Modeling and Measurement of the Dissolution Rate of Solid Particles in Aqueous Suspensions– Part II: Experimental Results and Validation

2003 ◽  
Vol 26 (12) ◽  
pp. 1225-1229 ◽  
Author(s):  
T. Allers ◽  
M. Luckas ◽  
K.G. Schmidt
Keyword(s):  
Dissolution Rate ◽  
Solid Particles ◽  
Experimental Results ◽  
Aqueous Suspensions

scholarly journals Application of Bionic Technologies on the Fracturing Plug

Biomimetics ◽  
2019 ◽  
Vol 4 (4) ◽  
pp. 78
Author(s):  
Lin Chen ◽  
Ran Wei ◽  
Songbo Wei ◽  
Xinzhong Wang
Keyword(s):  
Hydraulic Fracturing ◽  
Dissolution Rate ◽  
Experimental Results ◽  
Hydrophobic Properties ◽  
Multi Stage ◽  
Bionic Surface ◽  
Zonal Isolation ◽  
Oil Gas

The dissolvable bridge plug is one of the most important tools for multi-stage hydraulic fracturing in the field of oil/gas development. The plug provides zonal isolation to realize staged stimulation and, after fracturing, the plug is fully dissolved in produced liquids. A bionic surface was introduced to improve the performance of the plug. Surface dimples in the micron dimension were prepared on the dissolvable materials of the plug. The experimental results showed that the surface dimples changed the hydrophilic and hydrophobic properties of the dissolvable materials. The dissolution rate has a great relation with the parameters of the dimples and can be controlled by choosing the dimples’ parameters to some degree.

Solids Distribution in Sediment-Laden Open-Channel Flow: Experiment and Prediction

2020 ◽  
Author(s):  
Václav Matoušek ◽  
Jan Krupička ◽  
Tomáš Picek ◽  
Štěpán Zrostlik
Keyword(s):  
Channel Flow ◽  
Open Channel ◽  
Transport Model ◽  
Plane Surface ◽  
Open Channel Flow ◽  
Solid Particles ◽  
Experimental Results ◽  
Transport Layer ◽  
Experimental Investigations ◽  
Solids Concentration

Abstract Solid-liquid flow is studied in an open channel with a mobile bed at the condition of intense transport of solids. It is flow of high-concentrated mixture of coarse sediment and water over a plane surface of the bed eroded due to high bed shear. In the flow, solid particles are non-uniformly distributed across the flow depth. The flow develops a transport layer, adjacent to the the top of the bed, in which transported particles interact with each other. Results are presented of experimental investigations of the sediment-laden open-channel flow in a recirculating titling flume. The experiments included measurements (using ultrasonic techniques) of the distribution of solids velocity across the transport layer. The related distribution of solids concentration was deduced from the measured distribution of velocity and from other measured flow quantities. Since recently, a direct measurement of the solids distribution across the transport layer has been added to the experiments using a measuring technique svideo camera and a laser sheet. This work discusses results of combined measurements of the distributions of solids concentration and velocity in steady uniform turbulent flow for two lightweight solids fractions and various flow conditions (a broad range of the bed Shields parameter, discharge of solids, discharge of mixture, and the longitudinal slope of the bed). Furthermore, the camera-based measuring method and the deducing method for a determination of solids distribution are discussed and their results compared to show a good agreement in a majority of the test runs. The experimental results are compared with predictions of a recently developed bed-load transport model. Among other outputs, the model predicts the position of the top of the transport layer and the local velocity of sediment particles at this position. The presented model predictions agree well with experimental results based on the measured distibutions.

STUDY ON ELECTROKINETIC PARAMETERS OF COMPOSITE COAGULANTS-FLOCCULANTS

2019 ◽  
Vol 62 (11) ◽  
pp. 46-56
Author(s):  
Lei Sun ◽  
Aleksandr V. Nevsky ◽  
Hui Zhao ◽  
Heng Zhong ◽  
Dongsheng Xia
Keyword(s):  
Suspended Particles ◽  
Solid Particles ◽  
Experimental Results ◽  
Organic Polymer ◽  
Main Function ◽  
Organic Polymers ◽  
Charge Neutrality ◽  
Polyaluminum Chloride ◽  
Electrical Layer ◽  
Polyaluminium Chloride

