Petroleum Science >2015,??Issue 1:??157-169 DOI: https://doi.org/10.1007/s12182-014-0008-3
Improving slurryability, rheology, and stability of slurry fuel from blending petroleum coke with lignite Open?Access
文章信息
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China;State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China;State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China;State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China;State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China;State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
文章摘要
fossil fuels that have not been widely used in China.
Petroleum coke–lignite slurry (PCLS), a mixture of petroleum
coke, lignite, water, and additives, efficiently utilizes
the two materials. In this study, we investigate the effects of
the proportion (a) of petroleum coke on slurryability, rheological
behavior, stability, and increasing temperature
characteristics of PCLSs. The results show that the fixedviscosity
solid concentration (x0) increases with increasing
a. The x0 of lignite-water slurry (LWS, a = 0) is 46.7 %,
compared to 71.3 % for the petroleum coke–water slurry
(PCWS, a = 100 %), while that of PCLS is in between the
two values. The rheological behavior of PCLS perfectly fits
the power-law model. The PCWS acts as a dilatant fluid. As
a decreases, the slurry behaves first as an approximate
Newtonian fluid, and then turns into a pseudo-plastic fluid
that exhibits shear-thinning behavior. With increasing a, the
rigid sedimentation and water separation ratio (WSR)
increase, indicating a decrease in the stability of PCLS.
When a is 60–70 %, the result is a high-quality slurry fuel
for industrial applications, which has high slurryability
(x0 = 57–60 %), good stability (WSR\2 %), and superior
pseudo-plastic behavior (n & 0.9).
關鍵詞
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Petroleum coke Lignite Coal–water slurry Rheological characteristics Slurry stability