GHG and Energy

The Mitsui Chemicals Group is striving to reduce the GHG emissions and energy consumption by adopting a low-carbon manufacturing approach under its climate change policy.

*Please refer here for other information concerning climate change.

GHG Emissions and Energy Consumption

In response to increasingly serious environmental problems and growing demands for global decarbonization, the Mitsui Chemicals Group announced 2050 Carbon Neutrality Declaration in November 2020, and set a Group target in June 2021 to reduce the Group's global GHG emissions by 40% (compared to FY2013) by FY2030. To achieve these targets, we will actively engage ourselves in increasing adoption of low-carbon raw materials and fuel, promotion of energy efficiency, conversion to renewable energy, and creation of process innovation technologies to build a low-carbon society.
In addition, for FY2021, Mitsui Chemicals has set a target of reducing GHG emissions by at least 20,000 tons by saving energy (on a full-operation basis, compared to FY2020) and outperformed the target with a reduction of 29,000 tons through energy-saving initiatives at plants, such as gradually enhancing heat recovery capabilities and streamlining the refining process.

GHG Emissions reduction rate (Scopes 1 and 2)

*compared to FY2013

GHG Emissions reduction rate (Scopes 1 and 2)

Mitsui Chemicals Group's GHG emissions for FY2021 (Scopes 1 and 2) have slightly decreased compared to FY2020, partly due to the scheduled inspection and maintenance at overseas plants. Regarding energy consumption, our target is to achieve at least 1% reduction in energy intensity on a five-year average basis, but the reduction rate was only 0.2% for FY2021, because we implemented energy-saving measures and operated in increased capacity. Going forward, we will continue to aim for a five-year annual energy intensity reduction rate of at least 1%, which is a non-binding target under the Act on Rationalizing Energy Use.
In addition, we calculate GHG emissions regarding Scope 1 and 2 emissions generated from in-house operations and production activities as well as Scope 3 for indirect emissions in order to identify GHG emissions throughout the entire supply chain, extending from purchasing raw materials to customer use and disposal.

GHG Emissions (Scopes 1 and 2)

GHG Emissions (Scope 1 and 2)

Energy Consumption

Energy Consumption

*Scope of Japan and overseas affiliates: Consolidated subsidiaries

*GHG emissions calculated in accordance with Japan’s Law Concerning the Promotion of Measures to Cope with Global Warming based on energy consumption figures for overseas consolidated subsidiaries.

*The gases used to calculate GHG emissions are CO2, CH4, N2O, HFC, PFC, SF6, NF3.

Energy Intensity (Mitsui Chemicals, Inc.)

Energy Intensity (Mitsui Chemicals, Inc.)

*Energy intensity denominator is ethylene conversion production volume.

GHG Emissions (Scope 3) (Mitsui Chemicals, Inc.)

GHG Emissions (Scope 3) (Mitsui Chemicals, Inc.)

Breakdown of GHG Emissions (Scope 3) (Mitsui Chemicals, Inc. Fiscal 2020)

Category Emissions (Thousands of tons CO2eq / year)
01: Purchased goods and services 2,945
02: Capital goods 128
03: Fuel- and energy-related activities (not included in Scope 1 and 2) 249
04: Transportation/distribution (upstream) 50
05: Waste generated from operations 37
06: Business travel 1
07: Employee commuting 5
08: Leased assets (upstream) 1
11: Sold product specifications 2,810
12: Sold product disposals 2,287
15: Investment 812
Total 9,326

[Calculation Method]

Basic Guidelines for Calculating Greenhouse Gas Emissions Via Supply Chains (Ver. 2.3), Ministry of the Environment and Ministry of Economy, Trade and Industry. Based on the Basic Guidelines for Calculating Greenhouse Gas Emissions Via Supply Chains (Ver. 2.4) published by the Ministry of the Environment and Ministry of Economy, Trade and Industry, we used emission factors provided by IDEA and the Act on Promotion of Global Warming Countermeasures calculation/reporting/disclosure system, and emission units formulated by the Ministry of Environment.

Highly Efficient Gas Turbine Power Generation System for Self-Sufficiency

Mitsui Chemicals installed a highly efficient gas turbine power generation system in its Osaka Works and commenced operation in December 2020. This was a joint project with Daigas Energy Co., Ltd. under a grant from the 2018 Subsidy for Promoting Investment in Energy Saving provided by the Ministry of Economy, Trade and Industry.
The system increases the Works’ self-sufficiency in power. It also reduces fuel usage by the naphtha cracking furnaces in the ethylene plant by taking the high-temperature exhaust gas generated by the power generation facilities for use as the combustion air in the furnaces. This is reducing CO2 emissions from Osaka Works by 70,000 tons per year (compared with fiscal 2016).

Energy-Saving Process Using LNG Cold Energy

Together with Osaka Gas Co., Ltd., Mitsui Chemicals and its group company, Osaka Petrochemical Industries, Ltd. have adopted energy-saving process by using liquefied natural gas (LNG)-generated cold energy in the ethylene plant. This world-first energy saving process using LNG-generated cold energy on a large-scale at our ethylene plant commenced in October 2010.
To transport and store natural gas, it is liquefied by cooling it to -160°C. Liquefied gas is a good source of cold energy. During its liquefied state, LNG emits boil off gas which has auto-refrigeration properties. When returning LNG to its gas state, it continues to retain superior cooling abilities. At Mitsui Chemicals’ Osaka Works OPC ethylene plant, after thermal decomposition of naphtha (crude gasoline) at high temperatures, base materials such as ethylene and propylene are separated and purified by cooling the cracked gas. By efficient use of LNG cold energy from the adjacent OPC ethylene plant of Osaka Gas Senboku Works, a significant reduction in CO2 emissions was possible.

CCU (Carbon Capture Usage) Technologies

Mitsui Chemicals took part in the CCU Project (CO2 + H2 ⇒CH3OH +H2O) lead by the Research Institute of Innovative Technology for the Earth (RITE) (commissioned by NEDO), and developed a high activity catalyst. Refinement of this highly active catalyst eventually was tested by the pilot plant of CCU technology in Mitsui Chemicals Osaka Works in 2009. This was a verification test, producing 100 tons of methanol per year from hydrogen and CO2 which was contained in the exhaust gases. We have confirmed the conversion ratio from CO2 to methanol and the catalyst life and obtained necessary data items for creating a technological package. However, due to several issues that remained to be addressed concerning costs and availability of hydrogen source, this technology has not yet been commercialized. Nevertheless, we believe that this promising technology should greatly contribute to the realization of low-carbon society which is currently sought by the world.

  • Get Adobe Acrobat Reader

    Free and safe download. Adobe Reader latest version