Imperial College London
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ProfessorGeoffKelsall

Faculty of Engineering, Department of Chemical Engineering

Emeritus Professor of Electrochemical Engineering
 
 
 
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Contact

 

g.kelsall Website

 
 
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Location

 

RODH 302Roderic Hill BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

248 results found

Droushiotis N, Othman MHD, Doraswami U, Wu Z, Kelsall G, Li Ket al., 2009, Novel co-extruded electrolyte-anode hollow fibres for solid oxide fuel cells, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 11, Pages: 1799-1802, ISSN: 1388-2481

Journal article

Dal Grande F, Thursfield A, Kanawka K, Droushiotis N, Doraswami U, Li K, Kelsall G, Metcalfe ISet al., 2009, Microstructure and performance of novel Ni anode for hollow fibre solid oxide fuel cells (vol 180, pg 800, 2009), SOLID STATE IONICS, Vol: 180, Pages: 1231-1231, ISSN: 0167-2738

Journal article

Droushiotis N, Doraswami U, Kanawka K, Kelsall GH, Li Ket al., 2009, Characterization of NiO-yttria stabilised zirconia (YSZ) hollow fibres for use as SOFC anodes, SOLID STATE IONICS, Vol: 180, Pages: 1091-1099, ISSN: 0167-2738

Journal article

Dal Grande F, Thursfield A, Kanawka K, Droushiotis N, Doraswami U, Li K, Kelsall G, Metcalfe ISet al., 2009, Microstructure and performance of novel Ni anode for hollow fibre solid oxide fuel cells, Electroceramics XI Conference, Publisher: ELSEVIER, Pages: 800-804, ISSN: 0167-2738

Conference paper

Doraswami U, Kelsall GH, 2009, Modelling of carbon-fuelled micro-tubular hollow fibre SOFCs with molten metal anodes, Pages: 165-166

High temperature direct carbon fuel cells (DCFCs) for conversion of solid carbonaceous fuel(s) in a fuel cell are being researched due to their potentially high energy efficiencies. DCFCs that utilize a molten metal anode involve consumption of carbonaceous fuel by dissolved oxygen within the melt, which functions as an anode in an otherwise conventional SOFC. This concept has been developed by companies such as CellTech Power LLC (www.celltechpower.com) with cells producing ca. 120 mW cm-2 with 40% fuel efficiency over 100 hours of operation [1]. 3-D models have been developed to predict the behavior of a micro-tubular hollow fibre SOFC (ca. 1 mm ID) with a molten metal (Sn) anode. Results will be reported of model predictions of fuel cell performance and of spatial distributions of dissolved oxygen within the molten Sn anode, enabling conditions to be defined likely to lead, undesirably, to SnO2 formation.

Conference paper

Droushiotis N, Doraswami U, Othman MHD, Li K, Kelsall GHet al., 2009, Co-Extrusion/Phase Inversion/Co-Sintering for Fabrication of Hollow Fiber Solid Oxide Fuel Cells, SOLID OXIDE FUEL CELLS 11 (SOFC-XI), Vol: 25, Pages: 665-672, ISSN: 1938-5862

Journal article

Doraswami U, Droushiotis N, Kelsall GH, 2009, Modeling Potential, Current and Gas Velocity Distributions in Micro-Tubular Hollow Fiber SOFC Stacks, SOLID OXIDE FUEL CELLS 11 (SOFC-XI), Vol: 25, Pages: 1241-1251, ISSN: 1938-5862

Journal article

Dawson R J, Kelsall G H, 2007, Recovery of platinum group metals from secondary materials. I. Palladiumdissolution in iodide solutions, J.Appl.Electrochem., Vol: 37, Pages: 3-14, ISSN: 0021-891X

Journal article

Cheng C-Y, Kelsall GH, 2007, Models of hypochlorite production in electrochemical reactors with plate and porous anodes, J.Appl.Electrochem., Vol: 37, Pages: 1203-1217

Pseudo two-dimensional finite element models were developed to predict the hypochlorite (chloric(I)) (HOCl + OCl-) production by electrolysis of near-neutral aqueous sodium chloride solution, in reactors with a) an anode and cathode in the form of plates, and b) a lead dioxide-coated graphite felt anode and titanium plate cathode. The model was used to investigate the feasibility of using a porous anode to achieve high single pass conversions in oxidising chloride ions. For the model reactor with planar anode, the effects of diffusion, migration and convection on the mass transport of the reacting species were considered, whereas with the porous anode, a supporting electrolyte (Na2SO4) was notionally present to eliminate the migrational contribution to reactant transport. For an electrolyte flow rate of 10-6 m3 s-1 (Re = 10 for plate electrodes, Re,porous= 0.76 for porous anode) , a cell voltage of 2.8 V and an inlet NaCl of 100 mol m-3, the single-pass conversion of Cl- was predicted to increase from 0.4 for the reactor with a planar anode to 0.8 for the reactor with a porous anode. For the same operating conditions, the overall current efficiency was also predicted to increase from 0.75 to 0.8 by replacing the plate with the porous anode.

