Results 11 to 20 of about 84,625 (302)

Machine learning techniques to increase the performance of indirect methane quantification from a single, stationary sensorSynopsis

Heliyon, 2022
Researchers are searching for ways to better quantify methane emissions from natural gas infrastructure. Current indirect quantification techniques (IQTs) allow for more frequent or continuous measurements with fewer personnel resources than direct ...
Robert S. Heltzel, Derek R. Johnson, Mohammed T. Zaki, Aron K. Gebreslase, Omar I. Abdul-Aziz   +4 more
doaj   +1 more source

Investigating cylinder deactivation as a low fuel-penalty thermal management strategy for heavy-duty diesel engines

Frontiers in Mechanical Engineering, 2022
The upcoming ultra-low-NOx (oxides of nitrogen) emissions standard and in-use NOx emissions requirement requires engine manufacturers to further reduce tailpipe NOx emissions by over 90% from the current United States Environmental Protection Agency 2010
Christian Hushion, Arvind Thiruvengadam, Rasik Pondicherry, Gregory Thompson, Justin Baltrucki, Robb Janak, Justin Lee, Lisa Farrell   +7 more
doaj   +1 more source

Application of Buoyancy Support System to Secure Residual Buoyancy of Damaged Ships

Journal of Marine Science and Engineering, 2023
SOLAS (Safety of Life at Sea), which was first enacted in 1914 as a result of the Titanic disaster, presents mandatory requirements for ship safety, such as the adoption of watertight bulkheads.
Gyeong Joong Lee, Jang-Pyo Hong, Kwang Keun Lee, Hee Jin Kang   +3 more
doaj   +1 more source

Hydrocracking of a Heavy Vacuum Gas Oil with Fischer–Tropsch Wax

Energies, 2020
Catalytic hydrocracking represents an optimal process for both heavy petroleum fractions and Fischer–Tropsch (FT) wax upgrading because it offers high flexibility regarding the feedstock, reaction conditions and products’ quality.
Olga Pleyer, Dan Vrtiška, Petr Straka, Aleš Vráblík, Jan Jenčík, Pavel Šimáček   +5 more
doaj   +1 more source

Co-Torrefaction Progress of Biomass Residue/Waste Obtained for High-Value Bio-Solid Products

Energies, 2022
The co-torrefaction of several biomasses may be a viable solution in the study area, as it produces biofuels and addresses waste-treatment concerns. This review evaluates biomass through ultimate, proximate, and FTIR analyses, and the mechanism of the co-
Abdul Waheed, Salman Raza Naqvi, Imtiaz Ali   +2 more
doaj   +1 more source

Bimetallic Ni-Based Catalysts for CO₂ Methanation: A Review

Nanomaterials, 2020
CO2 methanation has recently emerged as a process that targets the reduction in anthropogenic CO2 emissions, via the conversion of CO2 captured from point and mobile sources, as well as H2 produced from renewables into CH4. Ni, among the early transition
Anastasios I. Tsiotsias, Nikolaos D. Charisiou, Ioannis V. Yentekakis, Maria A. Goula   +3 more
doaj   +1 more source

Selective Catalytic Reduction of NO_x over Perovskite-Based Catalysts Using C_xH_y(O_z), H₂ and CO as Reducing Agents—A Review of the Latest Developments

Nanomaterials, 2022
Selective catalytic reduction (SCR) is probably the most widespread process for limiting NOx emissions under lean conditions (O2 excess) and, in addition to the currently used NH3 or urea as a reducing agent, many other alternative reductants could be ...
Ioannis V. Yentekakis, Amvrosios G. Georgiadis, Catherine Drosou, Nikolaos D. Charisiou, Maria A. Goula   +4 more
doaj   +1 more source

Mixed Effects Random Forest Model for Maintenance Cost Estimation in Heavy-Duty Vehicles Using Diesel and Alternative Fuels

IEEE Access, 2023
Maintenance & Repair costs in heavy-duty trucks are an important component of the total cost of ownership. Due to the very limited availability of real-time data collected from medium- and heavy-duty vehicles using alternative fuels, this topic ...
Sasanka Katreddi, Arvind Thiruvengadam, Gregory J. Thompson, Natalia A. Schmid   +3 more
doaj   +1 more source

Effects of Process Parameters on Hydrolytic Treatment of Black Liquor for the Production of Low-Molecular-Weight Depolymerized Kraft Lignin

Molecules, 2018
The present research work aimed at hydrolytic treatment of kraft black liquor (KBL) at 200–300 °C for the production of low-molecular-weight depolymerized kraft lignin (DKL).
Zaid Ahmad, Nubla Mahmood, Zhongshun Yuan, Michael Paleologou, Chunbao (Charles) Xu   +4 more
doaj   +1 more source

Sustainable Process for the Depolymerization/Oxidation of Softwood and Hardwood Kraft Lignins Using Hydrogen Peroxide under Ambient Conditions

Molecules, 2020
The present study demonstrated a sustainable and cost-effective approach to depolymerize/oxidize softwood (SW) and hardwood (HW) kraft lignins using concentrated hydrogen peroxide at temperatures ranging from 25 to 35 °C, in the absence of catalysts or ...
Zaid Ahmad, Waleed Wafa Al Dajani, Michael Paleologou, Chunbao (Charles) Xu   +3 more
doaj   +1 more source