In this work the electrokinetic parameters of composite coagulants-flocculants based on combination of polyaluminum chloride (aluminum oxychloride) and organic polymers were studied systematically. The experimental results, obtained by the streaming current and electrophoresis methods, witness that the combination of polyaluminum chloride and cationic organic polymer can effectively enhance the charge neutrality capacity. The results obtained directly indicate that after the combination of polyaluminum chloride and cationic organic polymer, the positive charge of suspended particles obviously enhances, and the ability of double electrical layer on solid surface with negative charge improves. The most important factor is that the charge neutrality capacity of composite coagulant is stronger, thus, in comparison with polyaluminum chloride efficiency, the efficiency of composite reagent is higher. Moreover, due to the existence of long molecular chain, adding cationic organic polymer into polyaluminum chloride can enhance the bridging coagulation between its particulate matters. The experimental results indicate that if to combine polyaluminum chloride with natural cationic organic polymer - chitin and industrial cationic organic polymer product C109P, its electric charge can be largely enhanced This fact undoubtedly deserves attention when developing compositions of coagulants-flocculants to improve their ability to charge neutrality in the processes of coagulation and agglomeration of suspended particles. When executing experiment on the use of anionic organic polymers, the regulation of the coagulation-flocculation theory that the main function of an anionic organic polymer in a composite reagent is the function of a bridge between solid particles was taken as a basis. At the same time, an effective influence on this property of the system can hardly lead to a decrease in the ability to neutralize the charge of polyaluminium chloride. Experimental data relating to the study of the composition reagent containing polyaluminium chloride and industrial anionic organic polymer products AH200P and AN910SH, confirm the fact that this combination does not reduce the ability to neutralize the charge.

Emulsifying Effect of Solid Particles on Epoxy Resin E-44

2011 ◽  
Vol 233-235 ◽  
pp. 337-343
Author(s):  
Li Xin Zhou ◽  
Jun Xia Wang ◽  
Chu Ping Ye ◽  
Ling Lan Li ◽  
Chang Li Lu
Keyword(s):  
Calcium Carbonate ◽  
Epoxy Resin ◽  
Disperse Phase ◽  
Solid Particles ◽  
Experimental Results ◽  
Multiple Emulsion ◽  
Aqueous Emulsion ◽  
Aerosil Surface ◽  
Result Show ◽  
Surface Modified

Emulsify epoxy resin E-44 with heavy calcium carbonate, light calcium carbonate, aerosil, surface-modified aerosil and bentonite BP-187. The experimental results show that neither heavy calcium carbonate nor light calcium carbonate has emulsifying effect. O/W type emulsion can not be obtained with aerosil and bentonite BP-187. Surfactant-modified aerosilCTAB-SiO2and DTAB-SiO2do have emulsifying effect, and they can transform into more stable O/W type emulsion. The synergy between BP-17, EP-1 and CTAB-SiO2is obvious. Hydrophilic emulsifier EP-1 could be replaced by CTAB-SiO2or BP-187 completely or partly to prepare stable O/W emulsion. The TEM result show that the disperse phase of the emulsion produced by CTAB-SiO2and the compound emulsifier of CTAB-SiO2and BP-187 is irregular floc, and the disperse phase of the aqueous emulsion produced by the compound emulsifier of CTAB-SiO2and EP-1 is regular globular or ellipsoidal multiple emulsion.

Influence of Dispersants on Dispersion Stability of TiO2 Suspensions

2011 ◽  
Vol 356-360 ◽  
pp. 476-479 ◽  
Author(s):  
Yu Mou ◽  
Kun Miao Lü ◽  
Dong Mei Gao
Keyword(s):  
Aqueous Solution ◽  
Experimental Results ◽  
Dispersion Stability ◽  
Sodium Hexametaphosphate ◽  
Aqueous Suspensions ◽  
The Stability

TiO2nanoparticles are prone to aggregate in aqueous solution, which limits its extensive application. Several researches have been carried on the stability of TiO2suspensions. In this study, four common dispersants including ethanol, tetrahydrofuran (THF), polyvinylpyrrolidone (PVP), and sodium hexametaphosphate (SHMP) have been chosen to detect their effects on stability of TiO2aqueous suspensions. The experimental results showed that THF and SHMP were efficient dispersants for TiO2nanoparticles in aqueous solution.

Sign in / Sign up

Export Citation Format

Share Document