Production of a nitrogeneous humic fertilizer by the oxidation-ammoniation of lignite
Two lignite samples were oxidised with HNO/sub 3/ (20% wt) at 75 C and treated afterwards with NH/sub 3/ in a fluidised-bed reactor in a temperature range 100-375 C. The effects of temperature, NH/sub 3/ flow rate, and reaction time on the total N/sub 2/ content of the product are reported. The product contained 7-13% wt of total N/sub 2/ which increased as the ammoniation temperature increased. Soil nitrification measurements of the N/sub 2/-enriched lignites showed that the maximum conversion to nitrates and rate of nitrification are exhibited by the product obtained at the lowest ammoniation temperature, i.e. 100 C. Maximum conversion to nitrates at that temperature was 45%, which compares well with similar products such as ammoniated peat (35%) and ammonium nitrohumates (45%).
- OSTI ID:
- 5833570
- Journal Information:
- Ind. Eng. Chem., Prod. Res. Dev.; (United States), Vol. 23:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FERTILIZERS
PRODUCTION
LIGNITE
CHEMICAL REACTIONS
OXIDATION
AMMONIA
BROWN COAL
CHEMICAL REACTION KINETICS
CHEMICAL REACTORS
FLOW RATE
FLUIDIZED BED
NITRATES
NITRIC ACID
NITROGEN
TEMPERATURE EFFECTS
CARBONACEOUS MATERIALS
COAL
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDRIDES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OXYGEN COMPOUNDS
REACTION KINETICS
010500* - Coal
Lignite
& Peat- Products & By-Products