Influence of blending methods on the co-gasification reactivity of petroleum coke and lignite

Zhan, Xiuli; Jia, Jia; Zhou, Zhijie; Wang, Fuchen

doi:10.1016/j.enconman.2010.11.009

Cited by 89 publications

(49 citation statements)

References 13 publications

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“…Petroleum coke-water slurry (PCWS) has good slurryability but inferior stability because of high hydrophobic properties of petroleum coke, which can be overcome by co-slurrying of petroleum coke with lignite. Rich reserves of lignite in China-which account for up to 17 % of all Chinese coal resources-have attracted increasing attention as raw material for gasification (Zhan et al 2011). The presence of significant amounts of inherent moisture and high oxygen content in lignite renders the preparation of lignite-water slurry (LWS) difficult.…”

Section: Introductionmentioning

confidence: 99%

“…As lignite has a low calorific value and petroleum coke has low reactivity due to its low number of pores and alkali species, blending the two may potentially overcome their individual drawbacks by combining their advantages (Wang et al 2004;Wu et al 2009;Zhan et al 2011). Extensive studies have been carried out to determine the factors that affect their rheological properties, such as additive types, temperature, and particle-size distribution (PSD), in order to obtain slurries with high-solid concentration, good fluidity, and sufficient stability against sedimentation of the solid particles (Goudoulas et al 2010;Zhan et al 2010;Gao et al 2010Gao et al , 2012.…”

Section: Introductionmentioning

confidence: 99%

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Improving slurryability, rheology, and stability of slurry fuel from blending petroleum coke with lignite

Liu

et al. 2015

Pet. Sci.

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Petroleum coke and lignite are two important 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 (x 0 ) increases with increasing a. The x 0 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 (x 0 = 57-60 %), good stability (WSR \ 2 %), and superior pseudo-plastic behavior (n & 0.9).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving slurryability, rheology, and stability of slurry fuel from blending petroleum coke with lignite

Liu

et al. 2015

Pet. Sci.

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“…Microcrystalline structure parameters were calculated through Eqs. (2) and (3). Note: here r denotes the speed of the motor (r·min −1 ); Δm denotes the feeding amount in 5 min [g·(5 min) −1 ]; σ denotes standard deviation in population, σ ¼ where d 002 is the spacing between graphitic sheets, λ is the wavelength of the incident X-rays (nm), θ 002 is the peak position, B 002 is the width of (002) peak at half-maximum intensity and L 002 is the average stacking height.…”

Section: Property Tests Of Samplesmentioning

confidence: 99%

“…Zhan et al [2] studied the effects of blending methods on the cogasification of petroleum coke and lignite from experiments performed at atmospheric pressure and 1000°C with a heating rate of 25°C·min − 1 by TGA. Kim et al [4] used a horizontal fixed bed reactor in the char-CO 2 gasification experiments and studied the effects of coal type and particle size on char-CO 2 gasification via gas analysis.…”

Section: Introductionmentioning

confidence: 99%

“…The gasification reaction characteristics of carbonaceous material were widely studied with the usage of thermogravimetric analyzers (TGA), self-made fluidized bed reactors and fixed bed reactors [2][3][4][5]. Zhan et al [2] studied the effects of blending methods on the cogasification of petroleum coke and lignite from experiments performed at atmospheric pressure and 1000°C with a heating rate of 25°C·min − 1 by TGA.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace

Ding

Zhou

Huo

et al. 2015

Chinese Journal of Chemical Engineering

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High‐temperature char gasification of anthracite/petroleum coke: using biomass leachate as cheap‐effective additive

Wei

Ding

Gong

et al. 2020

Asia-Pacific J Chem Eng

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Rice straw leachate (RSL) was employed as cheap‐effective biomass‐based additive for anthracite/petroleum coke (JM/PC) gasification. The influence of RSL on high‐temperature (1,000–1,300°C) char gasification reactivity and kinetics was analyzed by thermogravimetric analysis. The results demonstrate that for PC char, catalytic effect of RSL on its gasification reactivity existed within the whole temperature range and was initially weakened and then enhanced as gasification temperature increased (turning‐point temperature, 1,200°C). For JM char, as gasification temperature increased, the influencing form of RSL on its gasification reactivity was initially presented as the weakened catalytic effect and turned into the reduced inhibition effect within 1,200–1,300°C. These phenomena were mainly attributed to the concentration and activity variations of alkali/alkaline earth metal species derived from RSL during JM/PC char gasification at different temperatures. Kinetics analysis based on conventional models indicates that random pore model (RPM) was more suitable to describe char gasification. Moreover, RSL additive could reduce the activation energy of JM char and PC char gasification by 12.71 and 43.39 kJ·mol−1, respectively, which implied that RSL help to improve char gasification kinetics and exhibited more positive effect on PC char. Kinetics analysis based on free‐model method verified the reliability and accuracy of RPM.

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Influence of blending methods on the co-gasification reactivity of petroleum coke and lignite

Cited by 89 publications

References 13 publications

Improving slurryability, rheology, and stability of slurry fuel from blending petroleum coke with lignite

Improving slurryability, rheology, and stability of slurry fuel from blending petroleum coke with lignite

Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace

High‐temperature char gasification of anthracite/petroleum coke: using biomass leachate as cheap‐effective additive

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