Rheological Characteristics of High Ash Indian Coal with Sodium Dodecyl Sulfate as Additive

IF 0.8 4区 工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY
Akash Pandey, Dulari Hansdah, Satish Kumar
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Abstract

The conveyance of coal in slurry form through pipelines has demonstrated its viability and efficacy, providing economic advantages, reliability and reduced environmental impact. As high-rank coal deposits are steadily depleting, researchers are interested in exploring ways to facilitate utilising low-rank coal to meet the global energy demand. However, the slurry prepared using low-rank coal exhibits high apparent viscosity and poor stability. In the present work, the rheological characteristics of Indian coal with an ash content of more than 50% are improved through the use of the commercial additive sodium dodecyl sulfate. The high ash coal sample’s physical, chemical, and morphological characteristics were assessed. The rheological attributes of the high ash coal slurry were investigated by altering the shear rate, solid loading, and additive concentration. The optimal sodium dodecyl sulfate proportion to obtain slurry with maximum stability and low apparent viscosity was found to be 0.5%. The observed rise in the absolute value of zeta potential from –37.82 to –52.19 mV signifies that suspension stabilization occurs via electrostatic repulsion. A statistical correlation for the prediction of slurry apparent viscosity was developed and proved to be promising and significant.

Abstract Image

Abstract Image

添加了十二烷基硫酸钠的高灰分印度煤的流变特性
摘要 通过管道输送煤浆形式的煤炭已证明其可行性和有效性,具有经济优势、可靠性和减少对环境的影响。随着高阶煤储量的不断枯竭,研究人员希望探索如何促进低阶煤的利用,以满足全球能源需求。然而,使用低阶煤制备的煤浆表观粘度高,稳定性差。在本研究中,通过使用商业添加剂十二烷基硫酸钠,改善了灰分含量超过 50%的印度煤的流变特性。对高灰分煤样的物理、化学和形态特征进行了评估。通过改变剪切速率、固体负荷和添加剂浓度,研究了高灰分煤浆的流变属性。结果发现,要获得具有最大稳定性和较低表观粘度的煤浆,最佳的十二烷基硫酸钠比例为 0.5%。观察到 zeta 电位的绝对值从 -37.82 mV 上升到 -52.19 mV,这表明悬浮液的稳定是通过静电排斥作用实现的。为预测泥浆表观粘度而开发的统计相关性被证明是有前途和有意义的。
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来源期刊
Solid Fuel Chemistry
Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS
CiteScore
1.10
自引率
28.60%
发文量
52
审稿时长
6-12 weeks
期刊介绍: The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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