La-Ce-Y-W Cathodes Application for High Temperature Electrostatic Precipitator

Abstract:

La-Y-Ce-W cathode was prepared by powder metallurgy. XRD, OM, SEM and EDS were applied to analyze the microstructure of the material. La, Ce and Y concentrate on the tungstate particles and exist as Rare Earth (RE) tungstate. The average diameter of the particles is about 30µm. The electron emission properties were measured with self-designed electron emitter surveyor. Its effective work function was 2.76eV at 1300°C. The precipitation efficiency of an electrostatic precipitator (ESP) installed with the cathode was investigated in a certain flue gas condition. It was found that it can trap over 95% dust particles with diameter bigger than 1µm. As to dust particles with diameter smaller than 0.1µm, the efficiency is lower than 85%. Increasing collection voltages showed greater positive effects on the precipitation efficiency of smaller particles than that of larger particles.

• Periodical: Advanced Materials Research (Volumes 113-116)
• Pages: 437-441
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.113-116.437
• Online since: June 2010
• Authors: Zhong Zhu Gu, Jian Can Yang, Xiao Li Xi, Zuo-Ren Nie, Jin Jin Xu
• Keywords: Cathode, Electron Emission, High Temperature Electrostatic Precipitation, Tungsten

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