A Study on the Deteriorating Air Quality due to Diesel Buses and the Potential of a Direct Exhaust Gas Capture System as a Solution


Authors : Sanchay Gupta; Naman Doshi; Diya Vora; Riswa Arunkumar; Meet Patil

Volume/Issue : Volume 10 - 2025, Issue 9 - September


Google Scholar : https://tinyurl.com/4fnuytmd

Scribd : https://tinyurl.com/bduvaykx

DOI : https://doi.org/10.38124/ijisrt/25sep1055

Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.

Note : Google Scholar may take 30 to 40 days to display the article.


Abstract : This study investigates the issue of excessive emissions and its impact in educational environments, by analysing the characteristics of three commonly used buses in the UAE—Ashok Leyland Falcon, Tata Elanza, and Toyota Coaster— such as their fuel types, fuel composition, engine specifications, and exhaust systems. This research also quantifies emissions of key pollutants such as CO2, NOx, particulate matter (PM), and unburnt hydrocarbons. Engine configurations and in-built emission control technologies (such as EGR, DPF, or SCR) and emission standards such as Euro 4 are studied to assess their effectiveness in reducing harmful exhaust outputs. Emission measurements were sourced from manufacturer data, certified emission tests, and field observations. The paper concludes by evaluating the environmental impact of each model, and proposing a flue-gas treatment system to ensure sustainable school transport.

References :

