The synthesis of HCN in a solid electrolyte cell
1991; Elsevier BV; Volume: 132; Issue: 1 Linguagem: Inglês
10.1016/0021-9517(91)90262-3
ISSN1090-2694
Autores Tópico(s)Catalytic Processes in Materials Science
ResumoThe synthesis of HCN from CH4, NH3 and air was achieved with co-generation of electrical energy in an yttria-stabilized zirconia cell with Pt electrodes operating at 750–1000°C. In addition to HCN the exit stream contained N2, CO, H2O and occasionally CO2 and N2O. A kinetic model was prepared considering 14 reactions occuring simultaneously at the anode. The effects of temperature, O-- flux, inlet gas composition, and inlet gas velocity on the HCN yield and on the overall exothermicity of the system were examined. It was found that the cell can operate adiabatically if the CH4/NH3 feed ratio is higher than 1.25. Two different cell designs were examined, one in which the anode is inside the YSZ tube, and one in which air flows inside the tube and the fuel flows outside perpendicular to the direction of air flow. The latter design exhibits certain additional advantages over the traditional tubular cell design.
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