Is pyrolysis technology an advisable choice for municipal solid waste treatment from a low carbon perspective?

Zhao, Yan; Yuan, Jian; Zhao, Silan; Chang, Huimin; Li, Rong; Lin, Guannv; Li, Xiang

doi:10.1016/j.cej.2022.137785

Cited by 23 publications

(5 citation statements)

References 24 publications

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“…2021; Zhao et al. 2022). There is a consensus among researchers that the growing anthropogenic emissions are mainly to blame (Farcas & Woods 2009; Mac Dowell et al.…”

Section: Introductionmentioning

confidence: 99%

“…Global climate change is taking place at an unprecedented pace and is expected to have dramatic consequences on humankind from both health and economic perspectives (Babar et al 2021;Zhao et al 2022). There is a consensus among researchers that the growing anthropogenic CO 2 emissions are mainly to blame (Farcas & Woods 2009;Mac Dowell et al 2017;Hepburn et al 2019;Gilmore et al 2022).…”

Section: Introductionmentioning

confidence: 99%

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Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

et al. 2023

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Cryogenic carbon capture (CCC) can preferentially desublimate $\text {CO}_2$ out of the flue gas. A widespread application of CCC requires a comprehensive understanding of $\text {CO}_2$ desublimation properties. This is, however, highly challenging due to the multiphysics behind it. This study proposes a lattice Boltzmann (LB) model to study $\text {CO}_2$ desublimation on a cooled cylinder surface during CCC. In two-dimensional (2-D) simulations, various $\text {CO}_2$ desublimation and capture behaviours are produced in response to different operation conditions, namely, gas velocity (Péclet number $\textit {Pe}$ ) and cylinder temperature (subcooling degree $\Delta T_{sub}$ ). As $\textit {Pe}$ increases or $\Delta T_{sub}$ decreases, the desublimation rate gradually becomes insufficient compared with the $\text {CO}_2$ supply via convection/diffusion. Correspondingly, the desublimated solid $\text {CO}_2$ layer (SCL) transforms from a loose (i.e. cluster-like, dendritic or incomplete) structure to a dense one. Four desublimation regimes are thus classified as diffusion-controlled, joint-controlled, convection-controlled and desublimation-controlled regimes. The joint-controlled regime shows quantitatively a desirable $\text {CO}_2$ capture performance: fast desublimation rate, high capture capacity, and full cylinder utilization. Regime distributions are summarized on a $\textit {Pe}$ – $\Delta T_{sub}$ space to determine operation parameters for the joint-controlled regime. Moreover, three-dimensional simulations demonstrate four similar desublimation regimes, verifying the reliability of 2-D results. Under regimes with loose SCLs, however, the desublimation process shows an improved $\text {CO}_2$ capture performance in three dimensions. This is attributed to the enhanced availability of gas–solid interface and flow paths. This work develops a reliable LB model to study $\text {CO}_2$ desublimation, which can facilitate applications of CCC for mitigating climate change.

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“…2021; Zhao et al. 2022). There is a consensus among researchers that the growing anthropogenic emissions are mainly to blame (Farcas & Woods 2009; Mac Dowell et al.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

et al. 2023

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“…The concerns about energy shortages and environmental problems have led people to seek renewable energy sources. 1 Among the renewable energy sources, biomass is considered a possible clean energy alternative to fossil fuels due to its high availability and abundant resources. 2 As one of the biomass resources, microalgae have many advantages over lignocellulosic biomass.…”

Section: Introductionmentioning

confidence: 99%

Cascaded Catalytic Copyrolysis of Microalgae and LDPE with Ni/Biochar and HZSM-5 for Improving High-Grade Bio-Oil Production

Liu,

Zhou,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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The N and O elements of microalgae are mainly responsible for the low quality of the bio-oil, and it is difficult to completely remove the heteroatomic compounds by any single catalyst. In this study, the tandem catalysts of Ni/biochar and HZSM-5 were used for the catalytic copyrolysis of microalgae and low-density polyethylene (LDPE). The tandem catalysts improved the product yield and conversion rate compared to Ni/biochar or HZSM-5 alone. Higher addition of LDPE also favored feedstock conversion. During the cascaded catalytic pyrolysis, up to 100% of C 5 −C 12 hydrocarbons, including 48.6% for BTX, were obtained. The selectivity of C 5 −C 12 hydrocarbons was increased by 45.2% due to the synergistic effect of the two catalysts. The copyrolysis process improved the production of C 5 −C 12 hydrocarbons with the highest synergistic degree of 83.1% and resulted in the complete removal of N and O. The plausible pathway for the formation of aromatics and short-chain hydrocarbons was elucidated based on the synergistic effects.

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“…The study of waste-to-energy technology is particularly important because it transforms waste into a green alternative equal to fossil energy and reduces the consumption of the Earth's non-renewable resources [7,8]. International research on waste-to-energy technology for plastics is gradually being improved [9]. Jeong et al [10] used a two-stage gasification process to gasify waste polyethylene pellets; their experimental results showed that the addition of an activated carbon catalyst could increase the yield of gas and reduce the yield of tar.…”

Section: Introductionmentioning

confidence: 99%

Which Is More Environmentally Friendly? A Comparative Analysis of the Environmental Benefits of Two Waste-to-Energy Technologies for Plastics Based on an LCA Model

Zhao

Ren²,

Wen-fang

2023

Sustainability

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Waste plastics are low-value waste; thus, achieving high-value recycling is the most desirable goal. Scientific methods are required to evaluate the environmental benefits and support the technology optimization and market selection of waste-to-energy technology for plastics. This study selected catalytic cracking and incineration power generation of two typical examples of waste plastics energy technologies as the research objects, established a full life cycle assessment model, and used the mid-point method to analyze and compare the environmental benefits of the two technologies. The results showed that catalytic cracking technology is more environmentally friendly. The sensitivity analysis showed that the treatment units had a high impact on the results; process optimization predicted the efficiency of technology optimization and advocated future technological developments to explore the direction of using clean energy, upgrading equipment, and updating catalysts. The results of this study can provide ideas for the optimization of two kinds of waste plastics energy technology. In addition, the comparative data analysis intuitively demonstrated the advantages and disadvantages of waste-to-energy technologies and provided a practical path for the future development of high-value treatments for waste plastics.

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Is pyrolysis technology an advisable choice for municipal solid waste treatment from a low carbon perspective?

Cited by 23 publications

References 24 publications

Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

Cascaded Catalytic Copyrolysis of Microalgae and LDPE with Ni/Biochar and HZSM-5 for Improving High-Grade Bio-Oil Production

Which Is More Environmentally Friendly? A Comparative Analysis of the Environmental Benefits of Two Waste-to-Energy Technologies for Plastics Based on an LCA Model

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Is pyrolysis technology an advisable choice for municipal solid waste treatment from a low carbon perspective?

Cited by 23 publications

References 24 publications

Study of CO2 desublimation during cryogenic carbon capture using the lattice Boltzmann method

Study of CO2 desublimation during cryogenic carbon capture using the lattice Boltzmann method

Cascaded Catalytic Copyrolysis of Microalgae and LDPE with Ni/Biochar and HZSM-5 for Improving High-Grade Bio-Oil Production

Which Is More Environmentally Friendly? A Comparative Analysis of the Environmental Benefits of Two Waste-to-Energy Technologies for Plastics Based on an LCA Model

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Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method

Study of CO₂ desublimation during cryogenic carbon capture using the lattice Boltzmann method