Rheological properties of two high polymers suspended in an abrasive slurry jet

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 186-193
Author(s):  
Xinyong Wang ◽  
Dapeng Zhou ◽  
Guodong Zhu ◽  
Chuwen Guo
Keyword(s):  
Rheological Properties ◽  
Newtonian Fluid ◽  
Apparent Viscosity ◽  
Methyl Cellulose ◽  
Effect Of Temperature ◽  
Abrasive Particles ◽  
Nonlinear Fitting ◽  
Abrasive Slurry Jet ◽  
Series Of Experiments ◽  
Carboxy Methyl

Abstract With high polymer added into suspension, the use of abrasive slurry jet (ASJ) has significant advantages in energy management. The quality and efficiency of ASJ are affected distinctly by its structure and the flow field feature, both of which depend on the rheological properties of the abrasive slurry. Therefore, this paper carries out a series of experiments to study the rheological properties of abrasive slurry with polyacrylamide (PAM) and carboxy methyl cellulose (CMC) commonly used in ASJ. The paper also explores the effect of temperature and abrasive on the apparent viscosity of the abrasive slurry. Experimental results show that PAM and CMC solutions behave as a pseudoplastic non-Newtonian fluid in the selected concentration range, whose apparent viscosity increases with the concentration. In addition, specific non-Newtonian fluid constitutive equations of the power-law model for PAM and CMC solution were obtained by nonlinear fitting calculation. The apparent viscosity decreases with the growth of temperature because it leads to the increase in spacing between molecules, making the attraction between molecules smaller and smaller. However, the abrasive has no influence on the apparent viscosity of abrasive slurry for these molecular bonds, and their mechanical entanglements are not destroyed by abrasive particles in the suspension.

scholarly journals Studying the Rheological Properties of Non-Newtonian Fluids under the Effect of temperature Using Different Chemical Additives

2020 ◽  
Vol 21 (2) ◽  
pp. 47-56
Author(s):  
Douaa Hussein Ali ◽  
Muhannad A.R. Mohammed
Keyword(s):  
Rheological Properties ◽  
Yield Point ◽  
Apparent Viscosity ◽  
Methyl Cellulose ◽  
Plastic Viscosity ◽  
Newtonian Fluids ◽  
Effect Of Temperature ◽  
Chemical Additives ◽  
Bingham Plastic ◽  
Low Viscosity

   This research studies the rheological properties ( plastic viscosity, yield point and apparent viscosity) of Non-Newtonian fluids under the effect of temperature using different chemical additives, such as (xanthan gum (xc-polymer), carboxyl methyl cellulose ( High and low viscosity ) ,polyacrylamide, polyvinyl alcohol, starch, Quebracho and Chrome Lignosulfonate). The samples were prepared by mixing 22.5g of bentonite with 350 ml of water and adding the additives in four different concentrations (3, 6, 9, 13) g by using Hamilton Beach mixer. The rheological properties of prepared samples were measured by using Fan viscometer model 8-speeds. All the samples were subjected to Bingham plastic model. The temperature range studied is from 50 to 200 °F. The results shows that the rheological properties (plastic viscosity, apparent viscosity and yield point) decreased as temperature increased for all prepared samples of non-Newtonian fluids.

scholarly journals Studying the Rheological Properties of Non-Newtonian Fluids Under the Addition of Different Chemical Additives

2020 ◽  
Vol 23 (1) ◽  
pp. 68-80
Author(s):  
Douaa Hussein Ali ◽  
Muhannad A.R. Mohammed
Keyword(s):  
Sodium Chloride ◽  
Polyvinyl Alcohol ◽  
Rheological Properties ◽  
Apparent Viscosity ◽  
Xanthan Gum ◽  
Methyl Cellulose ◽  
Carboxy Methyl Cellulose ◽  
Chemical Additives ◽  
Low Viscosity ◽  
Carboxy Methyl

