Performance and mechanism of polyacrylamide stabilizers in coal water slurry

Zhang, Yan; Hu, Shunxuan; Yang, Xin; Jiang, Fenghao; Wu, Changning; Li, Junguo; Liu, Ke

doi:10.1016/j.colsurfa.2021.127544

Cited by 23 publications

(17 citation statements)

References 41 publications

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“…For the microexplosive breakup to occur, a CWSP must contain both the combustible and the chemically inert component (water). The main stabilizing additives to composite fuels were soy lecithin [16], rapeseed oil (GOST 31759-2012) [18], diesel fuel [17], and sodium lignosulfonate [26] as one of the promising polymer stabilizers. Coal processing waste (type K filter cake) is also considered a promising solid component of fuel slurries.…”

Section: Methodsmentioning

confidence: 99%

Limiting Conditions for Droplet Fragmentation of Stabilized Suspension Fuels

2022

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The main barrier to the wide use of composite liquid fuels in the energy sector is the significant sedimentation of solid particles during fuel storage and transportation. As a result, the composition of fuel slurries changes quite fast and considerably when yet another portion of fuel is pumped from a storage tank. Stabilizing additives are one of the possible solutions to this problem. The technology of primary and secondary slurry fuel atomization is generally considered promising for obtaining a spray of small fragments (droplets and particles). This way, droplets of liquid components and solid particles can be produced with a size of less than 10 μm. A fuel aerosol with particles and droplets this small burns out rapidly. The most effective secondary droplet atomization technology is based on their microexplosive breakup in combustion chambers by superheating the water in the fuel to exceed its nucleation (boiling) point. As part of this research, we studied the impact of the main stabilizing additives to slurry fuels on droplet breakup behavior: heating time until breakup, breakup delay and duration, and the number, size, and velocities of secondary fragments. Soy lecithin and sodium lignosulfonate were used as stabilizers. The main components of the fuel slurries were water, rapeseed oil, diesel fuel, coal processing waste (filter cake), coking bituminous coal, soy lecithin, and sodium lignosulfonate. Droplets were heated at an ambient gas temperature ranging from 450 to 1050 K until the breakup conditions were achieved. Mathematical expressions were obtained for the relationship between input parameters and the key characteristics of the process. Principal differences and overall patterns of droplet breakup were established for slurries with and without stabilizing additives.

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Section: Methodsmentioning

confidence: 99%

Limiting Conditions for Droplet Fragmentation of Stabilized Suspension Fuels

2022

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“…Slurry pipeline systems are widely utilized around the world as a feasible alternative to large-scale solids transport for conveying minerals such as fly ash, 1 iron ore (IO), coal, 2 , 3 lime stone, 4 copper concentrate, zinc tailings, 5 , 6 and other materials. IO fines play an important role in sintering 7 , 8 and palletization.…”

Section: Introductionmentioning

confidence: 99%

“…Slurry pipeline systems are widely utilized around the world as a feasible alternative to large-scale solids transport for conveying minerals such as fly ash, iron ore (IO), coal, , lime stone, copper concentrate, zinc tailings, , and other materials. IO fines play an important role in sintering , and palletization. , Currently, a large amount of IO fines have been transported from mining sites to the plant through the pipeline, which is both economically and environmentally beneficial.…”

Section: Introductionmentioning

confidence: 99%

Influence of Surfactant for Stabilization and Pipeline Transportation of Iron Ore Water Slurry: A Review

Behari

Das²,

Mohanty

2022

ACS Omega

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Iron ore is generally transported using a traditional method that releases significant amounts of dust into the environment. In contrast, the pipeline transportation of slurry is noticeably a sustainable approach for efficiently transporting iron ore by reducing the environmental pollution. The interparticle interaction of the iron ore particles should be mutually repulsive for steady dispersion. Surfactants and polymers adsorb efficiently at the solid/liquid interface due to their amphiphilic character, rendering the surface hydrophilic or hydrophobic to create a stable dispersion. The present review discusses the interaction of surfactants on the stabilization of solid particles for the ease of pipeline transportation using various types of stabilization mechanisms. In addition to the effect of surfactant alone, its combination with some other parameters such as particle size distribution, temperature, solid concentration, etc. has been discussed. The review also describes the detailed classification of iron ore, surfactant, and characteristic properties of surfactants.

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“…The resulting high viscosity is detrimental to CWS pumping and transportation. 7,8 As a result, the present focus of research is on developing methods for preparing concentrated CWS with increased owability and stability. 9,10 It is widely known that a dispersant, in addition to coal particle size distribution and natural coal characteristics (including mineral composition, coal porosity, and surface properties), is an important factor in improving the rheological properties and stability of CWS.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%