Results 81 to 90 of about 2,252,922 (304)

Mechanisms driving altitude- and latitude-dependent air quality variations from high-altitude NOx emissions

npj Climate and Atmospheric Science
The environmental impact of nitrogen oxide (NOx) emissions varies with emission altitude and latitude. NOx emissions from subsonic aviation (9-12 km) contribute to net global ozone formation, whereas those from supersonic aircraft (above 14 km) lead to ...
Lucas J. Oh, Sebastian D. Eastham, Steven R. H. Barrett   +2 more
doaj   +1 more source

Monitoring Euro 6 diesel passenger cars NOx emissions for one year in various ambient conditions with PEMS and NOx sensors.

Science of the Total Environment, 2020
In this study, the NOx emissions of four Euro 6 diesel passenger cars ranging from Euro 6 b to Euro 6 d-TEMP in different ambient conditions and driving routes were investigated with a Portable Emissions Measurement System (PEMS) and continuous NOx ...
P. Söderena, J. Laurikko, Christian Weber, Aki Tilli, Keijo Kuikka, A. Kousa, O. Väkevä, Antti Venho, S. Haaparanta, Jukka Nuottimäki   +9 more
semanticscholar   +1 more source

China's Low‐Carbon Energy Transition Over the Past Two Decades: Experiences and Implications

Advanced Science, EarlyView.
China's low‐carbon energy transition features a brief decline and subsequent rebound in coal consumption, alongside the rapid expansion of renewable energy. This study develops a stage‐based analytical framework to explain this evolution from the perspectives of economic development, energy security, and environmental sustainability, revealing how ...
Yu Liu, Zhiyu Tian, Zhengxian Zhang, Xinbei Li   +3 more
wiley   +1 more source

Rising importance of agricultural nitrogen oxide emissions in China’s future PM2.5 pollution mitigation

npj Climate and Atmospheric Science
Controlling ammonia (NH3) emissions through agricultural management has been recognized as effectively mitigating fine particulate matter (PM2.5) pollution in eastern China. However, agricultural nitrogen oxide (NOx) emissions are often overlooked.
Yuanhong Zhao, Zhanpeng Su, Youfan Chen, Suyi Hou, Xiao Lu, Bo Zheng, Lei Liu, Yuepeng Pan, Wen Xu, Xuejun Liu, Lin Zhang   +10 more
doaj   +1 more source

Electrocatalytic Urea Waste Valorization via Water Electrolysis: Transition‐Metal Phosphides for Sustainable Hydrogen Production

Advanced Energy Materials, EarlyView.
This article provides a comprehensive analysis of transition metal phosphides (TMP) as electrocatalysts for urea‐assisted water electrolysis, highlighting the critical role of phosphorus engineering in modulating electronic structure, optimizing active sites, and enhancing catalytic durability.
Shivalingayya Gaddimath, Varsha Kashanner, Soumya Kulkarni, Vishal Sorathiya, Anitha Bamani, Rajveer Singh Rajaura, Mahaveer Kurkuri, Shambhulinga Aralekallu, Yogendra Kumar Mishra   +8 more
wiley   +1 more source

Exploring the Efficacy of Port Water Injection on Air–Fuel Ratios and NOx Emissions in Diesel Engines: An Experimental Study

Engineering Proceedings
Diesel engines are popular due to their efficiency, power, and fewer carbon emission features. But NOx emissions pose a significant challenge to diesel engines’ use.
Asad Asghar Janjua, Waqas Khalid, Samiur Rahman Shah, Xavier Tauzia   +3 more
doaj   +1 more source

A NOx Emission Model Incorporating Temperature for Heavy-Duty Diesel Vehicles with Urea-SCR Systems Based on Field Operating Modes

Atmosphere, 2019
The selective catalytic reduction (SCR) is the most commonly used technique for decreasing the emissions of nitrogen oxides (NOx) from heavy-duty diesel vehicles (HDDVs). However, the same injection strategy in the SCR system shows significant variations
Xin Wang, Guohua Song, Yizheng Wu, Lei Yu, Zhiqiang Zhai   +4 more
doaj   +1 more source

Challenges and enablers in fluidization technology

AIChE Journal, EarlyView.
Abstract Gas–solid fluidized beds provide excellent heat and mass transfer for high‐throughput operations from coating to catalytic conversion and underpin emerging low‐carbon technologies. Yet industrial reliability, scale‐up, and control lag scientific understanding, particularly as finer, stickier, and more variable feedstocks increasingly challenge
J. Ruud van Ommen, Jia Wei Chew
wiley   +1 more source

Influence of nitrogen contents in fuel and oxidizer on nitrogen oxide emissions during NG/O2 combustion

Case Studies in Thermal Engineering
This study aims to understand the NOx emission characteristics during pure oxygen (O2) combustion of natural gas (NG) and to provide design data for application in forging furnaces. We numerically investigated the sensitivity of NOx emissions to an up to
Wontak Choi, Seunggi Choi, Yonmo Sung
doaj   +1 more source

Magnetic field‐assisted concentration swing adsorption for CO2 capture over Fe3O4/fibrous nanosilica‐PEI adsorbent

AIChE Journal, EarlyView.
Abstract Magnetic field‐assisted concentration swing adsorption (CSA) provides an electrification‐compatible alternative to conventional temperature swing adsorption (TSA) by enabling rapid heating/cooling and energy‐efficient regeneration under near‐isothermal conditions, thereby eliminating the need for sensible heat input.
Xiaohao Jia, Fateme Rezaei
wiley   +1 more source