Waste polyethylene terephthalate (PET) plastics-derived activated carbon for CO2 capture: a route to a closed carbon loop

2020 ◽  
Vol 22 (20) ◽  
pp. 6836-6845
Author(s):  
Junyao Wang ◽  
Xiangzhou Yuan ◽  
Shuai Deng ◽  
Xuelan Zeng ◽  
Zhi Yu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Polyethylene Terephthalate ◽  
Co2 Capture ◽  
Comprehensive Investigation ◽  
Temperature Swing ◽  
Waste Polyethylene

This study assessed waste PET-derived activated carbon coupled with temperature swing CO2 adsorption to provide a comprehensive investigation on the potential life cycle environmental impacts.

Valorization of waste polyethylene terephthalate plastic into N-doped microporous carbon for CO2 capture through a one-pot synthesis

2020 ◽  
Vol 399 ◽  
pp. 123010 ◽  
Author(s):  
Xiangzhou Yuan ◽  
Shuangjun Li ◽  
Sunbin Jeon ◽  
Shuai Deng ◽  
Li Zhao ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Co2 Capture ◽  
Microporous Carbon ◽  
One Pot ◽  
One Pot Synthesis ◽  
Waste Polyethylene

scholarly journals Quantifying Environmental and Economic Impacts of Highly Porous Activated Carbon from Lignocellulosic Biomass for High-Performance Supercapacitors

Energies ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 351
Author(s):  
Yuxi Wang ◽  
Jingxin Wang ◽  
Xufeng Zhang ◽  
Debangsu Bhattacharyya ◽  
Edward M. Sabolsky
Keyword(s):  
Activated Carbon ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Lignocellulosic Biomass ◽  
Activated Carbons ◽  
Economic Impacts ◽  
Economic Feasibility ◽  
Plant Production ◽  
Base Case ◽  
Selling Price

Activated carbons (AC) from lignocellulosic biomass feedstocks are used in a broad range of applications, especially for electrochemical devices such as supercapacitor electrodes. Limited studies of environmental and economic impacts for AC supercapacitor production have been conducted. Thus, this paper evaluated the environmental and economic impacts of AC produced from lignocellulosic biomass for energy-storage purposes. The life cycle assessment (LCA) was employed to quantify the potential environmental impacts associated with AC production via the proposed processes including feedstock establishment, harvest, transport, storage, and in-plant production. A techno-economic model was constructed to analyze the economic feasibility of AC production, which included the processes in the proposed technology, as well as the required facility installation and management. A base case, together with two alternative scenarios of KOH-reuse and steam processes for carbon activation, were evaluated for both environmental and economic impacts, while the uncertainty of the net present value (NPV) of the AC production was examined with seven economic indicators. Our results indicated that overall “in-plant production” process presented the highest environmental impacts. Normalized results of the life-cycle impact assessment showed that the AC production had environmental impacts mainly on the carcinogenics, ecotoxicity, and non-carcinogenics categories. We then further focused on life cycle analysis from raw biomass delivery to plant gate, the results showed that “feedstock establishment” had the most significant environmental impact, ranging from 50.3% to 85.2%. For an activated carbon plant producing 3000 kg AC per day in the base case, the capital cost would be USD 6.66 million, and annual operation cost was found to be USD 15.46 million. The required selling price (RSP) of AC was USD 16.79 per kg, with the discounted payback period (DPB) of 9.98 years. Alternative cases of KOH-reuse and steam processes had GHG emissions of 15.4 kg CO2 eq and 10.2 kg CO2 eq for every 1 kg of activated carbon, respectively. Monte Carlo simulation showed 49.96% of the probability for an investment to be profitable in activated carbon production from lignocellulosic biomass for supercapacitor electrodes.

scholarly journals A Comparative Life Cycle Assessment of Meat Trays Made of Various Packaging Materials

2019 ◽  
Vol 11 (19) ◽  
pp. 5324 ◽  
Author(s):  
Daniel Maga ◽  
Markus Hiebel ◽  
Venkat Aryan
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
End Of Life ◽  
Environmental Impacts ◽  
Polyethylene Terephthalate ◽  
Environmental Assessment ◽  
Life Stage ◽  
Resource Depletion ◽  
Assessment Method ◽  
Ethylene Vinyl Alcohol

