文献类型：期刊文献

英文题名：Effects of sewage sludge on rheological characteristics of coal-water slurry

作者：Li, Weidong[1];Li, Weifeng[1];Liu, Haifeng[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat, Shanghai 200237, Peoples R China

年份：2010

卷号：89

期号：9

起止页码：2505

外文期刊名：FUEL

收录：;EI(收录号：20103213127251);WOS:【SCI-EXPANDED(收录号:WOS:000278391100043)】；

基金：This work is supported by National Natural Science Foundation of China (Grant No. 50776033), New Century Excellent Talents in University (NCET-08-0775), Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT-IRT 0620) and National Key Program of Basic Research in China (CN2004CB217700).

语种：英文

外文关键词：Coal-sludge slurry; Co-gasification; Rheological characteristics; FTIR

摘要：The coal-sludge slurry (CSS) containing coal, sewage sludge and water was prepared to study the effects of sewage sludge on rheological characteristics of the CSS. The yield stress, thixotropy and rheological type of CSS were investigated and compared with those of coal-water slurry (CWS). The results showed that the yield stress of CSS appears at the shear rate range from 0.05 to 0.14 s(-1). For CSS with the naphthalene sulfonate sodium formaldehyde condensate as dispersant and the sludge/coal mass ratio of 10: 100, the yield stress can reach to 22.9 Pa. The thixotropy was quantitatively described by the thixotropy loop area, and sewage sludge can obviously improve the CWS thixotropy. The non-Newtonian behavior of CSS was characterized by a progressive decrease in viscosity with increasing shear rate at the shear rate range from 5 to 180 s(-1). By the analysis of FTIR, SEM and optical microscope, hydrophilic functional groups and colloidal structure of sewage sludge play the key roles on the different rheological characteristics of CSS and CWS. (C) 2010 Elsevier Ltd. All rights reserved.