Results 101 to 110 of about 1,030,475 (236)

Multifunctional Matrix‐Activated Electrodes Enabling Efficient Proton Transport and Durable Low‐Pt Operation for High‐Temperature Proton Exchange Membrane Fuel Cells

Advanced Energy Materials, EarlyView.
This work introduces a CeHP‐enabled multifunctional matrix‐activated electrode (MME) for high‐temperature PEM fuel cells, forming an electrochemically and mechanically functional matrix within the catalyst layer. The design increases peak power density by 38% and reduces voltage decay by 62% at 240 °C, while using only 40% of the Pt loading of a ...
Gyeongseok Gwak, Sunjin Park, Joonbyum Kim, Hena Lee, Jihyeon Ok, Chae Young Lee, JunHwa Kwon, Jong Geun Seong, Sung Pil Yoon, Suk‐Woo Nam, Hansung Kim, Katie Heeyum Lim, So Young Lee   +12 more
wiley   +1 more source

Hydrogen in the Natural Gas Network—Relevance for Existing Fire Precautions

Fire
Power-to-gas technology can be used to convert excess power from renewable energies to hydrogen by means of water electrolysis. This hydrogen can serve as “chemical energy storage” and be converted back to electricity or fed into the natural gas grid. In
Ilian Dinkov, Jan H. Braun, Dietmar Schelb   +2 more
doaj   +1 more source

Surface‐Functionalized MXene for Enhanced Photocatalytic CO2 Reduction

Advanced Energy Materials, EarlyView.
Poly(catechol/p‐cresol)‐functionalized MXene (f‐MXene) enhances oxidation stability while preserving conductivity, enabling efficient interfacial electron transfer in a Cu/f‐MXene/reduced TiO2 photocatalyst. Strong Cu–f‐MXene synergy promotes CO2 activation and selective CH4 production, achieving a CH4 yield of 18.1 µmol g−1 (>200 × vs.
Dongyun Kim, Young Ho Park, Dong Gyu Lee, Kyuseok Lee, Junho Lee, Chaelin Shin, Jaeyoung Kim, B. Yamunasree, Soomin Han, Eunhee Gong, Hyeonjong Jeong, Min Gyu Kim, Chang‐Hee Cho, Seung Jun Lee, Soorathep Kheawhom, G. Murali, Tae Kyung Lee, Insik In, Su‐Il In   +18 more
wiley   +1 more source

Effect of Bend Spacing Configuration on the Vented Explosion Characteristics of Premixed Methane/Hydrogen in Pipelines with a Large Length-to-Diameter Ratio

Fire
Mixing hydrogen into natural gas pipelines for transportation is an effective solution to the imbalance between the supply and demand of hydrogen energy.
Yulin Yang, Jianfeng Gao, Bin Hao, Yanan Han, Xiaojun Shao, Yang Wu, Xiao Wu, Meng Li   +7 more
doaj   +1 more source

How small changes to methylated piperidinium cations impact the synthesis of zeolite SSZ‐39

AIChE Journal, EarlyView.
Abstract Here we report a synthesis study of SSZ‐39 with four different organic structure directing agents (OSDA). The goal was to determine how subtle changes to the OSDA architecture impact crystallization kinetics, material composition, and other properties.
Onyinyechukwu Ukagha, Daniel F. Shantz
wiley   +1 more source

Features of Hydrogen-Enriched Methane–Air Flames Propagating in Hele-Shaw Channels

Energies
Mixtures of hydrogen with common hydrocarbon fuels are considered viable for reducing carbon footprint in modern industry, power production, and transportation.
Sergey Yakush, Sergey Rashkovskiy, Maxim Alexeev, Oleg Semenov   +3 more
doaj   +1 more source

Experimental Investigation on Morphology of Hydrogen-Blended Natural Gas Jet Fires Under Inclined Conditions

Fire
Growing interest in transporting hydrogen via natural gas pipelines highlights the need to understand flame characteristics during accidental leakage.
Jingnan Wu, Zhenhua Wang, Qinghai Liu, Juncheng Jiang, Liang Ma, Mingguang Zhang, Yong Pan, Ru Zhou, Lei Ni, Meng Li, Kaifeng Wang   +10 more
doaj   +1 more source

International Flame Research Foundation Pamphlet - October 1980

, 1980
pamphle
International Flame Research Foundation
core  

Applicability of Optical Emission Spectroscopy for Industrial Flame Analysis with Hydrogen and Natural Gas Mixtures Based on Laboratory Study

Applications in Energy and Combustion Science
This study investigates optical emission spectroscopy as an analysis method for hydrogen and natural gas burner flames relevant to industrial use. The equipment used was a low-cost industrial spectrometer, which measures light in the wavelength range of ...
Arto Rautioaho, Henri Pauna, Mikko Jokinen, Oskari Seppälä, Elsa Busson, Lukas Sankowski, Ville-Valtteri Visuri, Timo Fabritius   +7 more
doaj   +1 more source

A Computational Fluid Dynamic Investigation of Inhomogeneous Hydrogen Flame Acceleration and Transition to Detonation. [PDF]

Flow Turbul Combust, 2018
Khodadadi Azadboni R, Heidari A, Wen JX.
europepmc   +1 more source