Zobrazeno 1 - 10 of 110 pro vyhledávání: '"J.C. van Dyk"'
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Akademický článek
Protein and fat meal content increase insulin requirement in children with type 1 diabetes â Role of duration of diabetes
Autor: M. van der Hoogt, J.C. van Dyk, R.C. Dolman, M. Pieters
Publikováno v: Journal of Clinical & Translational Endocrinology, Vol 10, Iss , Pp 15-21 (2017)
Background and objective: Hyperglycaemia remains a challenge in type 1 diabetes since current regimes used to determine meal insulin requirements prove to be ineffective. This is particularly problematic for meals containing high amounts of protein a
Externí odkaz: https://doaj.org/article/a2649ae58b344308abd2eb8df5e96a58
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2
Production of sodium-based zeolites and a potassium-containing leach liquor by alkaline leaching of South African coal fines ash
Autor: A.C. Collins, C.A. Strydom, R.H. Matjie, J.R. Bunt, J.C. van Dyk
Publikováno v: Journal of the Southern African Institute of Mining and Metallurgy, Volume: 123, Issue: 3, Pages: 145-155, Published: MAR 2023
South African coal discards derived from feed coal for thermoprocesses pose human health and environmental problems and incur high disposal costs. These issues need to be resolved. Coal fines and a coal fines/ K2CO3 blend were combusted at 700°C in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca489b0e08ed62b7052a1421a306b9ba
https://doi.org/10.17159/2411-9717/1167/2023
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3
Production of Al(HI)-K(I)-Ti(IV)-sulphate-containing leach liquor from metakaolinite-containing ash derived from South African coal fines
Autor: A.C. Collins, C.A. Strydom, R.H. Matjie, J.R. Bunt, J.C. van Dyk
Publikováno v: Journal of the Southern African Institute of Mining and Metallurgy, Volume: 122, Issue: 8, Pages: 473-486, Published: AUG 2022
South African discard coal fines and K2CO3 blends were heated in a laboratory-scale rotary kiln to produce ashes for H2SO4 leaching tests. The optimized H2SO4 leaching conditions of 6.12 mol.dm3 (M) H2SO4, solid to liquid ratios 1:5 and 1:10, and 8o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83e6c5ac1cd98513153f5034068acee4
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532022000800010&lng=en&tlng=en
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5
The influence of the roof and floor geological structures on the ash composition produced from coal at UCG temperatures
Autor: R.H. Matjie, Christien A. Strydom, J.C. Van Dyk, R.C. Uwaoma, John R. Bunt
Publikováno v: International Journal of Coal Preparation and Utilization. 40:247-265
The mineralogy of the ash and slag formed at typical UCG temperatures were investigated using a bituminous coal from the Theunissen UCG site in the Free State province of South Africa. The ash and slag samples were produced from the coal, and the sur
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::062ce7fd09b96d05a4a4035661940c5f
https://doi.org/10.1080/19392699.2018.1479260
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6
Conceptual use of vortex technologies for syngas purification and separation in UCG applications
Autor: J. Brand, J.C. Van Dyk, F.B. Waanders
Publikováno v: Journal of the Southern African Institute of Mining and Metallurgy, Volume: 118, Issue: 10, Pages: 1029-1039, Published: OCT 2018
Syngas from Africary's Theunissen underground coal gasification (UCG) project will be used for power production and synthesis of liquid fuels and commodity chemicals. However, some of the coal components, especially condensable water, oils, tars, ino
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4e0e7fb1b29deab0f3c3f8e7355c39c
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532018001000003&lng=en&tlng=en
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7
Groundwater monitoring during underground coal gasification
Autor: Frans Waanders, J.C. Van Dyk, Christien A. Strydom, J. Brand
Publikováno v: Journal of the Southern African Institute of Mining and Metallurgy, Volume: 118, Issue: 10, Pages: 1021-1028, Published: OCT 2018
Underground coal gasification (UCG) is a fast-emerging, in situ mining technology that provides access to low-cost energy through the utilization of coal reserves that are currently not technically or economically exploitable by conventional mining m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e791d102a23df8d8da0c4da48527102c
http://www.scielo.org.za/pdf/jsaimm/v118n10/02.pdf
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8
SAUCGA: The potential, role, and development of underground coal gasification in South Africa
Autor: M. van der Riet, J. Feris, D. Love, S. Kauchali, Christien A. Strydom, J.C. Van Dyk, J. Brand, S. Pershad
Publikováno v: Journal of the Southern African Institute of Mining and Metallurgy, Volume: 118, Issue: 10, Pages: 1009-1019, Published: OCT 2018
This paper offers an introduction to and strategic context for the other papers included in this special UCG edition of the Journal of the Southern African Institute of Mining and Metallurgy. South Africa is facing long-term energy security challenge
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f61d3e859d91a53e26c6176be5cba1f6
https://doi.org/10.17159/2411-9717/2018/v118n10a1
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9
Influence of discard mineral matter on slag–liquid formation and ash melting properties of coal – A FACTSAGETM simulation study
Autor: J.C. van Dyk, M.J. Keyser
Publikováno v: Fuel. 116:834-840
The ash fusion temperature (AFT) profile of a coal is one of the parameters currently widely used in coal marketing and utilization to assess coal ash fusibility and melting characteristics, and to predict the melting behaviour of the coal ash in coa
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::563dc00a160040d81ae640809ddbe413
https://doi.org/10.1016/j.fuel.2013.06.002
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10
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