Dalton Transactions, Год журнала: 2023, Номер 52(23), С. 7975 - 7981
Опубликована: Янв. 1, 2023
The efficient separation of CO 2 from CH 4 and N is essential for the upgrading biogas reducing carbon emissions in flue gas, but challenging energy industry.
Язык: Английский
Next Energy, Год журнала: 2025, Номер 7, С. 100242 - 100242
Опубликована: Янв. 22, 2025
Язык: Английский
Процитировано
0
AIP conference proceedings, Год журнала: 2025, Номер 3266, С. 020001 - 020001
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Chemical Engineering Science, Год журнала: 2025, Номер unknown, С. 121371 - 121371
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
0
Environments, Год журнала: 2025, Номер 12(4), С. 106 - 106
Опубликована: Март 31, 2025
Renewable natural gas derived from biogas presents a viable pathway for decarbonizing systems. Wastewater treatment plants equipped with anaerobic digesters often flare or utilize heat and electricity generation, missing the potential of renewable gas. This study investigates techno-economic feasibility emission impact system at small wastewater plant in Southwestern United States. Due to lack existing data on composition contaminants originating within States, samples were tested seasonally year, components are reported this analysis. Using hourly production data, analysis incorporates costs fuel credits 2022 market prices cost remove contaminants. The results show 15-year net present value USD 16.3 million, payback period three years, surpassing economic performance combined power systems previously assessed same facility. Additionally, achieve 22% reduction site emissions compared These findings highlight as profitable environmentally superior alternative utilization small-scale plants, contingent access credits.
Язык: Английский
Процитировано
0
Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162720 - 162720
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Journal of Materials Science, Год журнала: 2025, Номер unknown
Опубликована: Апрель 18, 2025
Язык: Английский
Процитировано
0
Journal of Chemical Technology & Biotechnology, Год журнала: 2025, Номер unknown
Опубликована: Апрель 23, 2025
Abstract BACKGROUND Dual‐reflux pressure swing adsorption (DR‐PSA) is an advanced variant of conventional PSA systems, capable simultaneously producing two high‐purity products with high recovery. However, inherent trade‐offs among purity, productivity, and cycle work necessitate multi‐objective optimization (MOO) to balance performance. This study investigates the MOO DR‐PSA process for biogas upgrading using artificial neural networks (ANNs) as surrogate models. Single‐hidden‐layer ANNs were developed various structures training algorithms integrated into non‐dominated sorting genetic algorithm‐II solve problems. RESULTS Different performance metrics require distinct ANN architectures algorithms, indicating no universal model selection. The Adam‐ selu‐ 446 CH 4 purity in light product (LP) relu ‐398 work, both on a large dataset, exhibited accuracy, 0.9975 0.9959, respectively. Meanwhile, elu ‐212 bed small achieved 0.9988. Pareto front maximizing LP productivity revealed sharp knee region, significant trade‐off. Under constrained fronts emerged at different levels (>91% 91.5%), fewer feasible solutions higher purity. Ultimately, optimized conditions resulted enhancement by least 17%, reduction much 34%, 30%, compared base case. CONCLUSION ANN‐assisted optimizes performance, offering insights development, mapping, identification operational regions. © 2025 Society Chemical Industry (SCI).
Язык: Английский
Процитировано
0
Energy, Год журнала: 2023, Номер 288, С. 129853 - 129853
Опубликована: Дек. 9, 2023
Язык: Английский
Процитировано
9
Fuel Processing Technology, Год журнала: 2024, Номер 256, С. 108065 - 108065
Опубликована: Март 1, 2024
A laboratory-scale fixed-bed column is employed to study the dynamic behavior of carbon molecular sieve MSC CT-350 for CO2/CH4 separation. Breakthrough adsorption tests in single-component systems are carried out at different pressures (1, 3, 5, 6.5 and 8 bar) constant temperature (20 °C). Moreover, an additional test conducted with a 40% CO2/60% CH4 binary mixture 3 bar. Desorption performed by varying purge-to-feed ratio (P/F) 50%, 30% 20%, optionally using vacuum pump. Experimental results show that has good CO2 capacity each pressure, considerably higher than CH4. In test, very slight differences experimentally found kinetics equilibrium respect single-compound tests, which equal 2.16 mol kg−1 0.302 bar, compared 2.29 0.262 single-compoound counterparts. The time required complete regeneration decreases increase purge flowrate simultaneous use Finally, reversible process as adsorbent not significantly reduced when utilized subsequent adsorption-desorption cycles.
Язык: Английский
Процитировано
3
Energies, Год журнала: 2024, Номер 17(14), С. 3503 - 3503
Опубликована: Июль 17, 2024
The Lunnan oilfield, nestled within the Tarim Basin, represents a prototypical extra-low-permeability sandstone reservoir, distinguished by high-quality crude oil characterised low viscosity, density, and gel content. effective exploitation of such reservoirs hinges on implementation carbon dioxide (CO2) flooding techniques. This study, focusing Lunnan, delves into mechanisms CO2-assisted displacement under diverse operational parameters: injection pressures, CO2 concentration levels, variations in properties. It integrates analyses high-pressure, high-temperature behaviour CO2, dynamics expansion, prolonged core flood characteristics, governing principles minimum miscible pressure transitions. findings reveal nuanced interplay between variables: CO2’s density viscosity initially surge with escalating pressures before stabilising, whereas they experience gradual decline increasing temperature. Enhanced correlates heightened expansion coefficient, yet increment degassed remains marginal. Notably, undergoes substantial reduction stratigraphic pressures. sequential application water alternating gas (WAG) followed continuous attains recovery efficiency surpassing 90%, emphasising superiority uninterrupted over processes lacking profiling. presence non-miscible hydrocarbon gases segmented plug drives impedes efficiency, underscoring importance purity medium. Furthermore, marked trend emerges rates as replacement escalates, exhibiting an initial rapid enhancement succeeded rise. Collectively, these insights offer robust theoretical foundation endorsing deployment strategies for enhancing from reservoirs, thereby contributing valuable data to advancement enhanced (EOR) technologies challenging, low-permeability environments.
Язык: Английский
Процитировано
3