Journal article

Pilone D, Kelsall GH, 2006, Prediction and measurement of multi-metal electrodeposition rates and efficiencies in aqueous acidic chloride media, ELECTROCHIMICA ACTA, Vol: 51, Pages: 3802-3808, ISSN: 0013-4686

Journal article

Cheng CY, Diaz MA, Kelsall GH, Robson ACet al., 2006, Gold electrowinning from acidic aqueous chloride in a packed bed electrode, ECS Transactions, Vol: 2, Pages: 317-328, ISSN: 1938-5862

Concentrations < 0.5 mol m-3 (<102 g m -3) of AuCl4- and AuCl2- ions in 1 kmol HCl m-3 aqueous electrolyte were reduced to elemental gold in a packed bed cathode of 2-3 mm graphite particles, in an electrochemical reactor incorporating a cation-permeable membrane and operated in batch recycle mode. Depletion to concentrations < 5×10-3 mol m -3 (< 1 g m-3) appeared to be mass transport controlled at an applied potential of 0.53 V (SHE) and occurred with < 4 F (mol Au)-1 and specific electrical energy consumptions of ca. 400 kW h (tonne Au)-1. However, atomic absorption and UV spectrophotometry established that, as the ([AuCl4-] + [AuCl 2-) concentration decayed, the [AuCl2-]: [AuCl4-] molar ratio changed. A (multi-step) mechanism for reduction of AuCl4- ions is proposed, to explain this behaviour, in terms of changing overpotentials for AuCl4- and AuCl2- reduction as total dissolved gold concentrations decreased. Copyright The Electrochemical Society.

Journal article

Cheng CY, Kelsall GH, Robson AC, 2006, Model predictions of metal leaching rates from Waste Electrical and Electronic Equipment (WEEE) in chlorine-containing acidic aqueous chloride, ECS Transactions, Vol: 2, Pages: 231-242, ISSN: 1938-5862

Models were developed for a packed bed leach reactor for dissolving metals (Ag, Au, Cu, Pb, Pd, Sn) from waste electrical and electronic equipment (WEEE) by dissolved chlorine in acidic aqueous chloride solutions, the dissolution kinetics of non-precious metals being controlled by the mass transport of chlorine. Three particles shapes of shredded WEEE (sphere, cylinder, triclinic prism) were considered and the time evolution of metal surface area was computed using finite element software. The effects were calculated of particle shape, liquid flow rate, operational mode (single-pass and part batch recycle) and reaction rate coefficients for precious metals, on metal conversion and efflux chlorine concentration. For Re = 2.4, overall metal conversions of > 0.9 were predicted to be achieved in 8 hours with single-pass mode, 'breakthrough' occurring for metal conversions > 0.6, and in 10 hours with part batch recycle mode. Copyright The Electrochemical Society.

Journal article

Pilone D, Kelsall GH, 2006, Model of multiple metal electrodeposition in porous electrodes, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 153, Pages: D85-D90, ISSN: 0013-4651

Journal article

Cheng CY, Kelsall GH, Pilone D, 2005, Modelling potentials, concentrations and current densities in porous electrodes for metal recovery from dilute aqueous effluents, JOURNAL OF APPLIED ELECTROCHEMISTRY, Vol: 35, Pages: 1191-1202, ISSN: 0021-891X

Journal article

Szpyrkowicz L, Cherbanski R, Kelsall GH, 2005, Hydrodynamic effects on the performance of an electrochemical reactor for destruction of disperse dyes, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, Vol: 44, Pages: 2058-2068, ISSN: 0888-5885

Journal article

Szpyrkowicz L, Kelsall GH, Souto RM, Ricci F, Kaul SNet al., 2005, Hydrodynamic effects on the performance of an electrochemical reactor for destruction of copper cyanide. Part 2 - reactor kinetics and current efficiencies, CHEMICAL ENGINEERING SCIENCE, Vol: 60, Pages: 535-543, ISSN: 0009-2509

