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Environmental Conservation

Engineering for Optimization of the Relationship between Environment and Society

Globally, the world faces many environmental issues—first and foremost, the reduction of carbon dioxide emissions. JGC has steadily accumulated a record of successful achievements in upstream environmental technologies, including desulfurization plants for reduction of SOx pollution, as well as various types of energy saving facilities. JGC also has experience in downstream areas such as sewage sludge treatment and soil decontamination. In the field of sewage treatment, JGC has successfully commercialized a sewage sludge melting facility that melts and re-solidifies sludge using glass beads, to form a versatile recycled material suitable for many different uses.

Flue-Gas Desulfurization/Flue Gas Denitrification

JGC provides engineering and construction services for flue gas desulfurization, including both wet methods (Limestone-Gypsum process and magnesium hydroxide process), and dry methods (solid absorbent process, activated carbon method). Domestically and internationally, JGC has constructed two facilities each for Limestone-Gypsum process and magnesium hydroxide process, as well as one facility for simultaneous desulfurization and denitrification by activated carbon and another facility for the solid absorbent process.

JGC Catalysts & Chemicals produces catalysts for denitrification of flue gas, which JGC uses in our engineering and construction of denitrification facilities.

Domestically and overseas, JGC has completed more than twenty such facilities for use in power generation, oil refining, petrochemical, and steel production plants.

Sour Gas removal

JGC provides the optimization study, selection of process, basic design, detailed design and procurement, construction work contract and operation support in regard to the elimination of hydrogen sulfide, mercaptan, COS and sour gas including carbon dioxide from gas/LPG at oil refinery plants, gas plants, and chemical plants. As for the rich carbon dioxide, JGC can carry out study, design, enforcement, and operation support for the hydrogen sulfide enrichment process. In addition, JGC offers the study and consultancy work in regard to the amine degradation.

JGC has carried out designing and enforcement of more than 90 plants all over the world since 1957.

Sulfur Recovery

JGC's unique process for the sulfur recovery unit uses the Claus method that recovers sulfur from hydrogen sulfide. By using a single thermal Claus burner, a high rate of sulfur recovery from the hydrogen sulfide is achieved together with ammonia decomposition. JGC is a Shell "Scot" licenser for the Claus tail gas treating unit; JGC carries out a total optimization study, basic design, design package creation, detailed design, procurement, construction, and operation support of these technologies and the related facilities. JGC also carries out a selection study, design, procurement, and construction for the Claus sulfur recovery unit, Liquid Redox, and Claus tail gas treating unit that are not JGC proprietary technologies. In addition JGC can perform a design and application study, procurement, construction and operation support for liquid sulfur degasification processes and various sulfur solidification units.

JGC has delivered 42 sulfur recovery units worldwide since 1967. Maximum per diem capacity of sulfur recovery is 3,880 tons. With regard to the Claus tail gas treating unit, JGC has delivered 38 worldwide since 1974. JGC has many project references for liquid sulfur degasification units and sulfur solidification units.

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