In light of the debate on the circular economy, the EU strategy for plastics, and several national regulations, such as the German Packaging Act, polymeric foam materials as well as hybrid packaging (multilayered plastic) are now in focus. To understand the environmental impacts of various tray solutions for meat packaging, a comparative environmental assessment was conducted. As an environmental assessment method, a life cycle assessment (LCA) was applied following the ISO standards 14040/44. The nine packaging solutions investigated were: PS-based trays (extruded polystyrene and extruded polystyrene with five-layered structure containing ethylene vinyl alcohol), PET-based trays (recycled polyethylene terephthalate, with and without polyethylene layer, and amorphous polyethylene terephthalate), polypropylene (PP) and polylactic acid (PLA). The scope of the LCA study included the production of the tray and the end-of-life stage. The production of meat, the filling of the tray with meat and the tray sealing were not taken into account. The results show that the PS-based trays, especially the mono material solutions made of extruded polystyrene (XPS), show the lowest environmental impact across all 12 impact categories except for resource depletion. Multilayer products exhibit higher environmental impacts. The LCA also shows that the end-of-life stage has an important influence on the environmental performance of trays. However, the production of the trays dominates the overall results. Furthermore, the sensitivity analysis illustrates that, even if higher recycling rates were realised in the future, XPS based solutions would still outperform the rest from an environmental perspective.

scholarly journals Sustainability-inspired upcycling of waste polyethylene terephthalate plastic into porous carbon for CO2 capture

2022 ◽  
Author(s):  
Xiangzhou Yuan ◽  
Nallapaneni Manoj Kumar ◽  
Boris Brigljević ◽  
Shuangjun Li ◽  
Shuai Deng ◽  
...  
Keyword(s):  
Waste Management ◽  
Polyethylene Terephthalate ◽  
Co2 Capture ◽  
Porous Carbon ◽  
Plastic Waste ◽  
Industrial Scale ◽  
Waste Polyethylene

Industrial-scale upcycling of waste polyethylene terephthalate (PET) plastic into porous carbon globally for CO2 capture was verified as a multifunctional alternative to conventional CO2 absorption and plastic waste management technologies.

scholarly journals Environmental sustainability of cellulose-supported solid ionic liquids for CO2 capture

2019 ◽  
Vol 21 (15) ◽  
pp. 4100-4114 ◽  
Author(s):  
Pelayo García-Gutiérrez ◽  
Rosa M. Cuéllar-Franca ◽  
Dan Reed ◽  
George Dowson ◽  
Peter Styring ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Co2 Capture ◽  
Environmental Sustainability

The life cycle environmental impacts of cellulose-supported solid ionic liquids are estimated in comparison with a range of other CO2 sorbents.

scholarly journals Kinetics and Thermodynamic Modeling for CO2 Capture Using NiO Supported Activated Carbon by Temperature Swing Adsorption

2021 ◽  
Vol 12 (3) ◽  
pp. 4200-4219
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Co2 Capture ◽  
Active Sites ◽  
Basic Site ◽  
Order Kinetic ◽  
Solid Sorbent ◽  
Temperature Swing ◽  
Temperature Swing Adsorption

Solid sorbent from functionalized activated carbon (AC) could enhance the adsorption capacity in CO2 capture. This study emphasizes cyclic CO2 capture using NiO functionalized AC. Different loadings of NiO impregnated on AC were synthesized. This work showed that the most efficient adsorbent of 0.05NiO/AC exhibits an adsorption capacity of 55.464 mg/g at the adsorption temperature of 30 °C by using the temperature swing adsorption method. A slight loss of adsorption capacity at 0.28 % for a five cycles CO2 capture indicated consistency potential for large scales application. The adsorbent exhibited a slightly lower surface area compared to AC, but the presence of NiO improved the adsorption capacity by chemisorption phenomena. The NiO acts as the basic site for CO2 capture. Meanwhile, AC as support could increase the surface area of active sites and reduce the sintering effect of the NiO. It was found that various adsorption temperatures had a good correlation with the pseudo-second-order kinetic model. The magnitude of the sorption process was evaluated by the activation energy of 48.09 kJ/mol, which implies a chemisorption process at various adsorption temperatures. Thermodynamic studies explained the CO2 adsorption process for this study was found to be a spontaneous and endothermic process.

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