Indian high ash coal was used for the preparation of coal water slurry consisting of coarse and fine particles in the proper proportion. Four bimodal samples were prepared with the combination of ...
ABSTRACT. Coal-water slurry (CWS), a mixture of pulverized coal, water, and additives, is a clean liquid coal-based fuel for gasification. Superhydrophobic surface modification using a secondary particle-second liquid system is an effective CWS preparation method.
Semantic Scholar extracted view of "Preparation of coal slurry with 2-propanol." by Yu-Jen Shin et al.
The clarification of recycled water can influence the coal preparation processes such as slurry thickening and dewatering. In this regard, different types of synthetic flocculants and coagulants are used widely to increase the efficiency of the …
By carbon-removal flotation and superfine classification process,ultra-fine fly ash beads with D50 =4.66 μm were selected.After particle ratio optimization with fractal theory model on ultra-fine beads,cement and silica fume,the low density cement slurry of 1.40 g/cm3 was developed.The results showed that ultra-fine beads lightened cement stone,cured either …
The 30% fraction of >53 μm and <75 μm particles and 20% fraction of >75 μm and <106 μm are found to be optimum for high stability, low viscosity and specific …
In order to strengthen the safety management of coal slurry preparation systems, a dynamic risk assessment method was established by using the bow-tie (BT) model and the Structure-variable Dynamic Bayesian Network (SVDBN). First, the BT model was transformed into a static Bayesian network (BN) model of the failure of a coal …
Coal–water slurry (CWS) is a new type of oil-replaceable liquid fuel with low pollution. The cost of CWS preparation will be greatly reduced if low-rank coal is used as the preparation material. In this work, chemical modification was used to prepare the modified sodium lignosulfonate (SL-M) hyper-dispersant, having larger molecular weight …
The present paper is a part of the study done on settling of coal fines by flocculation to enhance the clarification efficiency, such that the process water could be recycled in coal washing circuits. In this study, flocculation performance results of the tests carried out using two polymer flocculants, namely Nalco-83370+ and Magna-1011, …
Coal tar pitch was co-pyrolyzed with FCC slurry. The co-pyrolysis temperature is at 420oC with the mixture of coal tar pitch and FCC slurry mixing ratio of 1:1. The penetration, softening point, ductility and other properties meets the specifications of BZ200. The co-pyrolysis asphalt was analyzed using FTIR, NMR etc. The results …
DOI: 10.1016/j.fuel.2022.123461 Corpus ID: 246685204; Preparation of high concentration coal water slurry with good fluidity based on only modified fine particles under bimodal distribution using the second fluid and the second particle
In the following sections some aspects of the mechanism of coal-water slurry combustion, and of slurry preparation, atomization and burning in industrial combustion systems …
Preparation of CWS Samples: – 55 kg of two-component CWS containing 50 wt.% of coal and 50 wt.% of water was prepared; – the obtained slurry was divided into samples of equal weight; – one CWS sample was left as two-component, PL was added to the other CWS samples (Nos. 1, 2,3, 4, and 5) in quantities of 1-10 wt.%.
The hydrophilic surface and developed pore structure restricted the application of abundant low rank coals (LRC) for the preparation of coal water slurry (CWS) with high concentration.
The Coal Water Slurry (CWS) technology increases the calorific value and changes the phase of coal from solid to liquid. The CWS Plant with a coal capacity of 1.4 t/hour located at Karawang, West ...
In this paper, we focused on the simulation of high-salinity wastewater to determine the effects of Cl - on the performance of coal water slurry. We found a …
The conveying of coal into pressurized gasifiers through slurry preparation and pumping is an attractive alternative to dry feeding based on lock hoppers. Slurry feeding is simpler …
The compatibility of coal with various solvents was evaluated by the simple solvent extraction test. The spectrums of extracts from different coal–solvent mixtures in ethanol are displayed in Fig. 1 and the absorbance of spectrum maximum around 258 nm (Fig. 2 a) served as an indication of a solvent's extraction power or compatibility with …
When low-rank coal was treated first with water pre-adsorption, the slurry performance of CWS was greatly improved and the apparent viscosity was only 1200 mPa · s when the solid concentration was 63%, showing an increase of 3%. Finally, when low-rank Shenhua coal was combined with medium-rank Shandong coal, apparent viscosity was …
Indian high ash coal was used for the preparation of coal water slurry consisting of coarse and fine particles in the proper proportion. Four bimodal samples were prepared with the combination of ...
Abstract The hydrophilic surface and developed pore structure restricted the application of abundant low rank coals (LRC) for the preparation of coal water slurry (CWS) with high concentration. In this work, emulsified asphalt was applied as an effective and low cost modifier to modify coal surface and improve the slurry making …
DOI: 10.1021/EF301986D Corpus ID: 101687097; Improving the Properties of Slurry Fuel Preparation To Recycle Municipal Sewage Sludge by Alkaline Pretreatment @article{Liu2013ImprovingTP, title={Improving the Properties of Slurry Fuel Preparation To Recycle Municipal Sewage Sludge by Alkaline Pretreatment}, author={Jianzhong Liu …
After coal is mined with its associated impurities, it is sent to a coal preparation plant (CPP), in which the coal is separated from its impurities such as sulfur, ash, clay, and rocks. The main purpose of the CPP, or coal washery, is to improve the quality of coal to make it suitable for the market [1].
Using a novel and facile method, we synthesized a family of ultrahigh molecular weight, lignosulfonate-based polymers (ALSs) via alkyl chain coupling polymerization. Gel permeation chromatography (GPC) showed a significant increase in weight-average molecular weights (Mws), from 42 800 Da of ALS1 to 251 000 Da of ALS5—one of the …
ABSTRACT. The Ant Colony Optimization algorithm is one of the leading optimization algorithms for nondeterministic polynomial hard problems. The aim of the present work is to find the maximum power of the agitator and selection of the motor power load for agitation equipment by assuming 80% of the maximum power of the agitator for …
The slurryability, rheological behavior, and static stability of coal pitch wastewater slurry were investigated at different dispersant dosages and slurry …
Before the preparation of coal – water slurry, raw coal was comminuted with a ball mill to obtain coal powder. Then, the coal powder was screened through a 100-mesh
The preparation of waste liquid coal water slurry (WCWS) can aid with environmental protection and resource utilization. In this study, xanthan gum was selected from 11 types of additives because ...
The water added for the preparation of the coal water slurry remained in the particles' surrounding instead of penetrating into it. Li et al. (2018) developed three ionic dispersant using the tannic acid and itaconic acid. The dispersants were named as TIA-1, TIA-2 and TIA-3 respectively. The TIA-1 dispersant due to its 3-D structure is ...
The rheological properties of coal–2-propanol slurries were examined and compared with that of coal–water slurry (CWS). The good compatibility between coal particles and 2-propanol resulted in stable particle suspension in slurry which usually exhibit Newtonian behaviour. ... Distilled water was used in the preparation of CWS. …
