We promote a broad range of initiatives to combat climate change with the aim of helping mitigate global warming, the central theme of our environmental protection efforts. Of particular note, we are taking steps to reduce energy consumed per unit of production at gas production facilities, promoting energy-saving measures at various sites, and striving to increase the efficiency of transport by tanker truck.
We also promote the development of products that reduce our impact on the environment and propose solutions that contribute to global environmental protection.
Environmental Impact of Oxygen, Nitrogen, and Argon Production
The production of the Nippon Sanso Holdings Group’s core air separated gases (oxygen, nitrogen, and argon) requires a considerable amount of electric power.
Air separation units produce oxygen, nitrogen, and argon simultaneously by separating atmospheric air into its constituent gases. Air is first compressed, a process that is highly energy intensive and thus uses a significant amount of electric power. Compressed air is cooled almost to the point where the gases liquefy. After this, it is ready for the distillation column, where it is separated into its gas and liquid components using a thermal distillation process. Nitrogen, which has a low boiling point, concentrates in the gas and is withdrawn from the top of the column, while oxygen, which has a higher boiling point, concentrates in the liquid and is withdrawn from the bottom of the column. Argon, which has an intermediate boiling point, is withdrawn from the middle of the column.
Air Separation Unit: Simplified Process Flow
Preventing Global Warming
Our efforts to contribute to the prevention of global warming center on reducing energy consumption at gas production facilities. We have established an Environmental Contribution Investigation Working Group as a subsection of our Environmental Management Committee to improve energy consumption per unit of production. In FYE2020, consumption of energy per unit of production by such facilities was down 2.9% from FYE2006, the base year used for this measurement, reflecting the installation of energy-saving type air separation units and other measures.
Moreover, these facilities’ consumption of electric power per unit of production was down 29.5% from FYE1991. Efforts by gas production facilities to reduce energy consumption included developing and installing energy-efficient air separation units, replacing air separation unit components with new high-efficiency versions and optimizing facility operations to better reflect demand.
These facilities also promote initiatives in line with the Commitment to a Low-Carbon Society plan formulated by the Keidanren (Japan Business Federation) and the Japan Chemical Industry Association (JCIA)’s action plan for realizing a low-carbon society.
Electricity Consumption at Gas Production Facilities＊ in Japan / Energy per Unit of Production Index
|Challenges and targets
||Progress as of FYE2020
|1. Promote energy-saving measures at various sites to reduce electric power consumption
(Target: Average annual reduction of 1.0% over the medium to long term)
- Cut unnecessary electric power consumption by office and lighting equipment
- Replace air conditioning, office equipment, lighting, shared, and other equipment with energy-efficient new models
- Implement no overtime days and Cool Biz (liberal summer dress code to reduce use of air conditioning)
|All Taiyo Nippon Sanso sites (excluding gas production facilities)
|2. Increase the efficiency of transport by tanker truck to reduce fuel used in the transport of products
- Optimize shipping routes
- Rethink delivery intervals
- Promote the weighing of cargo in the presence of the customer
- Introduce new-model tanker trucks
- Reinforce green driving training
|Group and subcontracted logistics companies＊1
|3. Contribute to environmental protection through our products by increasing sales of environment-friendly products
||Take steps to bolster sales of hydrogen refueling stations, SCOPE－JET®, MG Shield®,SF6 recovery service, Thermos products, nitrogen supply systems for laser processing, and combustion-type gas abatement systems
||Contribution to overall reduction: 2,373,000 tonnes of CO2＊2
||Nippon Sanso Holdings and its consolidated subsidiaries in Japan
＊1 For information on relevant companies/departments/sites, please see the Sustainability Data Book.
＊2 Contributions to the reduction of greenhouse gas (GHG) emissions were calculated in accordance with Japan’s Ministry of Economy, Trade and Industry’s Guideline for Quantifying GHG Emission Reduction Contribution (formulated in March 2018).
Environmental Inputs and Outputs of the Nippon Sanso Holdings Group’s Operating Activities