Air Quality Control


Air Quality Control

Sustainable Development Goals

Opportunities and Challenges

In the past, Thailand has suffered air pollution issues, directly imposing impacts on the environment, the economy and the people’s health. This is particularly the case for particulate matter (PM2.5) exceeding the standard, becoming a crucial problem that is only likely to exacerbate in severity. To resolve the issue, the public sector has developed an action plan to drive forth the national agenda “Resolving Particular Matter Pollution” 2019- 2024, and prioritizing pollution control at establishments. Monitoring and enforcement of relevant laws are conducted stringently. There are also reviews and revisions of air pollution emission standard to continuously control and minimize pollution from the industries. 

PTT, as the national energy company, is fully cognizant of the responsibilities and commitment to become a leader in air quality control, addressing expectation of all stakeholder groups. PTT has thus sprinted to stipulate measures in monitoring and controlling air quality, ensuring compliance with the government’s approach to address air pollution. Internationally recognized modern technology is applied to control the air quality emitted. Notably, this ascertains air control can be achieved effectively per regulatory requirement, with utmost minimum environmental, social, and community impacts. 

Remarks:  One of the long-term measures for an action plan driving forth the national agenda “Resolving Particulate Matter Pollution,” comprises the measure mandating fuel used to contain no more than 10 ppm of Sulphur from the 1st January 2024.


Management Approach

Air Quality Control 

PTT manages air pollution emission, one of the environmental issues, under SSHE management System. There are policieslong-term and annual targets stipulated, as well as monitoring, measurement and governing of performance in line with corporate laws, standards, guidelines, policies, goals and business processes. There is a quarter review on its efficiency and effectiveness according to the SSHE governance structure. There are also on-going governmental reports and disclosures to relevant stakeholders transparently. 

Indicator of Air Pollution with targets designated comprises Volatile Organic Compounds (VOC), Nitrogen Oxide (NOx) and Sulfur Dioxide (SO2) from combustion and evaporation from production process and equipment at various operation sites, such as natural gas separation plan, natural gas transmission pipeline. The long-term targets control the air pollution increase rate, encompassing SO2, NOx and Volatile Organic Compounds (VOCs) to zero. For other pollution, including PM2.5, there are measurements and reports for governmental agencies per regulatory requirement. There are also efforts to monitor and seek methods/tools to minimize impacts that might incur to the employees, operators, community and the public’s health.  

To control air pollution, We are priority controlled its source of origins by using the advanced technology to efficiently mitigate and eliminate air pollutions, such as Dry Low Emission (DLE)  Selective Catalytic Reduction (SCR), camera to monitor VOCs leakage, and preventative equipment maintenance to prevent leakage. In the past, there has been a scale-up for installation of equipment to minimize/treat pollution, as well as monitoring and managing pollution emitted continuously. This enables information to be analyzed and plan for development of air quality control for maximum effectiveness.

Role in Resolving PM2.5 Pollution
As PTT aims to control and resolve the issue of PM2.5, a significant environmental problem to the civil sector, PTT also considered Pollution Control Department’s information on sources revealed that 52% was generated from diesel-fueled vehicles. PTT has demonstrated accountability by becoming part of the private sector with an active role to reduce PM2.5, with measures, both short- and long-term measure, as follows;
  1. Short-term measure: During PM 2.5 crisis between the 16th November 2020- the 28th  February 2021, the PTT Group utilized ultra-low sulfur diesel fuel, whose sulfur is lower than 10 ppm, for sales in Bangkok and the peripheral provinces. IT is estimated that this can help reduce PM2.5 volume by 19 – 21%
  2. Long-term measure: the PTT Group has integrated refinery investment plans in the PTT Group to ensure production of ultra-low Sulfur diesel, whose Sulfur  is below 10 ppm on average
As for other sources of PM2.5, such as open-air combustion, PTT has promoted farmers to collect sugarcane leaves and burn them as fuel for electricitygeneration. All performance is in accordance with  the government’s action plan to drive forth the national agenda “resolving air pollution” 

Furthermore, PTT Innovation Institute has developed the PTT Innovative Hybrid Treatment Prototype for PM2.5 and Airborne Pathogens Removal. The hybrid technology’s efficiency was tested in the laboratories, and it appears that it could remove over 90% of PM2.5 and 99% of airborne pathogens. Furthermore, there was the development of ‘Nong Pim Air Detector,’ an innovation to measure PM 2.5 volume using the principle of light scattering, installed in PTT Headquarter, natural gas station, eastern petroleum storage. Additionally, studies and modeling  to forecast PM2.5 intensity within the vicinity of PTT Headquarter for the objectives of assessing, monitoring and being on guard to prevent potential health impacts on employees. 

Key Performance 

Summary of PTT”s Performance ProgressGRI 305-7

NOx Intensity

(Tonne per million barrel of oil equivalent)

SO2 Intensity

(Tonne per million barrel of oil equivalent)

VOCs Intensity 

(Tonne per million barrel of oil equivalent)

Remark: Data from 2019 onward excludes PTT Oil and Retails Public Co. Ltd. which became a separated entity from PTT as of 2018. This results in reduced emission of VOCs.

PTT Group Performance – Progress 
NOx Volume
(Metric Tonnes)
SO2 Volume
(Metric Tonnes)
VOCs Volume
(Metric Tonnes)

Examples of Key Projects or ActivitiesSDGs 3.9, 12.4
  • Developed PTT Innovative Hybrid Treatment Prototype for PM2.5 and Airborne Pathogen Removal, awarded outstanding state enterprise of 2021 in the category for creativity and innovation. The prototype was scaled up and installed at PTT headquarter buildings and one-stop-service field hospital areas (red areas). COVID-19 screening units in EnCo Terminal building (Enter), the PTT Group’s Giving Breath project, and Phahonyothin Road (Sanam Pao BTS Station).

  • In 2021, there was a scale-up on installation of PM 2.5 dust measuring machine in the industrial areas along natural gas distribution pipeline, primary NGV natural service stations, and other industrial sites, total to over 100 spots covering 12 provinces, such as  Bangkok, Samut Prakan, Pathum Thani, Saraburi, Chachoengsao  Chonburi, Rayong, Ratchaburi Nakorn Ratchasima Prachinburi, Nakorn Pathom, and Phra Nakorn Sri Ayuthaya. There are also plans to scale up results to cover over 200 industrial sites in 2022.
  • PTT studied the PM2.5 Intensity forecast using modeling applications, such as Mekong Air Quality Explorer, by monitoring and comparing PM2.5 intensity as actually measured with Pollution Control Department. This ensures active monitoring of situations which may affect employees’ health.  
Future Plan
We are committed to control, protect, and mitigate air pollution in line with laws and conduct the research and innovations on air pollution mitigating, monitoring, and forecasting tools and methods to achieve the annual target and long-term goals. Key development projects in 2022 include;
  • To study VOCs Control Techniques to develop control method of Volatile Organic Compounds (VOCs) for greater efficiency
  • Study and develop PTT Innovative Hybrid Treatment Prototype for PM2.5 and Airborne Pathogens Removal continuously for commercial release

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