A review of recent developments and future prospects in gasification systems and their modeling

Janajreh, Isam; Adeyemi, Idowu; Raza, Syed Shabbar; Ghenaï, Chaouki

doi:10.1016/j.rser.2020.110505

Cited by 89 publications

(27 citation statements)

References 170 publications

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“…Although this process is beneficial because of the abovementioned facts, its complexity should not be underestimated, as described below. [20,[22][23][24][25]). The separation of the hydrocarbons/partially cracked plastics and char is for the sake of illustration.…”

Section: Opportunities and Challenges Of Pwgmentioning

confidence: 99%

“…This is while many of the designs and operations of the PWG are based on experience from coal or biomass gasifiers. This can be inferred from the review articles in the field of gasification (general) or PWG [20,25,[31][32][33][34][35][36], in which no (or very small) discussion has been made on the presence of molten plastic and liquid phase.…”

Section: Opportunities and Challenges Of Pwgmentioning

confidence: 99%

“…Nevertheless, such experimental approaches are time-consuming and resource-intensive, and scale-up studies using experimental approaches remain not straightforward. Fortunately, a [20,[22][23][24][25]). The separation of the hydrocarbons/partially cracked plastics and char is for the sake of illustration.…”

Section: Numerical Modelingmentioning

confidence: 99%

“…Figure 4. An overview of the plastic gasification process and the reactions taking place (the equations are taken from[20,[22][23][24][25]). The separation of the hydrocarbons/partially cracked plastics and char is for the sake of illustration.…”

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confidence: 99%

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Multi-Scale Modeling of Plastic Waste Gasification: Opportunities and Challenges

et al. 2022

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Among the different thermo-chemical recycling routes for plastic waste valorization, gasification is one of the most promising, converting plastic waste into syngas (H2+CO) and energy in the presence of an oxygen-rich gas. Plastic waste gasification is associated with many different complexities due to the multi-scale nature of the process, the feedstock complexity (mixed polyolefins with different contaminations), intricate reaction mechanisms, plastic properties (melting behavior and molecular weight distribution), and complex transport phenomena in a multi-phase flow system. Hence, creating a reliable model calls for an extensive understanding of the phenomena at all scales, and more advanced modeling approaches than those applied today are required. Indeed, modeling of plastic waste gasification (PWG) is still in its infancy today. Our review paper shows that the thermophysical properties are rarely properly defined. Challenges in this regard together with possible methodologies to decently define these properties have been elaborated. The complexities regarding the kinetic modeling of gasification are numerous, compared to, e.g., plastic waste pyrolysis, or coal and biomass gasification, which are elaborated in this work along with the possible solutions to overcome them. Moreover, transport limitations and phase transformations, which affect the apparent kinetics of the process, are not usually considered, while it is demonstrated in this review that they are crucial in the robust prediction of the outcome. Hence, possible approaches in implementing available models to consider these limitations are suggested. Finally, the reactor-scale phenomena of PWG, which are more intricate than the similar processes—due to the presence of molten plastic—are usually simplified to the gas-solid systems, which can result in unreliable modeling frameworks. In this regard, an opportunity lies in the increased computational power that helps improve the model’s precision and allows us to include those complexities within the multi-scale PWG modeling. Using the more accurate modeling methodologies in combination with multi-scale modeling approaches will, in a decade, allow us to perform a rigorous optimization of the PWG process, improve existing and develop new gasifiers, and avoid fouling issues caused by tar.

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Section: Opportunities and Challenges Of Pwgmentioning

confidence: 99%

Section: Opportunities and Challenges Of Pwgmentioning

confidence: 99%

Section: Numerical Modelingmentioning

confidence: 99%

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confidence: 99%

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Multi-Scale Modeling of Plastic Waste Gasification: Opportunities and Challenges

et al. 2022

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“…The carbonaceous and volatile part of the feedstock is gasified into syngas [31], while the inorganic compounds and polymer are melted to form a glass-like structure called a glass-like structure vitrified slag. The slag has various usages and contributes as raw materials for tiles, road construction, and landscaping.…”

Section: Introduction To Technologymentioning

confidence: 99%

A comprehensive review of the application of plasma gasification technology in circumventing the medical waste in a post-COVID-19 scenario

Kaushal

Rohit

Dhaka

2022

Biomass Conv. Bioref.

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The recent COVID-19 pandemic, which has hit the world, is third in the last two decades. The safety and precaution measures have led to the generation of a colossal pile of biomedical waste, including plastic waste, due to the usage of personal protective equipment kits and safety equipment that is not easily manageable. The environment and health and safety concerns for humans require biomedical waste to be treated with an outstanding treatment process that can help humanity manage it by adhering to strict environmental norms prescribed. The plasma gasification technology is the most beneficial and efficient technology for treating biomedical waste. The byproducts generated can be utilized further as valuable inputs in other industries, thus strengthening the circular economy concept. In this research paper, the applicability of plasma gasification for the treatment of biomedical waste in the present scenario has been reviewed. The feasibility and applicability of the technology in handling biomedical waste have been reviewed via various research articles in this study. Also, further steps have been suggested for the Indian scenario to make this technology commercially viable in the long run.

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Flexible strategies for carbon‐negative syngas and biochar poly‐generation via a novel chemical looping approach

Liu,

Sun,

Wang

et al. 2024

AIChE Journal

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This work proposed a pyrolysis chemical looping reforming‐two stage regeneration (PCLR‐TR) process with carbon‐negative syngas and biochar poly‐generation，aimed at overcoming challenges in chemical looping gasification. The process effectively separates pyrolysis and reforming, circumventing slow solid–solid reactions and enabling the flexible adjustment of the H2/CO ratio. The two‐stage regeneration ensures improved synchronization of reaction rates across different reactors. The results indicate that manipulation of process parameters allows for flexible adjustment of the H2/CO ratio in syngas (ranging from 1.02 to 3.83). The introduction of CO2 feed in the first stage regeneration reactor reduces the oxygen carrier exothermic intensity in the second stage regeneration reactor by 58%. Optimization results suggest that the generated syngas is compatible with diverse downstream applications, exhibiting a maximum CO2 negative emission of 1.85 kg/kg syngas. The PCLR‐TR system offers a versatile and environmentally friendly solution for the energy and chemical industries.

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A review of recent developments and future prospects in gasification systems and their modeling

Cited by 89 publications

References 170 publications

Multi-Scale Modeling of Plastic Waste Gasification: Opportunities and Challenges

Multi-Scale Modeling of Plastic Waste Gasification: Opportunities and Challenges

A comprehensive review of the application of plasma gasification technology in circumventing the medical waste in a post-COVID-19 scenario

Flexible strategies for carbon‐negative syngas and biochar poly‐generation via a novel chemical looping approach

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