DIAMOX process

The DIAMOX process, which was developed jointly by Mitsubishi Chemical Industries (MCI) and Mitsubishi Kakoki Kaisha (MKK) in Japan, is described by Hiraoka et al. (1977) and Fumio (1986). The flow arrangement is similar to the basic scheme shown in Figure 4-24. It is claimed that the process will remove over 98% of the hydrogen sulfide from coke-oven gas and produce a purified gas stream containing less than 8 grains of hydrogen sulfide per 100 scf. 

Table 4-15 shows the utility requirements for the DIAMOX process for two levels of COG desulfurization. The DIAMOX process does not require any chemicals since the absorption liquor is generated from the ammonia present in the COG. 

Utilities for DIAMOX Process for Two COG Desulfurization Levels (Basis 500 grains HjS/lOO SCF at Inlet, 90 MMSCFD capacity)... 

Fumio, S., 1986, Diamox Process in Process Handbook 3, Mitsubishi Kakoki Kaisha, Ltd. Kawasaki, Japan. 

Hiraoka, H., Tanaka, E., and Sudo, H., 1977, DIAMOX Process for the Removal of H2S in Coke Oven Gas, in Symposium on Treatment of Coke Oven Gas, McMaster University Press, McMaster University, Hamilton. Ontario, Canada. 

Carl Still (2) A process for removing hydrogen sulfide from coke oven gas by scrubbing with aqueous ammonia, itself derived from coke oven gas. Developed in the 1970s by Firma Carl Still, Germany. Operated at the ARMCO steel mill at Middleton, OH. See also Diamox, Still. 

DIAMOX A process for removing hydrogen sulfide and hydrogen cyanide from coke oven gas by absorption in aqueous ammonia. Developed by Mitsubishi Chemical Industries and Mitsubishi Kakoki Kaisha and operated in Japan. 

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