Results 61 to 70 of about 143,384 (357)

Unraveling Alkali Ion Electron Donation for Enhancing Heterogeneous Catalytic Oxidation

Advanced Science, EarlyView.
A new mechanistic pathway for potassium (K) ions as electron donors is identified by constructing single K ion chains confined within hexagonal WO3 tunnels. The as‐produced high‐electron‐density Kδ+ (0<δ<1) ions not only facilitate the formation of oxygen vacancies that behave classical electronic effect but, more importantly, also directly donate ...
Jin Wang, Zhenghui Zhang, Xianqiu Song, Rong Wang, Ying Xin, Yexin Zhang, Zhaoliang Zhang   +6 more
wiley   +1 more source

Effect of Diesel Soot on the Heterogeneous Reaction of NO₂ on the Surface of γ-Al₂O₃

Atmosphere, 2022
Soot and aged soot are often found to be mixed with atmospheric particles, which inevitably affect various atmospheric heterogeneous reactions and secondary aerosol formation.
Chao Wang, Lingdong Kong, Shengyan Jin, Lianghai Xia, Jie Tan, Yuwen Wang   +5 more
doaj   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Morphology of diesel soot residuals from supercooled water droplets and ice crystals: implications for optical properties

Environmental Research Letters, 2015
Freshly emitted soot particles are fractal-like aggregates, but atmospheric processes often transform their morphology. Morphology of soot particles plays an important role in determining their optical properties, life cycle and hence their effect on ...
Swarup China, Gourihar Kulkarni, Barbara V Scarnato, Noopur Sharma, Mikhail Pekour, John E Shilling, Jacqueline Wilson, Alla Zelenyuk, Duli Chand, Shang Liu, Allison C Aiken, Manvendra Dubey, Alexander Laskin, Rahul A Zaveri, Claudio Mazzoleni   +14 more
doaj   +1 more source

Individual aerosol particles from biomass burning in southern Africa: 1. Compositions and size distributions of carbonaceous particles [PDF]

, 2003
Individual aerosol particles in smoke plumes from biomass fires and in regional hazes in southern Africa were studied using analytical transmission electron microscopy ( TEM), which allowed detailed characterization of carbonaceous particle types in ...
Andreae, Andreae, Andreae, Artaxo, Buseck, Buseck, Cachier, Cachier, Cliff, Crutzen, Ebert, Echalar, Fuller, Gao, Gaudichet, Haywood, Hobbs, Hobbs, Hobbs, Ikegami, Jacobson, Jury, Katrinak, Katrinak, Li, Li, Liousse, Liu, Moore, Okada, Okada, Penner, Pósfai, Pósfai, Pósfai, Pósfai, Reid, Reiner, Roessler, Sheridan, Sinha, Turn, Yokelson   +42 more
core   +1 more source

Determination of the Soot Mass by Conductometric Soot Sensors

Procedia Engineering, 2014
AbstractSoot sensors are required for on-board diagnostics (OBD) of automotive diesel particulate filters (DPF) to detect filter failures. If installed upstream of a DPF, the “engine-out” soot emissions can be determined by conductometric soot sensors.
Hagen, G., Müller, A., Feulner, M., Schott, A., Zöllner, C., Brüggemann, D., Moos, R.   +6 more
openaire   +1 more source

Hydrogen‐Enriched Microbial Oil Biodiesel With Hybrid Nanoparticles Impact on Diesel Engine Efficiency and Emissions

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study examines a dual‐fuel enhancement strategy that combines hydrogen enrichment with hybrid nanoparticle (HNP) doping. The aim is to improve combustion, performance, and emission characteristics of microbial oil biodiesel (MOB) in compression ignition engines.
D. Premkumar, S. Senthil Kumar, K. R. Padmavathi, Prajith Prabakar   +3 more
wiley   +1 more source

Effect of H2/CO addition on soot formation in ethylene diffusion flame

Frontiers in Energy Research
Coupling the San Diego gas phase reaction mechanism and the Moss Brookes soot model using FLUENT14.0 software, the effect of adding H2/CO on the fuel side on soot formation in an ethylene/air laminar diffusion flame was studied.
Yindi Zhang, Yindi Zhang, Yijing Xue, Zichun Xu, Fanjin Zeng, Yue Xin, Qinghai Chen, Shadrack Adjei Takyi   +7 more
doaj   +1 more source

Implementation of the Semi Empirical Kinetic Soot Model within Chemistry Tabulation Framework for Efficient Emissions Predictions in Diesel Engines [PDF]

, 2019
Soot prediction for diesel engines is a very important aspect of internal combustion engine emissions research, especially nowadays with very strict emission norms. Computational Fluid Dynamics (CFD) is often used in this research and optimisation of CFD
Gavaises, M., Goryntsev, D., Priesching, P., Starikov, A., Tap, F. A., Tvrdojevic, M., Vujanovic, M.   +6 more
core   +1 more source

Hybrid Flexible Dry Electrodes for Electroencephalography: Electrical and Thermo‐Mechanical Properties

Journal of Applied Polymer Science, EarlyView.
Visual summary illustrating the fabrication pathway of SEBS‐based hybrid CNT/CB nanocomposites, the molding of multipin flexible electrodes, and their evaluation through electrical characterization and EEG signal acquisition. ABSTRACT This study evaluates styrene–ethylene–butylene–styrene (SEBS) composites modified with carbon nanotubes (CNTs) and ...
George Gnonhoue, Éric David, Jérémie Voix, Ilyass Tabiai   +3 more
wiley   +1 more source