EXPERIMENTAL-DETERMINATION OF THE EQUIVALENT MASS DIFFUSIVITY FOR A POROUS COAL-ASH PARTICLE

被引：8

作者：

FU, WB

ZHANG, BL

机构：

[1] Department of Engineering Mechanics, Tsinghua University, Beijing

来源：

COMBUSTION AND FLAME | 1995年 / 101卷 / 03期

关键词：

Air - Calculations - Charcoal - Coal ash - Diffusion in solids - Mass transfer - Particles (particulate matter) - Porous materials - Time measurement;

D O I：

10.1016/0010-2180(94)00220-M

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A method is presented for determining the equivalent mass diffusivity, D-e, of air within a porous coal-ash particle by measuring the burnout time of the coal char particle. Because the measurement of the burnout time of a coal char particle is easy and accurate, the data of the equivalent mass diffusivities so obtained should be reliable. The experimental results show the measured value of D-e decreases with increasing ash content, and a relationship between them is derived. Comparisons of calculated burning rates of the large char particles of high ash content with the corresponding experimental results show that the values of D-e obtained by this approach are reasonable.

引用

页码：371 / 377

页数：7