Tokyogasgroup csr report

The Tokyo Gas Group Value Chain

Benefits of LNG (Liquefied Natural Gas)

For more than 40 years since it first introduced LNG to Japan in 1969, the Tokyo Gas Group has worked to establish and advance its LNG value chain in an effort to spread and expand the use of natural gas, which excels in environmental soundness and supply security. The benefits of using LNG as a feedstock for city gas are as follows.

Benefits of LNG as Feedstock for City Gas

About LNG
LNG is produced by cooling natural gas, which is primarily composed of methane, to its liquid state. Methane is a gas at zero degrees Celsius under one atmospheric pressure and changes into a liquid when cooled to 162 degrees below zero Celsius, its cubic volume diminishing by six hundred times. Using this property to transport natural gas in the form of LNG on carriers allows for the transport and use of massive volumes of natural gas in regions where it cannot be delivered via pipelines.

Low Pollution

LNG is a clean source of energy without any hazardous substances such as SOx. When burned, it produces 20% to 40% less CO2 compared to oil, coal and other fossil fuels.

Comparison of Emissions during Combustion (Coal = 100)
Comparison of Emissions during Combustion (Coal = 100)
Source: Agency for Natural Resources and Energy, Energy White Paper 2013

Supply Security

The abundance of natural gas reserves around the world ensures a stable supply of raw material, which is fundamental to providing a long-term supply of city gas to customers. Also, the calorific value of city gas produced from LNG today is 2.15 times* higher than that of the gas initially produced and supplied by Tokyo Gas. This has increased our transport and storage capacity, enabling us to respond efficiently to any rise in demand.

*Calorific value of gas produced by Tokyo Gas
  Calorific value of current city gas based on LNG: 45 MJ/m3 (10,750 kcal/m3)
  Calorific value of gas initially produced by Tokyo Gas: approx. 21 MJ/m2 (5,000 kcal/m2)

Economic Advantages of Production

City gas using LNG as feedstock is produced by pouring seawater to vaporize LNG stored in a tank at minus 162°C and adjusting the calorific value. The process does not require large-scale manufacturing facilities, thereby keeping production costs down.

High Efficiency of Transport

After natural gas is vaporized to produce city gas at the LNG terminal, it is directly delivered to the point of consumption through pipelines, thus causing no loss due to energy conversion or transportation.
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.