  1. Mercedes-Benz Trucks. (n.d.). Bus Euro VI engine systems. Daimler Truck AG. https://www.powertrain.mercedes-benz trucks.com/de/en/powertrain-engine-systems/buses/bus-euro-vi.html
  2. Yuchai. (n.d.). Quality Yuchai YC6A Euro 4 emission (YC6A240-46) diesel engine for coach/city bus. Diesel Engine Cars and Components.
  3. FilterTime. (2021). The ultimate guide to HEPA air filters: Do they really work? https://www.filtertime.com/news/the-ultimate-guide-to-hepa-air-filters-do-they-really-work
  4. Shao, S., et al. (2021). Indoor air quality and health risks from air pollutants in residential buildings. Heliyon, 7(9), e07924. https://doi.org/10.1016/j.heliyon.2021.e07924
  5. U.S. Environmental Protection Agency. (n.d.). What is a HEPA filter? https://www.epa.gov/indoor-air-quality-iaq/what-hepa-filter
  6. He, J., et al. (2024). Advances in diesel engine particulate matter control technologies. Results in Engineering, 20, 101509. https://doi.org/10.1016/j.rineng.2024.101509
  7. Morawska, L., et al. (2017). Airborne transmission of infections and effectiveness of air filters. Journal of Thoracic Disease, 9(9), 3268–3277. https://pubmed.ncbi.nlm.nih.gov/28075569/
  8. U.S. Environmental Protection Agency. (1998). Fabric filter and cyclones. EPA-452/F-03-020. https://www3.epa.gov/ttncatc1/dir1/fcyclon.pdf
  9. Kumar, A., et al. (2021). Diesel engine emissions and control methods: A review. Frontiers in Mechanical Engineering, 7, 799061. https://pmc.ncbi.nlm.nih.gov/articles/PMC8526980/
  10. U.S. Environmental Protection Agency. (2017). Selective catalytic reduction cost manual, 7th edition. https://www.epa.gov/sites/default/files/2017-12/documents/scrcostmanualchapter7thedition_2016revisions2017.pdf
  11. Southwest Research Institute. (n.d.). A systems solution to diesel emissions. https://www.swri.org/newsroom/technology-today/systems-solution-diesel-emissions
  12. DieselNet. (n.d.). Diesel particulate matter (DPM). https://dieselnet.com/tech/dpm.php
  13. Kumar, R., et al. (2025). Particulate matter formation and control methodologies in diesel engines: A comprehensive review. Cleaner Engineering and Technology, 15, 100193. https://doi.org/10.1016/j.clet.2025.100193
  14. Demirbas, A. (2011). Advanced biofuel alternatives to diesel and jet fuels. Energy Sources, Part A, 33(16), 1504–1512. https://phys.org/news/2011-09-advanced-biofuel-alternative-diesel-fuel.html
  15. Clough, P. (2019). Designing experiments for engineering education research. Measurement and Control, 52(7–8), 995–1001. https://doi.org/10.1177/0020294019858167
  16. National Center for Biotechnology Information. (2022). Diesel exhaust. In StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK590901/
  17. Human Rights Watch. (2023). “You can smell petrol in the air”: UAE fossil fuels feed toxic pollution. https://www.hrw.org/report/2023/12/04/you-can-smell-petrol-air/uae-fossil-fuels-feed-toxic-pollution
  18. ZevRoss. (2023). Country report: United Arab Emirates. Health Effects Institute. https://cdn.zevross.com/hei/country-reports/v1/templates/United%20Arab%20Emirates.html
  19. Cool Today. (2023). What kinds of coolant are used in air conditioners? https://www.cooltoday.com/blog/what-kinds-of-coolant-are-used-in-air-conditioners
  20. Valvoline. (n.d.). Advanced cooling technologies for modern engines. Valvoline Global.
  21. Neutral Fuels. (n.d.). About Neutral Fuels. https://www.neutralfuels.com/about
  22. Khaleej Times. (2023, March 20). Dubai school switches to B20 biodiesel for entire bus fleet to boost sustainability. https://www.khaleejtimes.com/uae/education/dubai-school-switches-to-b20-biodiesel-for-entire-bus-fleet-to-boost-sustainability
  23. ScienceDirect. (n.d.). Diesel fuel overview. https://www.sciencedirect.com/topics/engineering/diesel-fuel
  24. Cummins. (2023, March 23). Advantages of diesel engines. https://www.cummins.com/news/2023/03/23/advantages-diesel-engines
  25. California Air Resources Board. (n.d.). Overview: Diesel exhaust and health. https://ww2.arb.ca.gov/resources/overview-diesel-exhaust-and-health
  26. CIMAC. (2012). Guidelines for fuel quality. CIMAC Recommendation 28. https://www.cimac.com/cms/upload/Publication_Press/Recommendations/Recommendation_28.pdf
  27. Sharma, A., et al. (2023). Particulate matter formation and its control methodologies for diesel engines: A comprehensive review. ScienceDirect. https://doi.org/10.1016/j.scitotenv.2023.167820
  28. ScienceDirect. (n.d.). Biodiesel combustion. https://www.sciencedirect.com/topics/engineering/biodiesel-combustion
  29. Demirbas, A. (2008). Calorific values of biodiesel fuels from different raw materials. Energy Sources, Part A, 30(9), 861–867. https://www.sciencedirect.com/science/article/pii/S0960852407005447
  30. Li, X., et al. (2024). ZnH-MOF enables hot CO2 capture relevant to industrial processes. Journal of Materials Science, 59(12), 4211–4224. https://neutrons.ornl.gov/news/2024/zn-h-mof-hot-co2-capture
  31. Rana, A., & Andino, J. M. (2025). A review of materials for carbon dioxide capture. Catalysts, 15(3), 273. https://doi.org/10.3390/catal15030273
  32. Verma, S. K., Tripathi, P., & Bhatnagar, A. (2023). Carbon nanotubes for CO₂ capture and conversion. In Nanomaterials for Carbon Dioxide Capture and Conversion Technologies (pp. 245-260). Elsevier. https://doi.org/10.1016/B978-0-323-89851-5.00007-X
  33. Rohde, R., Carsch, K., Long, J., et al. (2024). High-temperature carbon dioxide capture in a porous material with terminal zinc hydride sites. Science, 386(6723), 814-819. https://doi.org/10.1126/science.adk5697
  34. Zhao, X., Xu, X., Zhang, G., Zhan, W., Tang, Y., & Li, C. (2018). Mesoporous MgO promoted with NaNO₃/NaNO₂ for rapid CO₂ capture. Chemical Engineering Journal, 334, 1554–1563. https://doi.org/10.1016/j.cej.2017.12.106
