Major Mabuza

• Doctor of Engineering
• Senior Lecturer and Head of Department at University of Johannesburg

Carbon sequestration in unmineable coal seams has been proposed as one of the most attractive technologies to mitigate carbon dioxide (CO 2 ) emissions in which CO 2 is stored in the microporous structure of the coal matrix in an adsorbed state. The CO 2 adsorption process is hence considered one of the more effective methodologies in environmental...

In the view of the current environmental problems, especially in the light of mitigating the effect of global warming due to anthropogenic carbon dioxide (CO2) emissions to the atmosphere, numerous technologies have been proposed like CO2 sequestration in deep and unmineable coal seams. This paper presents advanced characterization of two South Afr...

High pressure sorption equipment are based on the gravimetric or volumetric principle method of gas sorption onto a specific sorbent. This paper discusses the design, construction and performance consistency testing that was conducted on a recently constructed in-house high pressure volumetric sorption system (HPVSS) in South Africa (SA) which was...

Numerous studies have been carried out recently on the sequestration of carbon dioxide (CO2), a greenhouse gas, produced due to human activities. Consequently, storage of CO2 in storage sites, such as unmineable coal seams, has been identified as one of the promising options with the advantage of recovering coal-bed methane (CH4). However, CO2 inje...

The effect of SO2 in feed stream on CO2 sorption capacity of unmineable South African coal seams during CO2 sequestration was studied. Laboratory studies were carried out using a synthetic flue gas (99.5% CO2/ 0.5% SO and 98.5% CO2/1.5% SO2) in a high pressure volumetric experimental setup connected with an on-line gas-chromatograph was used. The e...

Almost all the literature related to engineering education tends to overlook the pre-1994 events and how they may have impacted the current curriculum of the engineering discipline in the South African context. The pre- and post-apartheid engineering curriculum evaluation has been a challenge because of weak episodical and often self-centred discus...

Significant progress has recently been made in carbon sequestration in unmineable coal seams, including the coal physicochemical properties and environmental parameters that may affect the sequestration process. However, the effect of prolonged exposure to a flue gas on the pore structural changes of coals have not yet been considered. This study p...

The study was aimed at evaluating the CO2 adsorption capacity of various South African coal types to determine the effects of pressure, coal rank and coal composition with regard to their maceral and mineral content. Pure CO2 adsorption isotherms were measured at 35 °C and up to a maximum pressure of ∼85 bar using the volumetric method. Higher rank...

The effects of coal rank, coal composition, and pressure on the CO2 adsorption capacity of five South African coal samples were evaluated. Adsorption isotherms of the flue gases on coal were measured at 35 °C and up to a maximum pressure of 88 bar using the volumetric method. The flue gases used were simulated industrial flue gases of a coal fired...