The upper explosion limit of C3H8/C2H4 mixtures in air at high temperatures and pressures

CHEN Sheng; NING Ye; HE Meng; QI Chang; WANG Yalei; YAN Xingqing; YU Jianliang

doi:10.11883/bzycj-2022-0475

Volume 43 Issue 6

Jun. 2023

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CHEN Sheng, NING Ye, HE Meng, QI Chang, WANG Yalei, YAN Xingqing, YU Jianliang. The upper explosion limit of C3H8/C2H4 mixtures in air at high temperatures and pressures[J]. Explosion And Shock Waves, 2023, 43(6): 065401. doi: 10.11883/bzycj-2022-0475

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CHEN Sheng, NING Ye, HE Meng, QI Chang, WANG Yalei, YAN Xingqing, YU Jianliang. The upper explosion limit of C₃H₈/C₂H₄ mixtures in air at high temperatures and pressures[J]. Explosion And Shock Waves, 2023, 43(6): 065401. doi: 10.11883/bzycj-2022-0475

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The upper explosion limit of C₃H₈/C₂H₄ mixtures in air at high temperatures and pressures

doi: 10.11883/bzycj-2022-0475

1.
Technology Innovation Center of Risk Prevention and Control of Refining and Chemical Equipment for State Market Regulation, China Special Equipment Inspection and Research Institute, Beijing 100029, China
2.
School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Received Date: 2022-10-31
Rev Recd Date: 2023-03-16

Available Online: 2023-04-11

Publish Date: 2023-06-05

Abstract

Abstract

It is necessary to understand the upper explosion limits of C₃H₈/C₂H₄ mixtures to prevent the potential explosive risks of flammable gas mixtures in the process of high temperatures and pressures. An experimental device of a 20 L spherical vessel with high pressure placed in a high-temperature oven was set up to test the upper explosion limits of C₃H₈/C₂H₄ mixtures at high pressure and temperature. The partial pressure method was used to prepare the mixtures of C₃H₈, C₂H₄, and air with a certain concentration. A pressure rise amplitude of 5% was adopted to judge whether the explosion occurred. The initial temperature ranged from 20 ℃ to 200 ℃, and the initial pressure ranged from 0.1 MPa to 1.5 MPa in the experiments. The effects of temperature, pressure, and volume fraction of C₂H₄ on the upper explosion limit of C₃H₈/C₂H₄ mixtures were analyzed. The results show that the upper explosion limit of C₃H₈/C₂H₄ mixtures increases with the rises of temperature and pressure, but the increase rate of the upper explosion limit decreases significantly with the increase of C₂H₄ concentration when the initial pressure is higher than 0.3 MPa. The amplitude increase and rate of the upper explosion limit with C₂H₄ at high temperatures and pressures are higher than those at normal conditions. The influences of temperature and pressure on the upper explosion limit are much greater than the sum of the two effects alone, indicating that the C₃H₈/C₂H₄mixtures have a higher explosion risk under the synergistic effect of high temperature and pressure, and it will be further enhanced with the increase of C₂H₄ concentration. The influence of the temperature, pressure, and their synergistic effects on the upper explosion limit of C₃H₈/C₂H₄ mixtures in different proportions are comprehensively analyzed, and the corresponding functional relations of the temperature-upper explosion limit, pressure-upper explosion limit, and temperature-pressure-upper explosion limit in different volume fractions of C₂H₄ are summarized by the non-linear regression of surface.
- high temperature,
- high pressure,
- upper explosion limit,
- C₃H₈/C₂H₄ mixture

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References

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