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A comparison of hydrogen storage capacity of commercial and fly ash-derived zeolite X together with their respective templated carbon derivatives

Author: Musyoka, Nicholas M ; Ren, Jianwei ; Langmi, Henrietta W ; North, Brian C ; Mathe, Mahlanyane K Date: Oct 2015 This paper presents comparative results of structural, morphological and hydrogen sorption properties between commercial and fly ash-derived zeolite X including their respective templated carbon derivatives. The surface area of commercial ... Read more
Fate of sulphate removed during the treatment of circumneutral mine water and acid mine drainage with coal fly ash: Modelling and experimental approach

Author: Madzivire, G ; Gitari, WM ; Kumar Vadapalli, VR ; Ojumu, TV ; Petrik, LF Date: Oct 2011 The treatment of acid mine drainage (AMD) and circumneutral mine water (CMW) with South African coal fly ash (FA) provides a low cost and alternative technique for treating mine wastes waters. The sulphate concentration in AMD can be reduced ... Read more
Influence of aluminium source on the crystal structure and framework coordination of Al and Si in fly ash-based zeolite NaA

Author: Ameh, AE ; Fatoba, OO ; Musyoka, Nicholas M ; Petrik, LF Date: Jan 2017 In this study zeolite NaA with different crystal sizes and % crystallinity was prepared from a clear solution extract of fused fly ash. Sodium aluminate or aluminium hydroxide was used to adjust the aluminium content in the fused fly ash ... Read more
Integrated acid mine drainage management using fly ash

Author: Vadapalli, VRK ; Gitari, MW ; Petrik, LF ; Etchebers, O ; Ellendt, A Date: Jan 2012 Fly Ash (FA) from a power station in South Africa was investigated to neutralise and remove contaminants from Acid Mine Drainage (AMD). After this primary treatment the insoluble FA residue namely solid residue (SR) was investigated as a ... Read more
Preparation of carbon nanofibers/tubes using waste tyres pyrolysis oil and coal fly ash derived catalyst

Author: Rambau, Khavharendwe MA ; Musyoka, Nicholas M ; Manyala, N ; Ren, Jianwei ; Langmi, Henrietta W ; Mathe, Mahlanyane K Date: May 2018 In this study, two waste materials namely; coal y ash (CFA) and waste tyres pyrolysis oil, were successfully utilized in the synthesis of carbon nanofibers/tubes (CNF/Ts). In addition, Fe-rich CFA magnetic fraction (Mag-CFA) and ethylene gas ... Read more
Surface chemical properties of novel high surface area solids synthesized from coal fly ash

Author: Pretorius, PJ ; Woolard, CD Date: 23 Jul 2003 The zeolite, Na-P1, was synthesized from fly ash samples originating from coal-fired power stations in South Africa by hydrothermal treatment of the raw ash with concentrated aqueous NaOH solutions. The zeolite was then further modified by ... Read more
Synthesis of a hierarchically structured zeolite-templated carbon starting from fly ash-derived zeolite X

Author: Musyoka, Nicholas M ; Langmi, Henrietta W ; North, Brian C ; Mathe, Mahlanyane K ; Bessarabov, D Date: May 2014 A hierarchically structured zeolite derived from coal fly ash was used as a hard templating agent for the synthesis of a templated carbonaceous material. The samples were characterized using XRD, SEM, TEM, TGA, EDS and BET. The resulting ... Read more
Synthesis of zeolite NaA membrane from fused fly ash extract

Author: Ameh, AE ; Musyoka, Nicholas M ; Fatoba, OO ; Syrtsova, DA ; Teplyakov, VV ; Petrik, LF Date: Jan 2016 Zeolite-NaA membranes were synthesized from an extract of fused South African fly ash on a porous titanium support by a secondary growth method. The influence of the synthesis molar regime on the formation of zeolite NaA membrane layer was ... Read more
Transformation of South African coal fly ash into ZSM-5 zeolite and its application as an MTO catalyst

Author: Missengue, RNM ; Losch, P ; Sedres, G ; Musyoka, Nicholas M ; Fatoba, OO ; Louis, B ; Pale, P ; Petrik, LF Date: Jan 2017 This study presents a way of using South African coal fly ash by extracting metals such as Al and Fe with concentrated sulphuric acid, and then using the solid residue as a feedstock for the synthesis of ZSM-5 zeolite. The percentage of ... Read more

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Browsing by Subject "Fly ash"

Browsing by Subject "Fly ash"

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