How can NOx emissions from transportation be reduced in cities?
Best insight from top research papers
NOx emissions from transportation in cities can be reduced through various strategies. One approach is the implementation of advanced low-temperature combustion (LTC) strategies, such as homogeneous charge compression ignition (HCCI), premixed charge compression ignition (PCCI), and reactivity controlled compression ignition (RCCI) engines, which can simultaneously reduce NOx and soot emissions while maintaining higher thermal efficiency . Another method is the use of after-treatment technologies, such as selective catalytic reduction (SCR), which converts NOx in the exhaust gas into nitrogen gas and water vapor through the use of a catalyst . Additionally, transportation policies aimed at reducing traffic can significantly decrease NOx concentrations, improving air quality. The Covid-19 pandemic has demonstrated the potential for rapid changes in transportation use to result in significant decreases in NOx emissions . Furthermore, the upcoming revision of Euro vehicle emission standards could lead to a feasible reduction in new vehicle emissions of up to 80% for nitrogen oxides (NOx) through the implementation of current emission control systems . Finally, measures such as banning the circulation of trucks that do not meet emission standards have shown a decrease in NO2 concentrations in cities .
Answers from top 4 papers
More filters
| Papers (4) | Insight |
|---|---|
01 Aug 2019 4 Citations | Low emission zones, which ban circulation for more polluting vehicles, can be an effective way to reduce NOx emissions from transportation in cities. (Not mentioned in the paper) |
12 Citations | The provided paper does not specifically address how NOx emissions from transportation can be reduced in cities. |
30 Jun 2023 | The provided paper does not specifically discuss how NOx emissions from transportation can be reduced in cities. The paper focuses on various methods for reducing NOx emissions in diesel engines, but it does not provide information on transportation in cities. |
01 Jan 2022 1 Citations | The provided paper discusses low-temperature combustion (LTC) strategies such as HCCI, PCCI, and RCCI engines, which can reduce NOx emissions in transportation. |
Related Questions
What scenario can reduce traffic emissions?5 answersA scenario that can effectively reduce traffic emissions involves the integration of intelligent transportation systems (ITS) with surveillance cameras and sensors to control traffic signal timing based on vehicle volume. Additionally, the application of connected automated vehicles (CAVs) in urban transportation can significantly decrease fuel consumption and traffic emissions, with a reduction ratio of up to 32% when the penetration rate of CAVs is 100%. Furthermore, alternative fuel technologies like liquefied natural gas (LNG) for light-duty vehicles show promise in reducing greenhouse gas emissions, with a scenario-based traffic simulation approach demonstrating the potential for substantial emission reductions. Implementing exclusive lane configurations at intersections, especially for left and right turn lanes, can also lead to significant reductions in CO, HC, and NOx emissions.
How to reduce emissions in shipping?5 answersTo reduce emissions in shipping, various strategies and technologies can be implemented. Alternative fuels like hydrogen, ammonia, and LNG, along with hybrid power systems, are effective in reducing carbon emissions. Additionally, the use of exhaust gas cleaning systems, such as scrubbers, can help in removing SOx, NOx, and particulate matter emissions. Monitoring emissions through advanced technologies like unsupervised clustering techniques on satellite data can aid in compliance verification and identifying sources of emissions. Furthermore, the integration of IoT and AI advancements can provide a holistic approach to continuously monitor and estimate vessel emissions, improving efficiency and sustainability. By combining these approaches, the maritime industry can work towards achieving significant reductions in emissions and enhancing environmental sustainability.
What are the most effective ways to reduce pollution and emissions?5 answersThe most effective ways to reduce pollution and emissions include strengthening environmental regulation, improving energy consumption structure, promoting industrial structure adjustment and upgrading, and implementing after treatment of exhaust emissions. Mandating vessels to reduce their speed when entering and leaving ports can also significantly reduce vessel emissions. Additionally, incorporating state-of-the-art designs for air pollution control systems and implementing effective air pollution control devices can help reduce pollutant concentrations and emissions. Furthermore, targeting gross polluters and implementing emissions reduction policies specifically for them can be more effective in reducing emissions compared to limiting circulation based on a non-informed choice of vehicles. These measures can contribute to reducing pollution and emissions, thereby mitigating their impact on the environment and human health.
What are the most effective ways to reduce CO2 emissions from transport?5 answersThe most effective ways to reduce CO2 emissions from transport include the use of automated traffic control systems integrated into intelligent transport systems (ITS). Environmental expenditures and green transportation can also significantly cut transportation emissions in the short and long runs. Additionally, the production and use of synthetic fuels made from carbon dioxide and sustainably-produced hydrogen can help reduce CO2 emissions in the medium term. Another approach is the implementation of negative emission technologies such as bioenergy with carbon capture and storage (BECCS) and the use of solid oxide fuel cells (SOFC) running on biofuels in electric vehicles (FCEV). These measures require the expansion of renewable electricity generation capacities and the establishment of corresponding infrastructure. Overall, a combination of intelligent traffic control systems, green transportation, synthetic fuels, and negative emission technologies can contribute to significant reductions in CO2 emissions from transport.
What are the main strategies to reduce the impact of urban transport on climate change?4 answersStrategies to reduce the impact of urban transport on climate change include improving energy efficiency and promoting sustainable travel modes such as public transport and cycling. Urban planning plays a crucial role in encouraging sustainable mobility by focusing on shorter travel distances and developing mass public transport systems. Additionally, policies that prioritize public transport vehicles in terms of time and space can help shift people towards using public transport. Connectivity and automation technologies can also contribute to reducing greenhouse gas emissions by optimizing the performance and comfort of public transport vehicles. Furthermore, concentrating residential development near urban centers and promoting targeted solutions for certain population groups can increase access to sustainable mobility. It is important to note that the effectiveness of these strategies may vary depending on factors such as income level, population growth rate, and existing public transport supply.
How can we reduce traffic congestion in urban areas?3 answersTo reduce traffic congestion in urban areas, several approaches can be implemented. One effective strategy is the use of congestion charges, which have been successful in reducing traffic jams in large cities. Another approach is the implementation of intelligent transportation systems, such as traffic prediction schemes, which can help in forecasting traffic flow and reducing overall congestion. Connected vehicles and centralised real-time re-routing can also be utilised to suggest alternative routes and mitigate congestion issues. Additionally, the implementation of one-way traffic systems has shown to be effective in reducing traffic congestion and improving traffic flow. It is also important to consider socio-demographic and economic factors, as they have a significant impact on traffic congestion. Understanding the influence of these factors can help in developing effective congestion management practices.