This research study the rheological properties ( plastic viscosity, yield point and apparent viscosity) of non-Newtonian fluids under the addition of different chemical additives with different concentrations, such as (xanthan gum (xc-polymer) , carboxy methyl cellulose ( high and low viscosity ) ,polyacrylamide, polyvinyl alcohol, starch, quebracho, chrome lignosulfonate, and sodium chloride (NaCl). Fann viscometer model 800 with 8-speeds was used to measure the rheological properties of these samples, that have already been prepared. All samples were subjected to Bingham plastic model. It was concluded that the plastic viscosity, yield point and apparent viscosity should be increased with increasing the concentrations of (xanthan gum (xc-polymer) , carboxy methyl cellulose ( high and low viscosity ) ,polyacrylamide, polyvinyl alcohol, starch and sodium chloride (NaCl), while the opposite is true for quebracho, chrome lignosulfonate.

scholarly journals A comparative study on the rheological properties of coal water slurries using sodium tripoly-phosphate and carboxy-methyl-cellulose as dispersants

2021 ◽  
Vol 69 (3) ◽  
pp. 100
Author(s):  
M. Ananda Rao ◽  
M. V. Pavan Kumar ◽  
Lenka Srinu
Keyword(s):  
Rheological Properties ◽  
Apparent Viscosity ◽  
Methyl Cellulose ◽  
Flow Behaviour ◽  
Solid Loading ◽  
Carboxy Methyl Cellulose ◽  
Flow Behaviour Index ◽  
Coal Particles ◽  
Behaviour Index ◽  
Carboxy Methyl

The effects of two anionic dispersants (polymeric-carboxy methyl cellulose: CMC and inorganic-sodium tripolyphosphate: STPP) on the rheological properties of coal water slurries (CWS) of varying solid loading were reported and compared. The rheological data was obtained in the shear rate range of 60-160 s<sup>-1</sup> and the data was fitted using power law model. For lower solid concentrations (10% and 20%), shear thickening behaviour was observed while shear thinning nature was seen for the higher solid loadings (30%,40% and 50%) for CWS with both the dispersants. For all slurries, an increase in flow behaviour index values was seen with the increase of dispersant loading. For CWS of 10% and 20% solid loadings, lower values of flow behaviour index was observed with CMC as dispersant. On the other hand, lower values for flow behaviour index was seen with STPP as dispersant for CWS of 30%, 40% and 50% solids loading. Although CMC was found very effective in reducing the apparent viscosity at lower dosages unlike STPP, the apparent viscosity values are quite sensitive to the loading of CMC as dispersant in comparison to STPP. This observed trend may be due to aggressively induced negative charges upon the adsorption of CMC on coal particles at the tested dispersant dosages.

scholarly journals Viscosity sinergism of hydrozypropmethyl and carboxy methyl cellulose

2008 ◽  
Vol 62 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Jaroslav Katona ◽  
Verica Sovilj ◽  
Lidija Petrovic
Keyword(s):  
Shear Rate ◽  
Rheological Properties ◽  
Binary Mixtures ◽  
Methyl Cellulose ◽  
Mass Ratio ◽  
Positive Deviation ◽  
Flow Properties ◽  
Concentration Changes ◽  
Overlap Concentration ◽  
Carboxy Methyl

