Adoption of advanced coal gasification: A panacea to carbon footprint reduction and hydrogen economy transition in South Africa

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 77, P. 301 - 323

Published: June 17, 2024

Language: Английский

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Evaluating the electronic and structural basis of carbon selenide-based quantum dots as photovoltaic design materials: A DFT and ML analysis

Solar Energy, Journal Year: 2024, Volume and Issue: 284, P. 113068 - 113068

Published: Nov. 4, 2024

Language: Английский

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Sustainable aviation fuels: A meta-review of surveys and key challenges

Journal of the Air Transport Research Society, Journal Year: 2025, Volume and Issue: unknown, P. 100056 - 100056

Published: Jan. 1, 2025

Language: Английский

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Exploring Economic Expansion of Green Hydrogen Production in South Africa

Sustainability, Journal Year: 2025, Volume and Issue: 17(3), P. 901 - 901

Published: Jan. 23, 2025

Hydrogen is a crucial energy carrier for the Clean Energy Sustainable Development Goals and just transition to low/zero-carbon energy. As top CO2-emitting country, hydrogen (especially green hydrogen) production in South Africa has gained momentum due availability of resources, such as solar energy, land, wind platinum group metals (as catalysts electrolysers), water. However, demand insignificant, which implies that majority must be exported. Despite positive developments, there are unclear matters, dependence on national electricity grid cost transporting it Asian European markets. Hence, this study aims explore opportunities economic expansion sustainable production, transportation, storage, utilisation produced Africa. This paper uses thematic literature review methodology. The key findings available renewable sources, incentivizing economy, carbon taxation, increasing could decrease from 3.54 1.40 €/kgH2 thus stimulate its usage, export. appeal lies diversifying products an carrier, clean electricity, synthetic fuels, ammonia methanol, fertilizers, steel with principal purpose significant decarbonisation foreign earnings. These expected drive African revolution agreement AU 2063 agenda.

Language: Английский

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Aircraft performance of a novel SAF: Lower costs, lower environmental impact, and higher aircraft performance

Energy Conversion and Management X, Journal Year: 2024, Volume and Issue: unknown, P. 100739 - 100739

Published: Oct. 1, 2024

Language: Английский

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Transforming Waste to Wealth: Harnessing Carbon Dioxide for Sustainable Solutions

Results in Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: unknown, P. 100321 - 100321

Published: Oct. 1, 2024

Language: Английский

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Performance and Emissions Assessment of a Micro-Turbojet Engine Fueled with Jet A and Blends of Propanol, Butanol, Pentanol, Hexanol, Heptanol, and Octanol

Fire, Journal Year: 2025, Volume and Issue: 8(4), P. 150 - 150

Published: April 8, 2025

This study examines the impact of alcohol blends on performance and emissions aviation micro-turbojet engines. Thus, propanol, butanol, pentanol, hexanol, heptanol, octanol were tested at 10%, 20%, 30% concentrations mixed with Jet A, as well an additional 5% heptanol blend to preserve base fuel properties, a JetCat P80 micro-turbojet. Physicochemical properties such density, viscosity, elemental composition analyzed before engine testing. Carbon dioxide (CO2) from 1 kg combustion varied, propanol yielding lowest 3.02 CO2 per highest 3.22 fuel. The following results obtained: lowered exhaust gas temperature by up 7.5% idle intermediate thrust but slightly increased it maximum power; mass flow concentration, peaking 20.4% above A for propanol; varied −4.92% +7.4%. While specific consumption 12.8% thermal efficiency declined 1.8–5.6% remained within ±2% A. Butanol emerged viable alternatives, balancing reduction efficiency. emphasize need optimal trade-off between environmental performance.

Language: Английский

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Methane and carbon dioxide post-combustion capturing: A step towards low carbon aviation fuel

Energy Reports, Journal Year: 2025, Volume and Issue: 13, P. 2230 - 2244

Published: Feb. 5, 2025

Language: Английский

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Activated Carbons as Supports for Sulfided Mo-Based Catalysts Intended for the Hydroprocessing of Lipidic Feedstocks

Catalysts, Journal Year: 2025, Volume and Issue: 15(4), P. 359 - 359

Published: April 6, 2025

The production of hydrocarbon-based biofuels has been the target intense research worldwide. In this context, core goal present work was to investigate use mesopore-rich activated carbons (ACs) as support for sulfided Mo-based catalysts intended hydroprocessing lipidic feedstocks. key motivations were that, in comparison traditional inorganic supports such Al2O3, ACs are less propense form coke, due their lower acidity, and highly resistant hydrolysis, which is a very important aspect feedstocks because water abundantly produced during process. Furthermore, porosity can be tailored give rise high mesopore content, improving access bulky triglyceride molecules metallic active sites located inside pores network. A systematic study on effects preparation conditions properties performance obtained carried out first time. highest hydrodeoxygenation (HDO) activity verified catalyst prepared through sequential deposition Mo Ni by wet impregnation. presented better coconut oil HDO than an industrial NiMo/Al2O3 catalyst. it good stability, provided that sulfidation degree kept high. results evidenced have great potential replace catalysts.

Language: Английский

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Major Resources for Green Aviation Fuel Production, Challenges, and Opportunities

Sustainable aviation, Journal Year: 2025, Volume and Issue: unknown, P. 95 - 124

Published: Jan. 1, 2025

Language: Английский

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