An Adiabatic-Expansion-Induced Perturbation Study on Gas–Aerosol Partitioning in Ambient Air—Formation of NH4NO3 and Microdroplet Nitrogen Fixation (2)

Atmosphere, Год журнала: 2025, Номер 16(5), С. 544 - 544

Опубликована: Май 5, 2025

Recent observations have increasingly challenged the conventional understanding of atmospheric NH3 and its potential sources in remote environments. Laboratory studies suggest that microdroplet redox generation could offer an alternative explanation. However, key questions remain: (1) Can occur ambient air? (2) Is it restricted by presence specific catalysts? (3) What factors determine efficiency via reactions? We investigate these based on adiabatic-expansion-induced perturbation performed various atmospheres over last decade. Our results indicate + HNO3 at ultrafast formation rates, with campaign-dependent stable stoichiometric ratios to NH3, as well highly variable occurrence frequencies efficiencies. These findings reactions are more likely responsible for than chemistry. Moreover, our analysis suggests line speed microdroplets may be one determining occurrence, ratio reaction. Additionally, sea salt aerosols low temperature, rather catalysts, significantly influence processes. current observational data do not allow us derive a functional relationship between reaction rate parameters, nor fully detail underlying Comprehensive controlled laboratory experiments, similar but utilizing state-of-the-art sensitive analyzers, would necessary, though such experiments beyond capabilities.

Язык: Английский

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Near-infrared Real-Time trace NH3 sensor based on WM-OA-ICOS and EEMD Assisted optical denoising

Measurement, Год журнала: 2025, Номер unknown, С. 116658 - 116658

Опубликована: Янв. 1, 2025

Язык: Английский

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NH₃ Uptake and NH₃/CO₂ Separation by a [MEA][SCN]-Based Deep Eutectic Solvent: Experimental Investigation and Process Simulation

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

NH3 has attracted increasing attention as a fundamental material and promising hydrogen carrier. The uptake of from NH3-containing exhausted gas presents economic environmental issues. In this study, [MEA][SCN] was paired with glycerol, acetamide, formamide, phenol (PhOH), ethylene glycol, urea, glycerolformal, or 1,3-dimethyl-2-imidazolidinone to construct deep eutectic solvents (DESs) for effective absorption NH3/CO2 separation investigation. All the [MEA][SCN]-based DESs exhibited good performance. Notably, [MEA][SCN]-PhOH (1:1) realized an atmospheric capacity 0.2459 g NH3·g–1 DES selectivity 194.53 at 303.15 K. Based on experimental data, new process recovery melamine tail using (DES-M) developed simulated operational parameters optimization, heat exchange network design, evaluation. DES-M can recycle purity 99.6% save 82.01% utility costs compared water scrubbing method. integration design in reduces 66.94% low-pressure steam 9.00% costs. Specially, optimized exceed 59% after-tax rate return renewable energy.

Язык: Английский

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Towards precise nitrogen fertilizer management for sustainable agriculture

Deleted Journal, Год журнала: 2025, Номер unknown, С. 100026 - 100026

Опубликована: Фев. 1, 2025

Язык: Английский

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Responses of atmospheric inorganic nitrogen deposition to emissions in a polluted region of southern China

Atmospheric Research, Год журнала: 2025, Номер unknown, С. 108026 - 108026

Опубликована: Март 1, 2025

Язык: Английский

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Ammonium and nitrate in ice accretions and snow at two Central European montane locations: δ15N and δ18OH2O isotope ratios, fluxes and sources

The Science of The Total Environment, Год журнала: 2024, Номер 959, С. 178203 - 178203

Опубликована: Дек. 24, 2024

Язык: Английский

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Estimation of Ammonia Emission Inventory Using Life Cycle Assessment Based on Livestock Manure Flow: A Case Study of the Manure Management Sector in Korea

Atmosphere, Год журнала: 2024, Номер 15(8), С. 910 - 910

Опубликована: Июль 30, 2024

Ammonia is one of the precursor gases in formation particulate matter (PM) that reacts with nitrogen oxides and sulfur atmosphere. Based on Clean Air Policy Support System (CAPSS) Korea, annual ammonia emissions amounted to 261,207 tons 2020 agricultural source (manure management sector) contributes highest proportion inventory. However, methodology for study Korea has some limitations regarding representativeness sites selected reliability measurement method. In this study, we aimed recalculate from livestock industry using UK’s estimation method, which uses life cycle assessment manure. Three major animal types, i.e., cattle (beef dairy cows), pigs chickens, three processes based manure flow, housing, storage treatment land application processes, were considered. The total estimated be approximately 33% higher than official stated by CAPSS. For processes. cow poultry much those CAPSS, while beef pig showed similar levels. used can offer an alternative approach emission sector agriculture Korea. Korean factors flow should developed applied future.

Язык: Английский

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Zeolite and Sulfuric Acid Mixture Reduces the Ammonia and Greenhouse Gas During Manure Composting and Utilize as Fertilizer on Maize Cropping

Han-guk choji josaryo hakoeji, Год журнала: 2024, Номер 44(4), С. 294 - 300

Опубликована: Дек. 30, 2024

Язык: Английский

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