Results 1 to 10 of about 415,200 (298)

Methods for determining the emission of greenhouse gases in swine farming [PDF]

open access: yesRevista Brasileira de Engenharia Agrícola e Ambiental, 2022
Swine production systems contribute to emission of greenhouse gases (CO2, N2O, and CH4) and ammonia (NH3) into the atmosphere. Therefore, the objective of this study was to evaluate methods for determining the emissions of ammonia and greenhouse gases ...
Emanuele H. Nunes   +6 more
doaj   +1 more source

STM/STS Study of the Density of States and Contrast Behavior at the Boundary between (7 × 7)N and (8 × 8) Structures in the SiN/Si(111) System

open access: yesCrystals, 2022
The origin of the contrast appearing in STM images at the boundary between diverse ordered structures is studied using the example of two structures, (7 × 7)N and (8 × 8), formed in the system of a two-dimensional silicon nitride layer on the Si(111 ...
Vladimir Mansurov   +5 more
doaj   +1 more source

The analysis of influence of uncertainty factors on mathematical modeling of the process of reverse expansion of ammonia in low-speed reciprocating compressor stage. Part 2 [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2022
The paper presents the analysis of influence of the method of calculating the heat transfer coefficient on mathematical modeling of the process of reverse expansion of ammonia in the working chamber of the reciprocating compressor stage (in the area of
D. Kh. Sadvakasov   +2 more
doaj   +1 more source

Study on NO formation characteristics and ammonia-nitrogen conversion behavior during ammonia-coal co-firing

open access: yes能源环境保护, 2023
Experiments were conducted on a laboratory drop tube furnace for the single-firing of ammonia and coal, as well as co-firing, combined with numerical simulations to investigate the NO formation characteristics, intermediate reaction processes and ammonia-
WANG Huakun   +4 more
doaj   +1 more source

Influence of Structural Parameters of Tesla Valve Flow Field on Performance of Fuel Cells

open access: yesEnergies
The optimization of flow channel structures significantly impacts the performance enhancement of proton exchange membrane fuel cells (PEMFCs). In this paper, the influences of the loop radius, inclination angle, and presence of the island in the Tesla ...
Hui Guo   +6 more
doaj   +1 more source

Toward Reliable FOWT Modeling: A New Calibration Approach for Extreme Environmental Loads

open access: yesEnergies
The current paper presents a comparative analysis between a high-fidelity simulation tool and computational fluid dynamics (CFD) in evaluating the behavior of a fully coupled floating offshore wind turbine (FOWT) system subjected to three distinct design
Ho-Seong Yang   +2 more
doaj   +1 more source

Research on the technical scheme of multi-stack common rail fuel cell engine based on the demand of commercial vehicle

open access: yesEnergy and AI
At present, most fuel cell engines are single-stack systems, and high-power single-stack systems have bottlenecks in meeting the power requirements of heavy-duty trucks, mainly because the increase in the single active area and the excessive number of ...
Ji Pu   +6 more
doaj   +1 more source

Carbon dioxide electrochemical reduction by copper nanoparticles/ionic liquid-based catalytic inks

open access: yesFrontiers in Environmental Chemistry
The development of copper nanoparticle (CuNP)-based catalysts for the electrochemical reduction of carbon dioxide (ECO2-R) offers a promising approach to enhance its transformation into other industrially significant compounds.
Valeria Gazzano   +13 more
doaj   +1 more source

Nitrogen-diluted ammonia SNCR for enhanced NOx removal in a ceramic roller kiln

open access: yesApplications in Energy and Combustion Science
This study investigates the application of nitrogen-diluted ammonia injection in Selective Non-Catalytic Reduction (SNCR) systems to enhance NOx removal efficiency in a high-temperature, oxygen-abundant ceramic roller kiln environment.
Zhihao Yang   +7 more
doaj   +1 more source

Phytic Acid‐Modified Ni3Fe1N With Enhanced Chloride Corrosion Resistance for Efficient and Stable Seawater Oxidation

open access: yesSmall Structures
Developing oxygen evolution reaction (OER) electrodes with high catalytic activity and chloride corrosion resistance is crucial for advancing industrial seawater electrolysis for hydrogen production, yet it remains a significant challenge.
Chuang Tian   +8 more
doaj   +1 more source

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