Browsing Faculty of Engineering by Title
Now showing items 132-151 of 1122
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Co-pyrolysis of coal and raw/torrefied biomass: a review on chemistry, kinetics and implementation
(Elsevier, 2021)Thermochemical conversion via co-pyrolysis has the potential to be an efficient route for converting biomass to bio-energy and bio-refinery products. In this review, the implementation of co-pyrolysis of torrefied biomass ... -
CO2 reactivity of briquettes derived from discard inertinite-rich Highveld coal using lignosulphonate and resin as binders
(SAIMM, 2019)South African collieries generate approximately 31 Mt of fine and ultrafine coal annually, with the majority of the ultrafine fraction discarded in slurry ponds and underground workings. Use can be made of this energy ... -
Coagulation/flocculation potential of polyaluminium chloride and bentonite clay tested in the removal of methyl red and crystal violet
(Springer, 2017)This study investigated the influence of the physico-chemical properties of methyl red (MR) and crystal violet (CV) on their removal by bentonite clay and polyaluminium chloride (PACl). Different dosages of bentonite clay, ... -
Coal and coal ash characteristics to understand mineral transformations and slag formation
(Elsevier, 2009)A knowledge of the composition and structure of minerals in coal is necessary in order to understand the mineral transformations and agglomerate or slag formation during combustion or gasification. Coal ash fusibility ... -
Coal char temperature profile estimation using optical reflectance for a commercial-scale Sasol-Lurgi FBDB gasifier
(Elsevier, 2008)In the Sasol-Lurgi fixed-bed dry-bottom (FBDB) gasifier the temperature in the combustion zone should not exceed the melting point of the ash-forming minerals, causing them to melt/flow and agglomerate. Sintering of ash ... -
Coal cleaning rejects and sulphide oxidation by Fenton’s reaction
(International Pittsburgh Coal Conference, 2016) -
Coal cleaning residues and Fe-minerals implications
(Springer, 2011)In the present investigation, a study was undertaken to understand the origin of Fe-minerals presents in Brazilian coal mining and to understand the environmental implication and the chemical heterogeneity in the study ... -
Coal cleaning residues and fe-ultrafine particles and fe-minerals consequences
(International Pittsburgh Coal Conference, 2016) -
Coal mining residues and sulphide oxidation by Fenton's reaction
(Swanson School of Engineering, Univ of Pittsburgh, 2015) -
Coal particle and bed physical transformational behaviour after thermochemical conversion in a fixed bed
(Elsevier, 2016)This paper examines the physical transformational behaviour that coal particles and the bed structure undergo in a fixed bed reactor. The transient overfeed configuration is used with feed gas entering from the bottom of ... -
Coal particle chemical transformational behaviour after thermochemical conversion in a fixed bed
(Elsevier, 2016)This paper examines the chemical transformational behaviour that coal particles undergo during conversion in deep packed beds, typically found in industrial combustion and gasification operations. Experiments were performed ... -
Coal power plant wastewater treatment by thermal and membrane technologies
(Wiley, 2019)Abstract This chapter contains sections titled: Introduction -- Mineral Scale Formation -- Scale Formation Mechanisms -- Scale Inhibition Mechanisms -- Characteristics of Anti‐Scaling Agents -- Principles of ... -
Coal product moisture control using stockpiles
(Springer, 2016)The moisture content of product coal is a major factor influencing the efficiency of downstream coal utilization processes. Product stockpiles are often used as a control measure to regulate the moisture content of the ... -
Coal reactivity and selection for solid-based pre-reduction of sponge iron
(Taylor & Francis, 2020)Solid-based direct reduction of iron ore requires the reductant coal to have a suitable CO2 reactivity to achieve optimum pre-reduction within a rotary kiln. The CO2 reactivity is affected by numerous factors including ... -
Coal science de-sulfurization of some brazilian power-coals by low energy ultrasonication
(Swanson School of Engineering, Univ of Pittsburgh, 2015) -
Coal utilization in an uncertain economic world: a South African perspective
(Swanson School of Engineering, Univ of Pittsburgh, 2015) -
Coal-derived low smoke fuel assessment through coal stove combustion testing
(Elsevier, 2017)A study was undertaken to investigate the production of low smoke fuel from coal currently used in low-income households in South Africa. Pyrolysis of large coal lumps was studied as a possible production method, and an ... -
Code-switched English pronunciation modeling for Swahili spoken term detection
(Procedia Computer Science: Spoken Language Technology for Under-resourced Languages, 2016-05)We investigate modeling strategies for English code-switched words as found in a Swahili spoken term detection system. Code switching, where speakers switch language in a conversation, occurs frequently in multilingual ... -
Code-to-code comparison for analysing the steady-state heat transferand natural circulation in an air-cooled RCCS using GAMMA+ and Flownex
(Elsevier, 2015)The GAMMA+ and Flownex codes are both based on a one-dimensional flow network modelling approach and both can account for any complex network of different heat transfer phenomena occurring simultaneously. However, there ... -
Collecting and evaluating speech recognition corpora for 11 South African languages
(Springer, 2011)We describe the Lwazi corpus for automatic speech recognition (ASR), a new telephone speech corpus which contains data from the eleven official languages of South Africa. Because of practical constraints, the amount of ...