Real-world particulate, GHG, and gaseous toxic emissions from heavy-duty diesel and natural gas vehicles

Atmospheric Environment, Journal Year: 2024, Volume and Issue: 327, P. 120512 - 120512

Published: April 8, 2024

Language: Английский

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On-road evaluation and regulatory recommendations for NOx and particle number emissions of China VI heavy-duty diesel trucks: A case study in Shenzhen

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 928, P. 172427 - 172427

Published: April 16, 2024

Language: Английский

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Emissions from heavy-duty diesel, natural gas, and diesel-hybrid electric vehicles – Part 1. NOx, N2O and NH3 emissions

Fuel, Journal Year: 2024, Volume and Issue: 371, P. 132175 - 132175

Published: June 9, 2024

Language: Английский

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Real-World Particle Emissions from a Modern Heavy-Duty Diesel Vehicle during Normal Operation and DPF Regeneration Events: Impacts on Disadvantaged Communities

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: 59(1), P. 699 - 708

Published: Jan. 3, 2025

We assessed the real-world particulate emissions of a goods movement diesel vehicle, with an emphasis on total particle number and solid at different cutoff sizes. The vehicle was tested routes in South Coast Air Basin (SCAB) California, representative typical operation between ports to warehouses logistic centers mixture urban highway driving, as well elevation change. evaluated during normal filter (DPF) active regeneration events. Results revealed small variations routes, particles below 23 nm even 10 being abundant exhaust. Both were about 3 246 times higher DPF compared operation, fractions sub-10 particles. showed that daily for SCAB, especially more mostly occurred within disadvantaged communities, minority populations high indices poverty, unemployment, poor education. Our results indicated vehicles spent fraction their time these areas low speed idling conditions, resulting disproportionately exposures ultrafine

Language: Английский

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Investigation of moringa oleforia biodiesel doped with 1- Hexanol + Al ₂ O ₃ catalyst in single cylinder compression ignition engine

International Journal of Ambient Energy, Journal Year: 2025, Volume and Issue: 46(1)

Published: Feb. 14, 2025

This experimental investigation focused on testing the single-cylinder diesel engine followed by 90D7MO3H + 25 ppm Al2O3, 80D14MO6H 50 70D21MO9H 75 100 MO and 100D. The 1-Hexanol acts as an ignition improver, Al2O3 is a novel catalyst for boosting performance, improving combustion rates, reducing emission formations. blend achieved BTE of 33.2%, which 10.67% higher than Diesel. BSFC 0.23 kg/kWh 30.43% less Diesel, Max HRR reached 85 KJ/CA degree 83 KJ/CA, peak pressures 70 bar Al2O3. HC emissions are low 58 ppm, Which 27.9% lower Diesel.70D21MO9H possesses very CO CO2 with marginal difference 28.57% 17.4% NOX 1760ppm, 14.78%

Language: Английский

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Establishing an implementation framework for dynamic carbon monitoring in the AEC industry

Sustainable Energy Technologies and Assessments, Journal Year: 2025, Volume and Issue: 76, P. 104289 - 104289

Published: April 1, 2025

Language: Английский

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Modulation of Electron-Donation Ability to Enhance the Low-Temperature NO Oxidation Performance of Mn₃O₄/YMn₂O₅

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(19), P. 28276 - 28286

Published: April 30, 2025

Managing the substantial NOx emissions during cold start of diesel vehicles presents a critical environmental challenge. Enhancing conversion NO to NO2 at low temperatures can significantly improve efficiency aftertreatment systems. Manganese-based mullite catalysts are cost-effective and promising for oxidation; however, their low-temperature activity requires further enhancement. In this study, we innovatively leverage strong electronic interactions between Mn3O4 YMn2O5 enhance oxidation (50% 200 °C) Mn3O4/YMn2O5, demonstrating high (CO conversion: T100 = 222 °C, C3H6 209 C3H8 341 maximum 78.7% 300 stability 100%, 94.06%, °C 10 h) under simulated exhaust gas mixture. Structural analysis (X-ray diffraction (XRD), Raman, transmission electron microscopy (TEM)) confirmed uniform coexistence phases. Furthermore, X-ray photoelectron spectroscopy (XPS) absorption fine structure (XAFS) indicated that decreased average Mn valence state, increased Mn-Mn interactions, modified Mn-O coordination, contributing improved catalytic performance. situ diffuse reflectance infrared Fourier transform (DRIFTS) density functional theory (DFT) calculations revealed Mn3O4/YMn2O5 enhances transfer adsorbed O2, reducing its dissociation energy barrier destabilizing nitrite intermediates, thereby accelerating Eley-Rideal (E-R) mechanism oxidation.

Language: Английский

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A Comparison Between the Gaseous and Particulate Emissions from Diesel and Natural Gas Yard Tractors

Emission Control Science and Technology, Journal Year: 2024, Volume and Issue: 10(2), P. 162 - 174

Published: July 16, 2024

Language: Английский

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Simulation of Submicron Particulate Matter (PM1) Dispersion Due to Traffic Rerouting to Establish a Walkable Cultural Tourism Route in Ratchaburi’s Old Town, Thailand

Atmosphere, Journal Year: 2024, Volume and Issue: 15(3), P. 377 - 377

Published: March 19, 2024

Cultural tourism helps preserve cultural heritage and provides economic opportunities for local communities. A walkable route has been developed the old town of Ratchaburi, Thailand. Here, we assessed changes in PM1 after cars were banned from tourist route. near-roadway dispersion model, R-LINE, was evaluated used to explore base case (BC) two scenarios, S1 S2. In BC, road traffic activities reflected current situation; S1, all vehicles route; S2, drivers encouraged park their outside study area. The area observed calculate emission rates model inputs. capable simulating concentration, especially average concentration over monitoring period. An increase seen at main due increased volume that had redirected route, with an daily 4.5% compared BC. S2 showed a decrease 8.9%. These findings suggest need mitigation measures prior initiating tourism, meet environmental sustainability requirements.

Language: Английский

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Experimental Research on Regulated and Unregulated Emissions from E20-Fuelled Vehicles and Hybrid Electric Vehicles

Atmosphere, Journal Year: 2024, Volume and Issue: 15(6), P. 669 - 669

Published: May 31, 2024

Ethanol as a renewable fuel has been applied in vehicles (FVs), and it is promising hybrid electric (HEVs). This work aims to investigate the emission characteristics of ethanol both FVs plug-in (PHEVs). The paper conducted real-road test an internal combustion FV PHEV, respectively, based on world light vehicle cycle (WLTC) by using gasoline regular under different temperature conditions. use E10 E20 effective reducing conventional emissions vehicles. At 23 °C, reduced including carbon monoxide (CO), total hydrocarbon compound (THC), non-methane (NMHC), particulate matter (PM), number (PN) 15.40–31.11% 11.00–44.13% respectively. 6 THC, CO, PM 2.15–8.61% 11.02–13.34%, However, nitrogen oxide (NOX) increased varying degrees. reduction trend non-conventional methane (CH4), nitrous (N2O), dioxide (CO2) from fueled with not significant for Overall, effect better than that E10, at low temperatures. Lower ambient temperatures increase low-speed segment but decrease ultra-high-speed segment. HEV PN, are 25.28%, 12.72%, 77.34%, 64.59%, compared gasoline, HEVs contributes overall emissions.

Language: Английский

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