Calcium cyanamide reduces methane and other trace gases during long-term storage of dairy cattle and fattening pig slurry

Holtkamp, Felix; Clemens, Joachim; Trimborn, Manfred

doi:10.1016/j.wasman.2023.02.018

Cited by 5 publications

(1 citation statement)

References 43 publications

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“…In recent years, the potential value of calcium cyanamide has been exploited and applied in various fields. Calcium cyanamide is also widely used as a precursor for other chemical substances, such as melamine, dicyandiamide, thiourea, unsubstituted and substituted guanidine, and melamine. − At the same time, it can also be used as a raw material for producing pesticides, fertilizers, plastics, and explosives. − In industry, it can be used for the nitridation of steel, the treatment of gold and silver ores, the removal of nitrogen oxides in exhaust gas, the removal of formaldehyde in wastewater, the nitriding of steel, the treatment of gold and silver ores, the removal of nitrogen oxide from waste gas. − It was worth mentioning that the air-stabilized calcium cyanamide-loaded ruthenium (Ru/CaCN 2 ) was an effective and stable catalyst for the synthesis and decomposition of ammonia . Gu et al reported a new synthesis route for the preparation of carbon nitride with a stoichiometric similarity to C 3 N 4 by the reaction of the cyanuric acid chloride with calcium cyanamide at 500–550 °C .…”

Section: Introductionmentioning

confidence: 99%

Preparation and Mechanism Study of Green Cyanamide Calcium

Wang

Meng

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Calcium cyanamide was synthesized by the twice calcination of calcium oxide and urea which was different from the traditional calcium carbide method. Including reaction time, reaction temperature, and reaction molar ratio, the more suitable reactions were explored, which improved the utilization of urea and yield of calcium cyanamide. The phenomenon of visco-wall during the reaction process was alleviated by adding sodium chloride, and this effect was explained at the micro level. The chemical bond and weight change of the main byproducts and intermediate products in the reaction process were characterized systematically. A reaction model between urea and calcium oxide was constructed based on density functional theory (DFT), which complemented the reaction conditions and characterization results. Finally, the reaction mechanism between urea and calcium oxide was proposed.

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