高温高压下 CH4/C2H6 及 C2H6/H2O 在纯氧中的爆炸上限

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The upper explosion limits of CH4/C2H6 and C2H6/H2O mixtures at elevated temperatures and pressures in oxygen

WU Chuandong， CAO Dong， QI Chang， YAN Xingqing， YU Jianliang （SchoolofhemicalEngineering，aianUnversityofTechnology，alian624，iaoning，ina）

Abstract：Theexplosionlimitservesasakeyparameterforaessingexplosionrisksandpreventionstrategiesofcombustible gases.Through aself-developed 5-liter experimental platform for flammable gas explosion characteristics，the upper explosive limits （UELs） of CH4/C2H6 and C2H6/H2O gas mixtures under high-temperature and high-pressure conditions were investigated， revealingthe influence mechanisms of methane blending ratios and steam concentrations on the UELs of ethane under such extreme environments.The results demonstrate that methane blendingratios （0-0.5） exhibit minimal influence on the UELs of CH4/C2H6 mixtures at 200∘C and 0.4-0.6MPa ， and the UELs of CH4/C2H6 mixtures increase with increasing initial pressure， while exhibiting a progressively diminishing rate of UEL increment. Under identical thermal conditions （ 200∘C 0 0.4-0.6MPa ） the UELs of C2H6/H2O mixtures decrease approximately linearly with increasing water vapor concentrations （0-40%） ！ Conversely， higher initial pressures enhance the UELs of C2H6/H2O mixtures. Notably， under 0.5MPa pressure， as temperature increases from 200°C to 270% ，the UELs of both pure ethane and C2H6/H2O mixtures containing 40% Water vapor increase with a rise in temperature， with pure ethane demonstrating an accelerating UEL increase rate.

Keywords： elevated temperature; elevated pressure; CH4/C2H6 mixtures; C2H6/H2O mixtures; upper explosion limit

乙烯是全球最重要的化工产品之一，占石化产品的 75% 以上，其产量是一个国家石化工业发展水平的关键指标。（剩余13048字）