Rheology modifiers are common constituents of food, cosmetic and pharmaceutic products. Often, by using two or more of them, better control of the product rheological properties can be achieved. In this work, rheological properties of hydroxypropymethyl cellulose (HPMC) and sodium carboxymethyl cellulose (NaCMC) solutions of different concentrations were investigated and compared to the flow properties of 1% HPMC/NaCMC binary mixtures at various HPMC/NaCMC mass ratios. Solutions of HPMC and NaCMC were found to be pseudoplastic, where pseudoplasticity increases with increase in the macromolecules concentration. Changes of the degree of pseudoplasticity, n as well as the coefficient of consistency, K with the concentration are more pronounced in HPMC solutions when compared to the NaCMC ones. This is mostly due to the ability of HPMC molecules to associate with each other at concentrations above critical overlap concentration, c , and greater flexibility of macromolecular chains. Binary mixtures of HPMC/NaCMC were also found to be pseudoplastic. Experimentally obtained viscosities of the mixture were proved to be larger than theoretically expected ones, indicating viscosity synergism as a consequence of HPMC-NaCMC interaction. Maximum in synergy was observed when HPMC/NaCMC mass ratio was 0.4/0.6, no matter of the shear rate applied. On the other hand, it was found that relative positive deviation, RPD decreases when shear rate is increased.

scholarly journals Temperature Effects on Rheological Properties of Fresh Thickened Copper Tailings that Contain Cement

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Yong Wang ◽  
Aixiang Wu ◽  
Zhuen Ruan ◽  
Hongjiang Wang ◽  
Yiming Wang ◽  
...  
Keyword(s):  
Shear Stress ◽  
Pressure Drop ◽  
Rheological Properties ◽  
Yield Stress ◽  
Apparent Viscosity ◽  
Temperature Effects ◽  
Underground Mining ◽  
Effect Of Temperature ◽  
Large Temperature ◽  
Pipeline Transport

Cemented paste backfill (CPB) is an economic and environmental friendly technique applied in underground mining for supporting surrounding rock and replacing the pillar. However, little is known about the temperature effects on CPB in mines having a large temperature fluctuation. The main purpose of this research was to investigate the effect of temperature change on the rheological properties (e.g., shear stress and apparent viscosity) of CPB with copper mine tailings. Specifically, a series of rheological tests were conducted on 6 CPB samples using a Brookfield R/S+ Rheometer under various temperatures (2°C, 10°C, 20°C, 30°C, 40°C, and 60°C). Our results showed that both shear stress and apparent viscosity of these tailing samples increased with temperature rising from 2 to 60°C. Likewise, temperature has a significant impact on the Bingham yield stress of thickened tailings. The yield stress decreased from 122 Pa (2°C) to 112 Pa (20°C) and then increased to 152 Pa (60°C). Moreover, the pipeline transport pressure drop of CPB at various temperatures was calculated, illustrating an obvious effect on the paste pipeline transport. Compared with 20°C, the pressure drop under 2°C and 60°C increased by 11% and 22%, respectively. The results of this study indicate that the temperature plays an essential role in determining rheological properties of CPB and its engineering application in mines particularly with naturally fluctuating temperatures.

scholarly journals Activation and Enhancement of the Performance of Iraqi Ca-Bentonite for Using as Drilling Fluid in Iraqi Oil Fields

2020 ◽  
pp. 2953-2966
Author(s):  
Ahmed Sattar Ibrahim ◽  
Mayssaa Ali Al-Bidry
Keyword(s):  
Rheological Properties ◽  
Drilling Fluid ◽  
Methyl Cellulose ◽  
American Petroleum Institute ◽  
Oil Fields ◽  
Carboxy Methyl Cellulose ◽  
X Ray ◽  
Oil Companies ◽  
Filtration Properties ◽  
Carboxy Methyl

In this study, Iraqi bentonite taken from Trefawi area/ Al-Anbar region province/ Iraq, was activated to enhance its rheological and filtration properties and increase its quality by decreasing the non-clay minerals (impurities), in order to be used in Iraqi oil companies instead of commercial bentonite. Bentonite was characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF) and particle size distribution (PSD) before and after activation to show the effects on its mineral and chemical properties. The rheological properties of bentonite were enhanced by using different weights (0.4, 0.5, 0.6, 0.7 and 0.8 gm) of sodium carbonate (Na₂CO₃), whereas the filtration properties were enhanced by using different weights (0.5, 1, 1.5 gm) of high viscous-carboxy methyl cellulose (CMC-HV) and different weights (0.5, 1, 2 gm) of low viscous-carboxy methyl cellulose (CMC-LV). The results showed that the rheological properties of Iraqi bentonite were enhanced and met the specifications of the American Petroleum Institute (API) when 0.7 gm of Na₂CO₃ was added. The filtration properties were also enhanced and satisfied API specification when 0.5 gm of CMC-HV and 2 gm of CMC-LV were added. Therefore, Iraqi bentonite has the potential to be used as drilling fluid in oil fields.

