CHARGE LOSS FROM HEATED PARTICLES LEVITATED IN AN ELECTRODYNAMIC BALANCE

被引：4

作者：

DUDEK, DR ^{[1
]}

WRIGHT, DA ^{[1
]}

LONGWELL, JP ^{[1
]}

SAROFIM, AF ^{[1
]}

YEHESKEL, J ^{[1
]}

机构：

[1] NUCL RES CTR NEGEV, IL-84190 BEER SHEVA, ISRAEL

来源：

COMBUSTION SCIENCE AND TECHNOLOGY | 1990年 / 73卷 / 1-3期

关键词：

D O I：

10.1080/00102209008951662

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Charge loss due to particle heating has experimentally been found to represent the most serious limitation in studying single particle, high temperature, gas-solid reactions in the electrodynamic balance (EDB). Experimentally, charge loss appears to be a function of particle work function, particle temperature, electric field strength, and adsorbed species contamination. Particle charge loss for the pulsed laser heating experiments is approximately the same for positively and negatively charged spherocarb particles. Although some residual questions remain, thermionic emission appears to be the most probable mechanism for charge loss. The Richardson-Dushman equation successfully predicts rapid charge loss from Spherocarb particles at 1200–1300 K and from potassium catalyzed Spherocarb at 750 K. A modified Richardson-Dushman equation has been proposed for the inclusion of the effect of electric field, adsorbed species, and surface irregularities on charge loss rate in order to correlate the experimental results. © 1990, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：447 / 461

页数：15

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