The ammonia is produced using atomospheric nitrogen and hydrogen which is produced mainly by the hydrocarbons such as the natural gas, and it is used as raw materials for such as fertilizer or the chemical.


In 1960's, TOYO had its own ammonia process and had licenced it to Japanese, Korean, Indian and Bangladesh customers. In 1968, based on detailed investigations of a large scale ammonia plant designed, TOYO decided to execute a general license agreement with KBR. In 1969, TOYO builts and commissioned its first 1,000 t/d class ammonia plant in Japan by integrating its own experience and know-how in designing ammonia plant with the KBR process. At the same time in 1969, TOYO was awarded a contract for a 1,360 t/d plant by a customer in the former USSR. The plant was the largest ammonia plant in the world at that time; it was followed by licensing KBR ammonia plants worldwide. Up to now TOYO's experience in ammonia plant including the plants based on our own and other processes amounts to 78 projects. In accordance with the current market requirements for large scale plant, TOYO has built a 2,050 t/d ammonia plant in Iran, the capacity of which is the largest capacity in the world. As a technology oriented contractor, TOYO has always endeavored to improve plant efficiency and to reduce plant life cycle cost by, for instance, applying the high activated steam reforming catalyst, ISOP catalyst, which was developed by TOYO.

TOYO's strategy for efficiency and the requirement of large-scale plant

TOYO is now in a position to license the most advanced ammonia technology from KBR, such as KBR's top-fired steam-methane reformer (SMR) and/or KBR Reforming Exchanger System (KRES™) for reforming, KBR's proprietary cryogenic Purifier process (Purifier™) for impurity removal, Horizontal Synthesis Converter with magnetite synthesis catalyst or KBR Advanced Ammonia Process (KAAP™) with proprietary promoted ruthenium on graphite catalyst for ammonia synthesis. These process units are already in operation and well proven in commercial plants.

PurifierPlus™ Simplified




Cold box impurity removal (Purifier™)

Horizontal Synthesis Converter

Magnetite synthesis catalyst based synthesis

KAAP™ Reactor

Ruthenium based high active low pressure ammonia synthesis

※KRES is a trademark of KBR, Inc.
※Purifier is a trademark of KBR, Inc.
※KAAP is a trademark of KBR, Inc.

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