Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 27 for “"Rotating disc"”.
-
Modelling calcite dissolution in a rotating disc reaction vessel
The carbonate system is ubiquitous in nature, playing a role in many natural and industrial processes. For calcite dissolution, the kinetics and mass transport of the dissolved species reflect both the chemistry of the bulk, and the conditions at the dissolving interface. We formulate the …
-
Stresses in a Rotating Disc Due to Evenly Spaced Blade.
… the solutions for the stress distribution in a disc of uniform thickness when evenly spaced, radially directed loads, uniformly distributed over the thickness of the disc, are applied; and the stress distribution in the disc when evenly spaced in-plane moments are applied to the disc.
-
Liquid-liquid extraction in a pilot scale rotating disc contactor
… process in a 450 mm diameter, 4.30 m high Rotating Disc Contactor (R.D.C.) has been undertaken. The literature relating to this type of extractor and the relevant phenomena, such as droplet break-up and coalescence, drop mass transfer and axial mixing has been revjewed. Experiments were …
-
Continuous solvent extraction of a Venezuelan reduced crude on a rotating disc contactor
Includes bibliographical references.
-
The use of laboratory erosion tests for the prediction of wear in pneumatic conveyor bends
… conditions. The first of these was a laboratory 'rotating disc accelerator' erosion tester, and the second an industrially scaled pneumatic conveying test facility. Both test facilities yielded results that followed previously reported trends but also illustrated some trends that have been …
-
An experimental and theoretical study of the flow about spheres and discs rotating slowly in viscoelastic fluids
An analysis of the flow about a sphere rotating slowly in a Rivlin-Ericksen fluid contained in a stationary outer concentric sphere is presented. An application of the conformal mapping technique is proposed. The technique is used to obtain the radial and axial velocity components for the flow …
-
ΜΕΛΕΤΗ ΤΗΣ ΑΥΘΟΡΜΗΤΗΣ ΗΛΕΚΤΡΟΧΗΜΙΚΗΣ ΑΠΟΘΕΣΗΣ ΙΟΝΤΩΝ ΜΟΛΥΒΔΟΥ ΑΠΟ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ ΣΕ ΣΙΔΗΡΟ ΚΑΙ Η ΣΗΜΑΣΙΑ ΤΗΣ ΣΤΗΝ ΕΠΕΞΕΡΓΑΣΙΑ ΥΓΡΩΝ Β...
… WITH THREE DIFFERENTPRECIPITANT GEOMETRIES (IRON ROTATING DISC, IRON POWDER IN A STIRRED VESSEL AND AN IRON-SPHERE PACKED COLUMN). VARIOUS EXPERIMENTAL PARAMETERS WHICH INFLUENCE LEAD-ION REMOVAL WERE EXAMINED BOTH BY BATCH AND CONTINUOUS EXPERIMENTS. OPTIMUM CONDITIONS FOR LEAD REMOVAL AND …
-
Low platinum loading electrospun electrodes for proton exchange membrane fuel cells
… voltage losses. Cyclic voltammetry and rotating disc electrode experiments were performed in order to evaluate the influence of platinum loading and particle size on the electrochemical active area and oxygen reduction performance of the sputtered platinum. Active area per weight …
-
A low-cost defocus blur module for video rate quantified 3D imaging
… or resolution. By using an offset aperture on a rotating disc, the 3D Monocular Imaging System provides a fast, portable, accurate, and cheap method of 3D surface imaging by relating the differences in images generated by the aperture at different positions to the depth of the features on the …
-
The Modification of Solvents for Liquid-Liquid Extraction Processes
… The mass transfer was studied on a pilot scale Rotating Disc Contactor. The hydrodynamic behaviour of the R.D.C. was reviewed and established. The evaluated overall mass transfer coefficients suggested that the acid generally increased the values.
-
The design of a high pressure solvent extraction process using liquid ammonia as solvent
… a Scm. diameter by 12Scm. high, 50 stage Rotating Disc Contactor with 2 external settlers. Provision was made for operation with, or without, reflux at a pressure of 10 bar and ambient temperature. The solvent recovery unit consisted of an evaporator, compressor and condenser in a …
-
Liquid-liquid Extraction Studies in a Pilot Scale Agitated Column
… and mass transfer characteristics of the Rotating Disc Contactor. The literature relating to this extractor and relevant phenomena, e.g. droplet break-up and coalescence, single drop mass transfer, axial mixing and phase inversion/flooding, has been reviewed. A 450 mm diameter, fourteen …
-
The Kinetics of Particulate Substrate Utilization by Bacterial Films
… are the focus of experimentation, modeling, and discussion. The goal of this research project is to study the kinetics of PCOD removal from wastewaters by bacterial films, or biofilms. To achieve this objective, a bench-scale rotating disc biofilm reactor (RDBR) was operated using methanol …
-
Rapid screening of PEM FC cathode catalysts
… single-electrode methods such as half cell, rotating disc electrode (RDE) or fuel cell. The results from the two high-throughput methods are compared to those of the single channel systems. The mass and specific activities towards reduction of oxygen were studied using a series of Pt/C and …
-
Study of the Performance of a Large Mechanically-Agitated Extraction Column
… characteristics of a 0.45m diameter, 4.3m high Rotating Disc Contactor. The system used was Clairsol-350 (dispersed)-acetone-de-ionised water. Hydrodynamics were studied with mutually-saturated phases and in the presence of mass transfer. Drop size distributions under all conditions were best …
-
CuAg bimetallic nanoparticles for the electrochemical reduction of carbon dioxide
… reactor with a gas diffusion electrode, and a rotating disc electrode reactor. It was found that catalysts synthesised in the absence of HDA had a phase-separated atomic arrangement, forming islands of Cu and Ag. On the other hand, synthesis conducted in the presence of HDA culminated in a CuAg …
-
Correlative ex-situ analysis and operando ellipsometric investigation during oxygen evolution reaction of mesoporous iridium oxide model catalysts
… analytical techniques. For example, standard rotating disc electrode experiments are performed to study the impact of the catalysts structure on electrochemical processes, but do not provide any information about changing material properties during the experiment. Ellipsometry is a very …
-
Controlled electrodeposition of metal nanocentres for catalysis
… respectively. Various substrates such as microdisc, microband and microwire electrodes were used for the study of controlled electrodeposition. Their smaller surface area provides a better tool for the study of nucleation and growth of nuclei. The effect of mass transport was studied with …
-
Constraining the Quenching Mechanisms in Galaxies
… for suppressing star formation in the outer disc, but it is not possible to rank their effect towards the strongly quenched galaxy centre, where SFE is only constrained to an upper limit. I also show that the significant reduction in gas fraction in the central regions is driven by an …
Page 1 of 2