
・ We confirmed that changes in vegetation greatly influenced on CO2 absorption through calculation of paeloclimate using an earthsystem model.
・ For research on adaptation to unavoidable climate change, we clarified relationship between air temperature rise and typhoon
intensity change at the end of 20th century using re-analysis data from collaboration work with Japan Meteorological Agency.
○ CO2 underground storage・ We determined CO2 underground behavior performance at the field tests and indoor tests to increase accuracy of CO2 underground behavior simulation model.
●High efficiency utilization of biomass energy
・We assessed performances of biomass co-firing with coal and characteristics of spontaneous ignition.
・We demonstrated carbonizing-gasification gas engine power generation technology and dry gas purification technology using
food-processing residue. (Fig.1)
Innovative environment technology○ Innovative environment measurement
・ We developed an economical method to remove PCBs from PCBs contaminated transformer by changing transformer oil,followed by power operation. (Fig.2)
・ We confirmed that simplified measurement method of selenium in wastewater developed by CRIEPI could be adapted for wastewater from power plants.
○ Coal ash environment measures
・ We developed soil purification material for arsenic and lead contamination using hydroxyapatite produced in reaction ofphosphorus extracted from sewage sludge and desulfurized gypsum.
Next generation thermal plant technology○ Integrated operation and evaluation system for pulverized coal combustion power generation
・ We developed the numerical simulation basis code to estimate pulverized coal combustion characteristics. (Fig.3)○ Coal gasified furnace
・ To support IGCC demonstration plant operation, we predicted gasification performance by numerical simulation and clarified
gasification characteristics by CRIEP's “coal gasifier for basic research” to actual tested coal.
○ Trace element control
・ We developed prediction method for boron behavior in coal fired power plants.
・ From coal properties and operating condition of exhaust gas processing facilities, we assessed quantitatively boron concentrationin clinker, fly ash and desulfurization wastewater.
○ Low cost MCFC power generating system
・ We developed low cost separator technology and electrolyte pre-impregnation technology at a single cell to develop a low coststack.

10Environmental innovative technology

Global warming measures research (Integral project)Ab) Hot Gas Cleanupa) Gas Engine Power Generation（Joint Research with The Kansai Electric Power Co., Inc.)

Fig.1 Demonstration Facility of Biomass Gasification Power Generation System

Innovative environment technology

Next generation thermal plant technology

Fig.2 Transformer cleaning by electric

Fig.3 Comparison of gaseous temperatureconnection

distribution in coal combustion furnace

PCBs are leached from the transformer core withincrease of oil temperature by electric connection after
renewal of the insulating oil.

The simulation code for the pulverized coal combustion
which can compute the multiphase combustion field bymeans of a LES and RANS simulation has been developed. It is confirmed by comparing with the experimentthat the basic combustion characteristics such as gaseous
temperature distribution can be precisely predicted by thesimulation code.

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