Aluminum for apparatus for ammoniacal H/sub 2/S and HCN removal

Journal Article · Mon Jan 01 04:00:00 EST 1979 · Coke Chem. USSR (Engl. Transl.); (United States)

OSTI ID:5571497

Lebedeva, G N; Kamennykh, B M; Sidorenko, K S; Melikentsov, B I

In recent years, the Soviet coking industry has been turning, in the Eastern plants, towards the ammoniacal method of removing H/sub 2/S and HCN from coke-oven gas, which is already widely used in Western Europe. The ammonia-cycle method comprises H/sub 2/S and HCN absorption from the gas with ammoniacal solution, which is regenerated by distillation. One of the most important stages in the process is the regeneration of a solution containing corrosive components such as ammonia, H/sub 2/S and HCN, among others. Dependable apparatus must be fabricated in materials of the necessary corrosion resistance. When the ammonia-cycle process was first developed in the FRG during the 1950s, difficulties arose from corrosion in the distillation apparatus, which was made from cast iron. To develop the process in the USSR and select materials for the apparatus, VUKhIN issued plans for a pilot ammonia-process unit to remove H/sub 2/S and HCN from coke-oven gas at a throughput of 150 m/sup 3//h. The regeneration equipment, comprising a still, an acidification-regeneration column and a heat exchanger for incoming and stripped solutions, was fabricated in grade AMts aluminum, which is much superior in corrosion resistance and mechanical properties to pure aluminum. Corrosion tests in the equipment took place over two summer periods of 3 months each. The most corrosion resistant material for the conditions are titanium alloys VT1-1 and VT1-0, with corrosion rates measured in thousandths of 1 mm/year, followed by steels 08Kh18N10T and 10Kh17N13M2T at around 0.1 mm/year. Aluminum grades AMgo, AMts and AD-1 corrode at rates of about 0.2 to 0.4 mm/year.

• OSTI ID: 5571497
• Journal Information: Coke Chem. USSR (Engl. Transl.); (United States), Journal Name: Coke Chem. USSR (Engl. Transl.); (United States) Vol. 9; ISSN COKCA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010401* -- Coal & Coal Products-- Carbonization-- (-1987)
010500 -- Coal
Lignite
& Peat-- Products & By-Products
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
AMMONIA
BY-PRODUCTS
CHALCOGENIDES
COAL GAS
COKE OVENS
CORROSION RESISTANCE
CORROSIVE EFFECTS
CYANIDES
DATA
EXPERIMENTAL DATA
FLUIDS
GASES
HYDRIDES
HYDROCYANIC ACID
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
PURIFICATION
REGENERATION
STEELS
SULFIDES
SULFUR COMPOUNDS
TESTING
TITANIUM ALLOYS