Citation

Xin B, Yu J, Dang W, Bai Y, Yu A. China Saf. Sci. J. 2022; 32(4): 80-85.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.04.012

PMID

unavailable

Abstract

In order to improve prediction accuracy of multi-component mixture risks, hazard characteristics of three typical mixtures of high SNG, liquefied petroleum gas (LPG) and gasoline were studied based on risk theory. ESPD of 17 kinds of scenarios was calculated according to multi-component model theory and mixture characteristics. Then, difference between pure component model and multi-component one in QRA was compared and analyzed, and an optimal simplified risk prediction model for multi-component mixtures was proposed. The results show that for SNG, ESPD of pure component is underestimated by 19. 9% - 61. 4% compared with the multi-component. In the case of LPG, it is underestimated by 13. 6%-26. 0% to adopt substitution of pure propane, but overestimated by 43. 3%-273. 5% to adopt " propane + butane" substitution. Moreover, for gasoline, it is overestimated by 2%-9. 7% for use of n-hexane, but underestimated by 78. 8%-95. 3% for that of octane. A method of equating a multi-component mixture to one or more pure substances may significantly underestimate or overestimate risks of mixtures, and it is suggested to adopt a two-component mixed model in risk assessment. © 2020 China Safety Science Journal. All rights reserved.

Language: zh