Risk assessment and inhibition of thermal runaway in vinyl acetate polymerization system

doi:10.16265/j.cnki.issn1003-3033.2017.01.019

Abstract

Abstract: In order to evaluate the thermal runaway risk of the VAC polymerization system and to develop an emergency inhibition methodology, an experimental study was made by using an adiabatic calorimeter VSP2. The associated runaway risk was evaluated and the proper adding time and amount of the inhibitor were determined based on the ZHA hazard analysis method. The results show that the risk is second to the most dangerous, the ΔT_ad is over 100 ℃,and TMRad is around 10 min, and that the runaway could be effectively suppressed by the addition of solvent (no less than 20% VAC in mass) when the system temperature is below 73 ℃.

Key words: vinyl acetate(VAC), polymerization system, thermal runaway, risk assessment, adiabatic temperature rise(ΔT_ad), time to maximum rate under adiabatic condition(TMR_ad)

CLC Number:

X937

JIN Manping, ZHU Yunfeng, ZHANG Jing, SUN Feng, XU Wei, SHI Ning. Risk assessment and inhibition of thermal runaway in vinyl acetate polymerization system[J]. China Safety Science Journal, 2017, 27(1): 104-109.

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