文献类型：期刊文献

英文题名：Measurement and Simulation of Flow Properties of Coal Ash Slag in Coal Gasification

作者：Song, Wenjia[1];Sun, Yimin[1];Wu, Yongqiang[1];Zhu, Zibin[1];Koyama, Shuntarou[2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Japan Coal Energy Ctr, Tokyo 1080073, Japan

年份：2011

卷号：57

期号：3

起止页码：801

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20110613656782);WOS:【SCI-EXPANDED(收录号:WOS:000287104700021)】；

语种：英文

外文关键词：flow properties; coal ash slag; factsage; gasification

摘要：The viscosities of 45 coal ash slag samples at high temperature have been measured under different temperatures and shear rates. The computer thermodynamic software package FactSage has been used to predict liquidus temperatures, volume fractions of crystallized solid particles (phi), and the compositions of remaining liquid phase for 45 coal ash slag samples. The flow properties of completely liquid and partly crystallized coal ash slag samples have been predicted by three viscosity models. The Urbain formalism has been modified to describe the viscosities of fully liquid slag and homogeneous remaining liquid phase in coal ash slag samples. The modified Einstein equation and Einstein-Roscoe equation have been used to describe the viscosities of heterogeneous coal ash slag samples of phi < 10.00 vol % and phi >= 10.00 vol %, respectively. These three models provided a good description of the experimental data of fully liquid and heterogeneous coal ash slag samples. The new models also predicted flow properties of mixtures of coal ash slags with CaO, Fe2O3, MgO, SiO2, and Al2O3. (C) 2010 American Institute of Chemical Engineers AIChE J, 57: 801-818, 2011