Steady and dynamic oscillatory shear rheological properties of ketchup–processed cheese mixtures: Effect of temperature and concentration

2011 ◽  
Vol 103 (2) ◽  
pp. 197-210 ◽  
Author(s):  
Mustafa Tahsin Yılmaz ◽  
Safa Karaman ◽  
Hasan Cankurt ◽  
Ahmed Kayacier ◽  
Osman Sagdic
Keyword(s):  
Rheological Properties ◽  
Oscillatory Shear ◽  
Effect Of Temperature ◽  
Processed Cheese

Flow Behaviors of High Acyl Gellan Aqueous Solutions as Affected by Temperature, and Calcium and Gellan Concentrations

2008 ◽  
Vol 4 (5) ◽  
Author(s):  
Yiqun Huang ◽  
Pawan Singh Takhar ◽  
Juming Tang ◽  
Barry G Swanson
Keyword(s):  
Shear Rate ◽  
Aqueous Solutions ◽  
Apparent Viscosity ◽  
Flow Resistance ◽  
Effect Of Temperature ◽  
Temperature Changes ◽  
Influence Of Temperature ◽  
Rheological Behaviors ◽  
Low Concentrations ◽  
Influence Of Temperature On

Rheological behaviors of high acyl (HA) gellan are not well understood partially because of its relatively late commercialization compared to low acyl gellan. The objective of this study was to investigate the effect of temperature (5-30 °C), calcium (0, 1 and 10 mM) and gellan concentrations (0.0044-0.1000% w/v) on the flow behaviors of high acyl gellan aqueous solutions using rheological tests. Gellan solutions with 0 or 1 mM added Ca++ exhibited shear thinning behavior at gellan concentrations above 0.0125%. The influence of temperature on apparent viscosity (shear rate, 100 s-1) of gellan solutions can be described with an Arrhenius relationship. The apparent viscosity of gellan solution at low concentrations was more sensitive to temperature changes. The addition of Ca++ led to a decrease in flow resistance for a dilute gellan solution (<0.0125%), but an increased resistance for a relatively concentrated gellan solution (>0.0125%).

scholarly journals Properties of Gluten Fractions Prepared by Ion-Exchange Chromatography on Carboxymethyl-Cellulose

1963 ◽  
Vol 16 (3) ◽  
pp. 717 ◽  
Author(s):  
JW Lee ◽  
MV Tracey ◽  
DJ Winzor ◽  
CW Wrigley ◽  
H Zentner
Keyword(s):  
Gel Electrophoresis ◽  
Wheat Gluten ◽  
Methyl Cellulose ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Terminal Amino Acid ◽  
Terminal Amino ◽  
Gel Technique ◽  
Reversible Association ◽  
Carboxy Methyl

Seven fractions obtained from wheat gluten by chromatography on carboxy~ methyl-cellulose were studied by ultracentrifugation, gel electrophoresis, chemical, and N-terminal amino acid analysis. On rechromatography, five fractions eluted by sodium chloride behaved as distinct entities. illtracentrifuge experiments indicated that four of these were each undergoing rapid, reversible association. Several N-terminal amino acids were found in each of the fractions which, moreover, could be resolved by the gel technique into a number of electrophoretic bands, some bands being common to those of neighbouring fractions. Total nitrogen values showed the chromatographic samples to be essentially free from non-protein material.

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