Results 21 to 30 of about 1,623,488 (304)

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

The enhancement effect of Nb over CeSi2 catalyst for the low-temperature NH3-SCR performance

Chemical Physics Impact, 2023
Tuning the acid site on the surface of the catalyst tends towards facilitating the selective reduction of NOx by NH3 (NH3-SCR). In this study, a set of catalysts for the Nb/CeSi2 with different loadings of niobium were synthesized and evaluated in terms ...
Lipeng Ding, Shaoxiong Zhang, Qinglong Liu, Peng Yang, Yandi Cai, Wei Tan, Wang Song, Fei Gao, Lin Dong   +8 more
doaj   +1 more source

A systematic review of the impact of commercial aircraft activity on air quality near airports

City and Environment Interactions, 2021
Commercial airport activity can adversely impact air quality in the vicinity of airports, and millions of people live close to major airports in the United States.
Karie Riley, Rich Cook, Edward Carr, Bryan Manning   +3 more
doaj   +1 more source

Recent progress on covalent organic framework materials as CO2 reduction electrocatalysts

Frontiers in Chemistry, 2022
CO2 emission caused by fuel combustion and human activity has caused severe climate change and other subsequent pollutions around the world. Carbon neutralization via various novel technologies to alleviate the CO2 level in the atmosphere has thus become
Yang Fan, Yang Fan, Mengyin Chen, Naizhang Xu, Kaiqiang Wang, Qiang Gao, Jing Liang, Yubing Liu, Yubing Liu   +8 more
doaj   +1 more source

Modeling and Predicting Heavy-Duty Vehicle Engine-Out and Tailpipe Nitrogen Oxide (NOx) Emissions Using Deep Learning

Frontiers in Mechanical Engineering, 2022
As emissions regulations for transportation become stricter, it is increasingly important to develop accurate nitrogen oxide (NOx) emissions models for heavy-duty vehicles.
Rinav Pillai, Vassilis Triantopoulos, Vassilis Triantopoulos, Albert S. Berahas, Matthew Brusstar, Ruonan Sun, Tim Nevius, André L. Boehman   +7 more
doaj   +1 more source

Antibiotic exposure decreases soil arsenic oral bioavailability in mice by disrupting ileal microbiota and metabolic profile

Environment International, 2021
Oral bioavailability of arsenic (As) determines levels of As exposure via ingestion of As-contaminated soil, however, the role of gut microbiota in As bioavailability has not evaluated in vivo although some in vitro studies have investigated this.
Meng-Ya Li, Xiao-Qiang Chen, Jue-Yang Wang, Hong-Tao Wang, Xi-Mei Xue, Jing Ding, Albert L. Juhasz, Yong-Guan Zhu, Hong-Bo Li, Lena Q. Ma   +9 more
doaj   +1 more source

The atomic path for constructing single‐helical superstructure of AuCu bimetallic nanoclusters

Aggregate, 2023
Single‐helical or double‐helical structures are common in living organisms. Helical assembly has been found in the artificial nanoparticles, but how they do so remains poorly understood. Here, we exploit atomically precise Au6Cu6 bimetallic nanoparticles
Ancheng Tang, Xiao Cai, Yong Liu, Jun Hou, Xu Liu, Mingyang Chen, Yan Zhu   +6 more
doaj   +1 more source

Atmospheric emissions from road transportation in India [PDF]

, 2009
India has become one of the biggest emitters of atmospheric pollutants from the road transportation sector globally. Here we present an up-to-date inventory of the exhaust emissions of ten species.
Borken-Kleefeld, J., Baidya, Suman, Baidya, S., Borken-Kleefeld, Jens   +3 more
core   +1 more source

Forecasting Greenhouse Gas Emissions from Heavy Vehicles: A Case study of Semarang City

Jurnal Presipitasi, 2021
In Indonesia, transportation sector, specifically road transport consumed most energy compared to other sectors. Eventually, the energy consumption will increase due to the growth of vehicle number that also escalate emission.
Mochamad Arief Budihardjo, Isaaf Fadhilah, Natasya Ghinna Humaira, Mochtar Hadiwidodo, Irawan Wisnu Wardhana, Bimastyaji Surya Ramadan   +5 more
doaj   +1 more source

Measurement of vehicle particulate emissions. [PDF]

Environmental Health Perspectives, 1975
A constant volume sampler (CVS) compatible auto exhaust particulate sampling system has been built which samples exhaust isokinetically at constant temperature. This system yields internally consistent results and is capable of frequent and convenient operation.
openaire   +2 more sources