Electrical and Optical Characterization of Acetylene RF CCP for Synthesis of Different Forms of Hydrogenated Amorphous Carbon Films

Aldeeb, Mustafa A.; Morgan, Nasser N.; Abouelsayed, A.; Amin, Khaled M.; Hassaballa, Safwat

doi:10.1007/s11090-019-10031-8

Cited by 5 publications

(4 citation statements)

References 46 publications

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“…Within the RF-ICP discharge, it is primarily the electrons that play a pivotal role in driving the excitation and ionization processes occurring in the discharge; this is because only electrons can swiftly navigate the rapidly changing electric field. In contrast, ions within the RF discharge are less influential and do not significantly contribute to the RF plasma discharge due to their limited mobility [66]. The high-frequency magnetic field in RF-ICP serves as the driving force for accelerating electrons, elevating their energy levels significantly.…”

Section: Resultsmentioning

confidence: 99%

Analysis of Essential Features and Optimal Operational Parameters of an RF-ICP Torch for Waste Treatment Applications

Aldeeb,

Abu Darda,

Damideh

et al. 2024

Recycling

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Recently, plasma-based pyrolysis has gained increasing prominence as a technology in response to the growing challenges in waste disposal and the recognition of opportunities to generate valuable by-products. The efficiency of the pyrolysis process is intricately tied to the characteristics of the plasma involved, particularly the effective electron temperature (Teff) and plasma density (ne). This study aimed to conduct a comprehensive examination of the essential features and optimal operational parameters of a developed RF-ICP torch specifically designed for small-scale municipal solid waste (MSW) pyrolysis (mixture of paper and polypropylene) with the goal of controlling both the torch and the overall process. Using optical emission spectroscopy (OES), we measured plasma parameters, specifically (Teff) and (ne), while varying argon gas flow rates and RF powers. The (Teff) and (ne)were determined using the Boltzmann plot and Stark broadening, respectively. The RF torch was found to generate (ne) up to approximately 2.8×1020 cm−3 and (Teff) up to around 8200 K, with both parameters being controlled by the discharge power and gas flow rate. Additionally, a power-losing mechanism, namely the anomalous skin effect, was detected during the study, which is uncommon in atmospheric plasma discharge.

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Section: Resultsmentioning

confidence: 99%

Analysis of Essential Features and Optimal Operational Parameters of an RF-ICP Torch for Waste Treatment Applications

Aldeeb,

Abu Darda,

Damideh

et al. 2024

Recycling

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“…Table 1 shows the wavelengths, excitation energy for the upper excited level (Ek), transition probability (Aik), and statistical weight (gk) for the upper excited level taken from NIST for every line that appeared. Due to their higher mobility relative to ions and ability to follow the electric field, electrons in RF plasma discharge oversee the ionization and excitation processes [22,23]. Figure 3 (a, b) displays the variation of the intensity of ArI lines with the RF power at gas flow rates of 2 and 4 L/min, respectively.…”

Section: Resultsmentioning

confidence: 99%

Optical Characterization of RF Plasma Torch for Municipal Solid Waste (MSW) Treatment Process

Aldeeb¹,

Darda²,

Damideh³

et al. 2023

Preprint

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Over the past decade, plasma waste treatment has become a more prominent technology due to increasing problems with waste disposal and realizing opportunities to generate valuable co-products. Plasma waste treatment extensively uses atmospheric pressure (RF) inductive coupled plasma (ICP) torches. In situ Optical Emission Spectroscopy (OES) is used to evaluate the developed RF ICP torch for Municipal Solid Waste (MSW) treatment and ascertain the plasma parameters to understand the physical mechanism involved. The argon plasma jet's electron temperature and plasma density outside the torch chamber are calculated using the Boltzmann plot and Stark broadening at different gas flow rates, and RF power. The expected electron temperature and plasma density behaviour were observed at a low gas flow rate. The electron temperature decreases with the RF power from 8089 K to 6097 K as demand for increasing the plasma density. An energy loss mechanism was revealed while raising the gas flow rate, as the electron temperature increases with RF power from 5750 K to 6221 K, and the plasma density decreases. This behaviour is due to the anomalous skin effect. Detecting and avoiding this phenomenon is essential as it negatively affects torch energy efficiency and waste treatment.

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“…This is because only electrons can swiftly navigate the rapidly changing electric field. In contrast, ions within the RF discharge are less influential and do not significantly contribute to the RF plasma discharge due to their limited mobility [50]. The high-frequency magnetic field in RF-ICP serves as the driving force for accelerating electrons, elevating their energy levels significantly.…”

Section: Resultsmentioning

confidence: 99%

Efficient Waste Management via Tuning Plasma Properties in Radio Frequency Inductively Coupled Plasma

A. Aldeeb,

Abu Darda,

Damideh

et al. 2023

Preprint

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In the last ten years, plasma waste treatment has gained increasing prominence as a technology in response to growing challenges in waste disposal and the recognition of opportunities for generating valuable by-products. The efficiency and outcomes of this process are intricately linked to the characteristics of the plasma involved, such as plasma enthalpy and heat flux. We employed an experimental radio frequency inductively coupled plasma (RF-ICP) torch operating at atmospheric pressure to generate plasma. Utilizing optical emission spectroscopy (OES), we measured plasma parameters, specifically the effective electron temperature (Teff) and plasma density (ne), while varying argon gas flow rates and RF powers. Our investigations revealed that both flow rate and RF power exert significant control over plasma parameters, and we observed an unusual phenomenon within this range of discharge pressures. Consequently, both the plasma's enthalpy and the heat flux it generates are influenced by variations in both flow rate and RF power.

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Electrical and Optical Characterization of Acetylene RF CCP for Synthesis of Different Forms of Hydrogenated Amorphous Carbon Films

Cited by 5 publications

References 46 publications

Analysis of Essential Features and Optimal Operational Parameters of an RF-ICP Torch for Waste Treatment Applications

Analysis of Essential Features and Optimal Operational Parameters of an RF-ICP Torch for Waste Treatment Applications

Optical Characterization of RF Plasma Torch for Municipal Solid Waste (MSW) Treatment Process

Efficient Waste Management via Tuning Plasma Properties in Radio Frequency Inductively Coupled Plasma

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