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Effects of pH on rheological characteristics and stability of petroleum coke water slurry

petroleum Science 2016年第4期13卷 782-787页

作者： Fu-Yan Gao Eric-J.Hu Ningbo Institute of Technology Zhejiang University School of Mechanical Engineering University of Adelaide

In this study, the effects of pH on slurrying properties of petroleum coke water slurry（PCWS） were investigated. The slurrying concentration, rheological characteristics and stability of PCWS were studied with four different types of additives at pH varying from 5 to *** results showed that the slurrying concentration, rheological characteristics and stability of PCWS all increased at first and then decreased with increasing pH from 5 to 11,and a pH of around 9 was found to be the most favorable acid–alkali environment to all these three slurrying properties. It was also indicated that only in a moderate alkaline environment can the additives be active enough to react with particle surfaces sufficiently to obtain good slurrying concentration and form a stable three-dimensional network structure, which can support strong pseudoplastic characteristics and good stability. An acid environment was a very unfavorable factor to the slurrying properties of PCWS.

关键词： petroleum coke petroleum coke water slurry pH slurrying concentration Rheological characteristics Stability

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Effects of the physical and chemical properties of petroleum coke on its slurryability

引用

petroleum Science 2012年第2期9卷 251-256页

作者： Gao Fuyan Liu Jianzhong Wang Chuancheng Zhou Junhu Cen Kefa State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhouZhejiang 310027China Ningbo Institute of Technology Zhejiang UniversityNingboZhejiang 315100China

In this study, the effects of particle size distribution （PSD）, chemical composition and pore structure of petroleum coke on the slurryability of petroleum coke water slurry （PCWS） were investigated. Four petroleum cokes were studied, and they showed completely different slurryability. The solid concentration at fixed viscosity （i.e. apparent viscosity of 1000 mPa）（SCFV） of four PCWSs is different from each other, with the highest value of 70.9%, and lowest of 62.1%. The apparent viscosity of the four PCWSs all increased with an increase of the solid concentration. The results showed that the PSD, inherent moisture content, specific surface area and pore volume of petroleum coke were key factors to affect the slurryability. The slurryability was enhanced with increasing PSD range and particle packing fraction, and with decreasing inherent moisture content, specific surface area and pore volume.

关键词： petroleum coke petroleum coke water slurry slurryability particle size distribution pore structure

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