Preparation of Coal Slurry with Alcohol Fermentation Wastewater

Shao, Shuai; Chen, X.; Liu, H.; Wang, F.

doi:10.1080/15567031003735220

Cited by 11 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coal plays a vital role in the global energy source as a substitution of oil . The coal water slurry (CWS), composed of fine coal particles suspended in water, shows its advantages of high combustion efficiency, convenience to handle and transport, and less pollution. , Using industrial wastewater to prepare the CWS could reduce water pollution and alleviate water resource scarcity. − …”

Section: Introductionmentioning

confidence: 99%

“…The complex components in industrial wastewater, such as phenol, heterocyclic compounds, long-chain alkanes, aromatic hydrocarbons, and other organic compounds, , have a complicated influence on the rheology of coal slurries. Therefore, it is necessary to research the influence of every kind of component on the rheology of coal slurries, to evaluate the usability of different wastewaters.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Small Oxygen-Containing Organic Molecules on the Rheology of the Coal Water Slurry

Zhang¹,

Zhao²,

Wang³

et al. 2016

Energy Fuels

View full text Add to dashboard Cite

In order to alleviate the increasingly serious water pollution, industrial wastewater is expected to be treated by coal gasification. In this paper, the usability of wastewater in coal water slurry (CWS) was evaluated. The influences of common components in industrial wastewater, small oxygen-containing organic molecules, on the rheology of CWS were researched. The viscosity and yield stress of CWS were found to increase with the presence of small organic molecules. The microstructures and mechanisms of slurries were characterized using confocal laser scanning microscope (CLSM), FT-IR and contact angle measurement. In CWS, hydrophobic surface of coal particle was found to absorb small oxygen-containing organic molecules and turn hydrophilic. It resulted in thicker hydration layers and less amount of free water. In addition, dispersants were difficult to absorb at the hydrophilic surface, weakening the steric and electrostatic repulsion between particles. Thereby, industrial wastewater (containing small oxygen-containing organic molecules) has negative impacts on CWS preparation. Further steps are expected to be researched to weaken and eliminate these negative impacts, so as to improve the treatment technology of industrial wastewater.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Small Oxygen-Containing Organic Molecules on the Rheology of the Coal Water Slurry

Zhang¹,

Zhao²,

Wang³

et al. 2016

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Most of the slurry samples in the figure presented great pseudoplastic behaviour, indicating that apparent viscosity decreases with the increase of shear rate. The slurry sample with a high SC showed an obvious shear‐thinning pseudoplastic behaviour . However, the apparent viscosity of slurry samples with low SC barely showed changes, or even increased, while the shear rate was increasing.…”

Section: Resultsmentioning

confidence: 99%

“…The slurry sample with a high SC showed an obvious shear-thinning pseudoplastic behaviour. [20] However, the apparent viscosity of slurry samples with low SC barely showed changes, or even increased, while the shear rate was increasing. This type of slurry tends to be a Newtonian or dilatant fluid.…”

Section: Rheological Propertiesmentioning

confidence: 97%

Slurryability and combustion characteristics of coal‐coking wastewater‐slurry

et al. 2019

View full text Add to dashboard Cite

The slurryability, rheological properties, stability, and combustion characteristics of coal water slurry (CWS), made from coking wastewater (CW), deionized water, and Shenhua coal were experimentally studied. Results showed that the solid concentration of coal‐coking wastewater‐slurry (CCWS) could be higher than 60.5 %, which is 0.5–1.5 % lower than that of coal water slurry (CWS). However, the pseudoplastic behaviour of CCWS was greatly evident. The dispersion effects of NNO and NDF were excellent. The stability of CCWS is better than CWS. Moreover, CCWS had lower ignition temperature and burnout temperature, higher combustion characteristic parameters, such as combustion characteristic index S and ignition stability index Rw, and better performance in combustion than CWS. The application of CW for the production of coal water slurry demonstrated the resource utilization of wastewater and improved the combustion characteristic.

show abstract

“…11 The adaptability of raw materials is gradually enhanced with the development of CWS gasification technology and the evolution of industrial operating devices. In recent years, researchers have used CWS technology to dispose of solid and liquid wastes (e.g., sewage sludge, 12 bioferment residue, 13 wastewater, 14 and engine oil 15 ). In this manner, the calorific value of wastes is fully utilized and disposal cost is reduced, which are beneficial both economically and environmentally.…”

Section: Introductionmentioning

confidence: 99%

Slurrying Property and Mechanism of Coal–Coal Gasification Wastewater–Slurry

et al. 2018

View full text Add to dashboard Cite

The co-slurrying technology of coal and organic wastewater, which achieves the simultaneous disposal and utilization of wastewater, has attracted extensive attention in recent years. The emission of coal gasification wastewater causes serious environmental hazards, because of its large amount, high organic content, and high toxicity. In the present study, two types of wastewater, namely, gasifier wastewater (GW) and wastewater from a secondary sedimentation tank (SW), were used to prepare coal water slurry (CWS), which was labeled as coal−GW−slurry (CGS) and coal−SW−slurry (CSS), respectively, with coal−deionized water−slurry (CDS) as a reference. The surface property of coal and the dispersing mechanism were characterized using zeta potential and contact angle analyses. Results showed that the fixed viscosity loading decreased with the addition of the two types of wastewater, and the decrease was more considerable with GW. All the slurries exhibited pseudoplastic behavior and thixotropy, with the following order: CGS > CSS > CDS. Wastewater, particularly GW, strengthened the stability of CWS. The influences of ammonium and volatile phenols on slurry viscosity were also investigated. The effect of ammonium was related to the pH value of the solution. The effect of volatile phenols on the range of wastewater organic content was limited. The stability of CWS was obtained by combining the result of ammonium with organic matter. Ammonium affected the surface charge of coal particles and changed the electrostatic repulsion between coal particles. The amphiphilic organic molecules enhanced the hydrophilicity of coal, which weakened the hydrophobic interaction between particles and thickened the hydration layer. Consequently, the agglomeration of coal particles was weakened.

show abstract

Preparation of Coal Slurry with Alcohol Fermentation Wastewater

Cited by 11 publications

References 14 publications

Influence of Small Oxygen-Containing Organic Molecules on the Rheology of the Coal Water Slurry

Influence of Small Oxygen-Containing Organic Molecules on the Rheology of the Coal Water Slurry

Slurryability and combustion characteristics of coal‐coking wastewater‐slurry

Slurrying Property and Mechanism of Coal–Coal Gasification Wastewater–Slurry

Contact Info

Product

Resources

About