Results 121 to 130 of about 32,226 (269)

Overview study of Space Power Technologies for the advanced energetics program [PDF]

Space power technologies are reviewed to determine the state-of-the-art and to identify advanced or novel concepts which promise large increases in performance. The potential for incresed performance is judged relative to benchmarks based on technologies
Gross, S., Millner, A., Neugebauer, M., Phillips, W., Powell, J., Schmidt, E., Taussig, R., Wolf, M., Woodcock, G.   +8 more
core   +1 more source

Challenges and Advancements in High‐Nickel Layered Oxides Cathode Material for Lithium‐Ion Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
As a representative high‐energy‐density cathode material for lithium‐ion batteries, NCM811 still encounters critical challenges. This review provides a comprehensive analysis of its failure mechanisms, summarizes recent modification strategies, and highlights the contributions of advanced characterization and simulation techniques to performance ...
Yunshan Zheng, Junfeng Li, Yijing Liu, Lanlan Feng, Wen Liu, LiLi Lin, Yiming Wang, Haoyang Peng, Jian Lu, Dong Zhou, Baohua Li   +10 more
wiley   +1 more source

Synthesis of Carbon Nanotubes From CO2 Enabled by Fe–Mo Bimetallic Catalysts via Effective CO2 Scavenging

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The tandem process involves CO2 methanation and CH4 pyrolysis for CNT synthesis. Unreacted CO2 and H2 from methanation oxidize Fe, suppressing CNT growth on Fe‐only catalysts. Incorporation of Mo into Fe/MgO forms Mo2C, which prevents Fe oxidation under CO2/H2 conditions and thereby enables CNT formation.
Eunchae Oh, Jaewon Jang, Yoon Kyeung Lee, Junghoon Yang, Byung‐Joo Kim, Jungpil Kim   +5 more
wiley   +1 more source

Solar photochemical process engineering for production of fuels and chemicals [PDF]

The engineering costs and performance of a nominal 25,000 scmd (883,000 scfd) photochemical plant to produce dihydrogen from water were studied. Two systems were considered, one based on flat-plate collector/reactors and the other on linear parabolic ...
Biddle, J. R., Fujita, T., Peterson, D. B.   +2 more
core   +1 more source

Energy Storage System in Microgrids: Challenges and Opportunities

Energy Science &Engineering, EarlyView.
Hybrid integration of multiple Energy Storage Systems (ESSs) within renewable‐powered microgrids enhances reliability, flexibility, and economic sustainability. Lithium‐ion batteries, flow batteries, hydrogen storage, and thermal systems complement each other through coordinated control via Energy Management Systems.
Mohamed G. Moh Almihat, Josiah L. Munda
wiley   +1 more source

Zero emission heating with calcium oxide and water: development and demonstration of first pilot scale thermochemical heating system for buildings

Frontiers in Energy Research
Heat supply for residential buildings is still mainly based on fossil fuels and is thus a significant contributor to CO2 emissions. Renewable heating remains a technological challenge, often for the reason that during cold weather periods heat demand ...
Matthias Schmidt, Venizelos Sourmelis, Viktor Kühl, Marc Linder   +3 more
doaj   +1 more source

Uses of lunar sulfur [PDF]

Sulfur and sulfur compounds have a wide range of applications for their fluid, electrical, chemical, and biochemical properties. Although known abundances on the Moon are limited (approximately 0.1 percent in mare soils), sulfur is relatively extractable
Heiken, G., Pettit, D., Vaniman, D.
core   +1 more source

Synthesis of Carboxylic Cellulose Nanocrystals From Yellow Thatching Grass (Hyparrhenia filipendula) via Citric Acid Hydrolysis

Energy Science &Engineering, EarlyView.
Fractionation of yellow thatching grass using sodium hydroxide and deep eutectic solvent Carboxylated Cellulose nanocrystals (CNCs) were successfully synthesized via hydrolysis with 80 wt% citric acid at 120°C for 4 h Variations in CNC characteristics were observed based on the fractionation method used ABSTRACT Grass is an abundant and renewable ...
Fildah Ayaa, Michael Lubwama, Samuel Ayodele Iwarere, Michael Olawale Daramola, John Baptist Kirabira   +4 more
wiley   +1 more source

Switchgrass to Ethanol: A Field to Fuel Approach [PDF]

The U.S. Energy Independence and Security Act of 2007 mandates the production of 16 billion gallons of cellulosic biofuels by 2022. Desirable feedstock properties, biomass to biofuel conversion rate, and investment required in plant and equipment differs
Epplin, Francis M., Haque, Mohua
core   +1 more source

High‐Titanium Zircon Rims in Rhyolite – A Reflection of Adiabatic Ascent?

Geological Journal, EarlyView.
The ascent of granitic magma from source to emplacement is rapidly achieved through dyking, resulting in negligible heat loss to the surrounding wallrock (i.e., adiabatic). Zircon growth during ascent can record the changing magma conditions including adiabatic cooling and heating, resulting in high titanium rims on low titanium cores without ...
Carson Kinney, Holden Little, Chris Yakymchuk   +2 more
wiley   +1 more source