Results 181 to 190 of about 617,338 (368)

Hydrogen sulfide in underground hydrogen storage sites: Implication of thermochemical sulfate reduction

open access: yesDeep Underground Science and Engineering, EarlyView.
A one‐dimensional diffusion‐based mass transport model was built using PHREEQC to highlight the potential challenges posed by thermochemical sulfate reduction (TSR) in depleted gas fields. The results obtained indicated that the presence of iron minerals (pyrite and hematite) is crucial for H2S generation through TSR reactions.
Sadegh Ahmadpour, Raoof Gholami
wiley   +1 more source

Summary report of Committee B [PDF]

open access: yes, 1977
Topics discussed in this summary include: (1) general aviation and services; (2) aircraft design; and (3) simulation. It was concluded that private pilots need to be more knowledgeable about weather.
Lenschow, D. H.
core   +1 more source

Following the in situ pathway of photo‐activated cyclopentadienone‐NHC iron complexes as ammonia‐borane dehydrocoupling bifunctional catalysts

open access: yesEuropean Journal of Inorganic Chemistry, Accepted Article.
Carbonyl iron complexes bearing cyclopentadienone/hydroxycyclopentadienyl ligands and N‐heterocyclic carbene as non‐innocent and ancillary ligands, are active as ammonia‐borane dehydrocoupling catalysts under photo‐activation conditions. Dehydrogenation occurs at room temperature and is complete (in NMR tube) after 2h with 10 mol% of cationic complex 2,
Rita Mazzoni   +10 more
wiley   +1 more source

Analysis of general aviation single-pilot IFR incident data obtained from the NASA aviation safety reporting system [PDF]

open access: yes
Data obtained from the NASA Aviation Safety Reporting System (ASRS) data base were used to determine problems in general aviation single pilot IFR operations.
Bergeron, H. P.
core   +1 more source

Novel Atmospherically Plasma Sprayed Micro Porous Layer for Anion Exchange Membrane Water Electrolysis Operating With Supporting Electrolyte

open access: yesElectrochemical Science Advances, EarlyView.
ABSTRACT Anion exchange membrane water electrolysis (AEMWE) is one of the most promising candidates for green hydrogen production needed for the de‐fossilization of the global economy. As AEMWE can operate at high efficiency without expensive Platinum Group Metal (PGM) catalysts or titanium cell components, required in state‐of‐the‐art proton exchange ...
Vincent Wilke   +17 more
wiley   +1 more source

A Structured Framework for Predicting Sustainable Aviation Fuel Properties using Liquid-Phase FTIR and Machine Learning [PDF]

open access: yesarXiv
Sustainable aviation fuels have the potential for reducing emissions and environmental impact. To help identify viable sustainable aviation fuels and accelerate research, several machine learning models have been developed to predict relevant physiochemical properties.
arxiv  

The Sky is the Limit? The Determinants and Constraints of European Airports' Commercial Revenues [PDF]

open access: yes
This study investigates the determinants of commercial and retail airport revenues as well as revenues from real estate operations. Cross-sectional OLS, 2SLS and robust regression models of European airports identify a number of significant drivers of ...
Franz Fuerst, Sven Gross, Ulf Klose
core  

Integrated Strategies Toward the Capture and Electrochemical Conversion of Low‐Concentration Carbon Dioxide

open access: yesExploration, EarlyView.
This review mainly covers the recent progress on the integrated technologies of CO2 capture and electrochemical conversion, including the integration strategies, mechanisms, and corresponding issues. The challenges and prospects in terms of the research direction in this field are also provided, with the hope of promoting practical CO2 utilization from
Zhenyi Yang   +5 more
wiley   +1 more source

Sustainable Aviation Fuels: Opportunities, Alternatives and Challenges for Decarbonizing the Aviation Industry and Foster the Renewable Chemicals [PDF]

open access: yesarXiv
Sustainable Aviation Fuels (SAF) are pivotal in the global effort to decarbonize the aviation sector and meet greenhouse gas (GHG) reduction targets established by international frameworks such as CORSIA and Brazil ProBioQAV. This study evaluates SAF potential to reduce lifecycle carbon emissions by up to 80% while being compatible with existing ...
arxiv  

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