The effect of particle size on the pollution reduction potential of a South African coal-derived low-smoke fuel

Sumbane-Prinsloo, Lungile; Bunt, John R.; Matjie, R.H.; Neomagus, Hein W.J.P.; Waanders, F.B.

doi:10.1016/j.engeos.2020.06.006

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…The PM, SO2 and VOC emissions show a strong dependence on the ash percentage and volatile matter yields, which both increased along with increasing particle size. The work [37] shows that the PM, SO2 and VOC emissions were found to depend only on particle size on a mechanistic level. The VOCs and PM emission factors are inversely correlated with particle size.…”

Section: Results and Analysismentioning

confidence: 93%

Possibilities and Generated Emissions of Using Wood and Lignin Biofuel for Heat Production

et al. 2021

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Energy (including thermal) needs are growing rapidly worldwide thus leading to increased energy production. Considering stricter requirements for the employment of non-renewable energy sources, the use of biofuel in energy facilities appears as one of the best options, having high potential for growth that will increase in the long run both in the Baltic region and the European Union as a whole. This publication investigates the possibilities of using various blends of biofuel containing lignin for heat production and emissions to the air during combustion processes. The paper examines the chemical composition of lignin and bottom ash and explores the impact of a different ratio of lignin in the fuel mixture, the effect of the power of biofuel combustion plants (boilers) and the influence of fuel supply to the combustion chamber on gaseous pollutants (CO, NOx, SO2) and particulate matter emissions. The results of the conducted study demonstrate that, in contrast to pure lignin, the concentrations of alkali metals, boron and, to a lesser extent, nickel and chlorine have increased the most in bottom ash. The use of lignin can effectively reduce the need for conventional biofuel by 30–100% and to increase the temperature of exhaust gases. The lowest emissions have been observed using a mixture of 30% of lignin and biofuel at the lowest range of power (2.5–4 MW). Under the optimal oxygen/temperature mode, carbon monoxide concentrations are approximately 20 mg/Nm3 and those of nitrogen oxides–500 mg/Nm3. Particulate matter emissions reach 150 mg/Nm3, and hence applying air treatment equipment is required.

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Section: Results and Analysismentioning

confidence: 93%

Possibilities and Generated Emissions of Using Wood and Lignin Biofuel for Heat Production

et al. 2021

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“…Since the connectivity between the pores is poor, the mercury removal efficiency is low (Figure ). − Poor connectivity within the core is the result of a combination of various reservoir factors, such as pore size, pore-to-throat ratio, microfractures, and heterogeneity. − The combined effect of these factors leads to a low mercury removal efficiency, and a large amount of mercury remains in the pores. Therefore, in the process of oilfield development, a large amount of remaining oil cannot be produced. , …”

Section: Discussionmentioning

confidence: 99%

Experimental Study on the Optimization of Multi-level Nano–Microsphere Deep Profile Control in the Process of Gas Injection in Fracture-Type Buried-Hill Reservoirs

et al. 2021

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Fracture-type buried-hill reservoirs refer to dual media which have a fast breakthrough speed and a low sweep efficiency in the process of gas injection displacement. In order to overcome this problem, in this paper, a new profile control and oil displacement technology of preslug deep plugging by injection of different levels of nano−microspheres and natural gas was proposed. The mercury intrusion experiments were used to compare the fractal characteristics of the pore structures of the matrix and artificial fractured cores in the buried-hill reservoir. The results show that the heterogeneous characteristics of pores and fractures are the main factors leading to excessive gas breakthrough. Three nano− microsphere systems (WJ1, WJ2, and WJ3) with good temperature resistance, salt resistance, swelling properties, and stability were prepared using the inverse emulsion method. Core plugging performance tests show that WJ3 has the best plugging effect among the three nano−microsphere systems, followed by WJ2 and WJ1. According to the scanning electron microscopy observations, it was found that the sealing mechanism of nano−microspheres includes direct sealing, bridging sealing, adhesive sealing, direct pass, deformed pass, and crushing pass. Finally, the displacement experiments with a composite fractured core showed that compared with pure natural gas injection, the breakthrough time of the combined displacement process of nano−microspheres and natural gas was greatly extended, and the final oil displacement efficiency was increased to greater than 80%.

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Chemometric analysis of air pollutants in raw and thermally treated coals – Low-emission fuel for domestic applications, with a reduced negative impact on air quality

Muzyka

Chrubasik

Pogoda

et al. 2021

Journal of Environmental Management

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The effect of particle size on the pollution reduction potential of a South African coal-derived low-smoke fuel

Cited by 3 publications

References 24 publications

Possibilities and Generated Emissions of Using Wood and Lignin Biofuel for Heat Production

Possibilities and Generated Emissions of Using Wood and Lignin Biofuel for Heat Production

Experimental Study on the Optimization of Multi-level Nano–Microsphere Deep Profile Control in the Process of Gas Injection in Fracture-Type Buried-Hill Reservoirs

Chemometric analysis of air pollutants in raw and thermally treated coals – Low-emission fuel for domestic applications, with a reduced negative impact on air quality

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