  35. U.S. Environmental Protection Agency. (2025, March 3). Monitoring by control technique – Activated carbon adsorber. Air Emissions Monitoring Knowledge Base. U.S. EPA. https://www.epa.gov/air-emissions-monitoring-knowledge-base/monitoring-control-technique-activated-carbon-adsorber
  36. ScienceDirect Topics. (n.d.). Exhaust temperature – An overview. In Engineering topics. Elsevier. Retrieved September 20, 2025, from https://www.sciencedirect.com/topics/engineering/exhaust-temperature
  37. Ingale, Y., Rathi, R., Ali, Y., Salve, S., & Khelkar, S. (2023). Air pollution control by using activated charcoal. International Advanced Research Journal in Science, Engineering and Technology, 10(7), 31–35. https://doi.org/10.17148/IARJSET.2023.10742
  38. Kodo, K., Kodo, Y., & Tsuruoka, M. (2000, July 4). System for purifying a polluted air by using algae (U.S. Patent No. US6083740A). United States Patent and Trademark Office. https://patents.google.com/patent/US6083740A/en
  39. The Affordable Organic Store. (n.d.). Algae-based air purifiers: Harnessing nature’s power for cleaner air. Retrieved September 20, 2025, from https://theaffordableorganicstore.com/algae-project/algae-based-air-purifiers-harnessing-natures-power-for-cleaner-air/
  40. Society of Chemical Industry. (2023, December 19). Fresh research for fresh air: Harnessing microbes for removing indoor pollutants. Phys.org. https://phys.org/news/2023-12-fresh-air-harnessing-microbes-indoor.html
  41. Desrousseaux, M., & Liger-Belair, G. (2020). Microalgae-based systems for carbon capture and air purification. Field Actions Science Reports, (Special Issue 20). https://journals.openedition.org/factsreports/6092
  42. United States Department of Energy. (2018). Algae-based carbon capture for air purification: Project report. Office of Scientific and Technical Information. https://www.osti.gov/servlets/purl/1485133
  43. Vieira, C. P., de Souza, J. R., & Freitas, M. A. V. (2023). Harnessing microalgae for sustainable biotechnology. Frontiers in Bioengineering and Biotechnology, 11, 1151440. https://doi.org/10.3389/fbioe.2023.1151440
  44. Mississippi State University. (2010). Algae for biofuels: Economic and environmental costs. Southern Regional Aquaculture Center. https://srac.msstate.edu/pdfs/Fact%20Sheets/4310%20Algae%20for%20Biofuels-%20Economic%20and%20Environmental%20Costs.pdf
  45. All About Feed. (2021, March 8). Algae cultivation to be profitable by 2025. https://www.allaboutfeed.net/animal-feed/raw-materials/algae-cultivation-profitable-by-2025/
  46. ScienceDirect Topics. (n.d.). Air purification – An overview. Elsevier. Retrieved September 20, 2025, from https://www.sciencedirect.com/topics/earth-and-planetary-sciences/air-purification
  47. Number Analytics. (2022, June 14). Ultimate guide: Environmental factors affecting airborne microorganisms. https://www.numberanalytics.com/blog/ultimate-guide-environmental-factors-airborne-microorganisms
  48. [48] Tibbetts, S. M., & Mann, J. (2020). Microalgae in aquaculture feeds and nutrition. Aquaculture, 523, 735–748. https://doi.org/10.1016/j.aquaculture.2019.735048
  49. U.S. Environmental Protection Agency. (2023). Electrostatic precipitators (ESPs). EPA Air Pollution Control Cost Manual. https://www.epa.gov
  50. Indiamart. (2024). Cyclone separators price in India. https://www.indiamart.com
  51. Indiamart. (2024). HEPA filter element price list. https://www.indiamart.com
  52. Sigma-Aldrich. (2024). Metal–organic frameworks product catalog. https://www.sigmaaldrich.com
  53. CIFAR. (2023). CALF-20 MOF sorbent data sheet. https://pubs.acs.org
  54. Trading Economics. (2024). Lithium hydroxide prices. https://tradingeconomics.com
  55. Noon. (2024). Caustic soda flakes 5 kg. https://www.noon.com
  56. Sigma-Aldrich. (2024). Potassium permanganate, analytical grade. https://www.sigmaaldrich.com
  57. Amazon.ae. (2024). Titanium dioxide powder, 100 g. https://www.amazon.ae
  58. Sigma-Aldrich. (2024). Sodium chlorite, 80% technical grade. https://www.sigmaaldrich.com
  59. Adnoc. (2024). AdBlue DEF 10L can. https://www.adnocdistribution.ae
  60. The Affordable Organic Store. (2024). Activated charcoal for filtration. https://theaffordableorganicstore.com
  61. Alibaba. (2024). Chlorella vulgaris powder 1 kg. https://www.alibaba.com
  62. Blue Green Labs. (2023). Scenedesmus dimorphus algae culture. https://www.bluegreenlabs.com

This study investigates the issue of excessive emissions and its impact in educational environments, by analysing the characteristics of three commonly used buses in the UAE—Ashok Leyland Falcon, Tata Elanza, and Toyota Coaster— such as their fuel types, fuel composition, engine specifications, and exhaust systems. This research also quantifies emissions of key pollutants such as CO2, NOx, particulate matter (PM), and unburnt hydrocarbons. Engine configurations and in-built emission control technologies (such as EGR, DPF, or SCR) and emission standards such as Euro 4 are studied to assess their effectiveness in reducing harmful exhaust outputs. Emission measurements were sourced from manufacturer data, certified emission tests, and field observations. The paper concludes by evaluating the environmental impact of each model, and proposing a flue-gas treatment system to ensure sustainable school transport.

CALL FOR PAPERS


Paper Submission Last Date
31 - December - 2025

Video Explanation for Published paper

Never miss an update from Papermashup

Get notified about the latest tutorials and downloads.

Subscribe by Email

Get alerts directly into your inbox after each post and stay updated.
Subscribe
OR

Subscribe by RSS

Add our RSS to your feedreader to get regular updates from us.
Subscribe