Journal article

Szpyrkowicz L, Kelsall GH, Souto RM, Ricci F, Kaul SNet al., 2005, Hydrodynamic effects on the performance of an electrochemical reactor for destruction of copper cyanide - Part 1: in situ formation of the electrocatalytic film, CHEMICAL ENGINEERING SCIENCE, Vol: 60, Pages: 523-533, ISSN: 0009-2509

Journal article

Asbjörnsson J, Kelsall GH, Vaughan DJ, Pattrick RAD, Wincott PL, Hope GAet al., 2004, Electrochemical and surface analytical studies of tennantite in acid solution, JOURNAL OF ELECTROANALYTICAL CHEMISTRY, Vol: 570, Pages: 145-152, ISSN: 1572-6657

Journal article

Abraitis PK, Pattrick RAD, Kelsall GH, Vaughan DJet al., 2004, Acid leaching and dissolution of major sulphide ore minerals: processes and galvanic effects in complex systems, MINERALOGICAL MAGAZINE, Vol: 68, Pages: 343-351, ISSN: 0026-461X

Journal article

Guerra E, Kelsall GH, Bestetti M, Dreisinger D, Wong K, Mitchell KAR, Bizzotto Det al., 2004, Use of underpotential deposition for evaluation of overpotential deposition kinetics of reactive metals, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 151, Pages: E1-E6, ISSN: 0013-4651

Journal article

Asbjörnsson J, Kelsall GH, Pattrick RAD, Vaughan DJ, Wincott PL, Hope GAet al., 2004, Electrochemical and surface analytical studies of enargite in acid solution, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 151, Pages: E250-E256, ISSN: 0013-4651

Journal article

Dawson RJ, Kelsall GH, 2004, Process for recovering precious metal from a precious metal-containing material, GB 0424540.3

Patent

Brandon NP, Pilone D, Kelsall GH, Yin Qet al., 2003, Simultaneous recovery of Pb and PbO<sub>2</sub> from battery plant effluents.: Part II, 6th European Symposium on Electrochemical Engineering, Publisher: KLUWER ACADEMIC PUBL, Pages: 853-862, ISSN: 0021-891X

Conference paper

Pilone D, Kelsall GH, 2003, Mathematical modelling of electrowinning multiple metals at a porous electrode, 6th international symposium on electrochemistry in mineral and metal processing, Paris, Publisher: Electrochemical Society, Pages: 260-271

Conference paper

Abraitis PK, Pattrick RAD, Kelsall GH, Vaughan DJet al., 2003, Acid leaching and dissolution of major sulfide ore minerals: processes and galvanic effects in complex systems, 6th international symposium on electrochemistry in mineral and metal processing, Paris, Publisher: Electrochemical Society, Pages: 143-154

Conference paper

Doyle FM, Kelsall GH, Woods R, 2003, Electrochemistry in mineral and metal processing VI, proceedings volume 2003-18, N.J., Publisher: The Electrochemical Society, Inc, ISBN: 9781566774017

Book

Pilone D, Kelsall GH, 2003, Metal recovery from electronic scrap by leaching and electrowinning IV, Washington, 5th international symposium on hydrometallurgy in honor of Ian M Ritchie, Vancouver, Canada, 24 August 2003, Publisher: Mineralogical Soc America, Pages: 1565-1575

Conference paper

Asbjornsson J, Kelsall GH, Pattrick RAD, Vaughan DJ, Wincott PL, Hope GAet al., 2003, Electrochemical behaviour and surface characterisation of enargite (Cu~3AsS~4) in 0.1 M HCl, 6th international symposium on electrochemistry in mineral and metal processing, Paris, Publisher: Electrochemical Society, Pages: 15-26

Conference paper

Asbjornsson J, Kelsall GH, Vaughan DJ, Pattrick RAD, Wincott PL, Hope GAet al., 2003, Electrochemical behaviour and surface characterisation of tennantite in 0.1 M HCl, 6th international symposium on electrochemistry in mineral and metal processing, Paris, Publisher: Electrochemical Society, Pages: 37-47

Conference paper

Jiang JQ, Graham N, André C, Kelsall GH, Brandon Net al., 2002, Laboratory study of electro-coagulation-flotation for water treatment, WATER RESEARCH, Vol: 36, Pages: 4064-4078, ISSN: 0043-1354

Journal article

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