DEVELOPMENT OF A STANDARD GAS GENERATOR FOR SO<sub>3</sub>

DENG Jianguo; WANG Dongbin; JIANG Jingkun

doi:10.13205/j.hjgc.202409025

Volume 42 Issue 9

Sep. 2024

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DENG Jianguo, WANG Dongbin, JIANG Jingkun. DEVELOPMENT OF A STANDARD GAS GENERATOR FOR SO3[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(9): 255-260. doi: 10.13205/j.hjgc.202409025

Citation:

DENG Jianguo, WANG Dongbin, JIANG Jingkun. DEVELOPMENT OF A STANDARD GAS GENERATOR FOR SO₃[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(9): 255-260. doi: 10.13205/j.hjgc.202409025

DENG Jianguo, WANG Dongbin, JIANG Jingkun. DEVELOPMENT OF A STANDARD GAS GENERATOR FOR SO3[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(9): 255-260. doi: 10.13205/j.hjgc.202409025

Citation:

DENG Jianguo, WANG Dongbin, JIANG Jingkun. DEVELOPMENT OF A STANDARD GAS GENERATOR FOR SO₃[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(9): 255-260. doi: 10.13205/j.hjgc.202409025

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DEVELOPMENT OF A STANDARD GAS GENERATOR FOR SO₃

doi: 10.13205/j.hjgc.202409025

1. School of Environment, Tsinghua University, Beijing 100084, China;
2. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China

Received Date: 2024-07-12
Available Online: 2024-12-02

Abstract

Abstract

SO₃ is one of the most important precursors of condensable particulate matter, and easily transferred into blue flue gas after emission, which causes adverse effects on the atmospheric environment. SO₃ is also corrosive and hazardous gas. It is necessary to measure and monitor its concentration in flue gas. At present, the results and accuracy for methods monitoring SO₃ in flue gas are difficult to judge and equipments need to be calibrated regularly. However, SO₃ is reactive and difficult to store in the tank and must be generated on-site. The lack of ready-made standard gas is the major limiting factor for accurate measurement and monitoring of SO₃. In this paper, a SO₃ generator was developed based on the principle of catalytic oxidation. Its performance, stability, and influencing factors were evaluated. The conversion ratio was stable at 98.5% on the condition that injecting 1000 ppm(μmol/mol) SO₂ at a flow rate of 0.1 L/min, loading 600 mg vanadium catalysts (40~60 mesi), and setting the conversion temperature at 430 ℃. By diluting the highly-concentrated SO₃ with clean air of different flow rates, the generator linearly outputs SO₃ standard gas in the range of 10 ppm to 1000 ppm, which can be used for calibration of measurement and monitoring of SO₃.
- stationary source,
- SO₃,
- standard gas generator,
- calibration,
- condensable particulate matter

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References(21)

References

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