کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
231517 1427427 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimation of lower flammability limits in high-pressure systems. Application to the direct synthesis of hydrogen peroxide using supercritical and near-critical CO2 and air as diluents
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Estimation of lower flammability limits in high-pressure systems. Application to the direct synthesis of hydrogen peroxide using supercritical and near-critical CO2 and air as diluents
چکیده انگلیسی

A method for the prediction of the LFL at high pressures, where data are scarce, based on the calculation of adiabatic flame temperatures for the mixtures H2 + O2 in CO2 and N2, between 1.0 and 300 bar and 288–348 K is presented. A group contribution equation of state (GC-EoS) has been selected to predict thermodynamic properties of the mixture, i.e. residual enthalpy, heat capacity and others, as well as phase equilibrium data, giving deviations lower than 10% at high pressures. The use of CO2 as a diluent increases the operational margin from 4.5 mol% H2 at 1 bar up to ca. 7.0–9.0 mol% H2 at 200 bar due to the increase in the heat capacity. On the other hand, the use of nitrogen or air as a diluent only increases the margin from 5.2 mol% H2 at 1 bar up to ca. 6.0 mol% H2 at 200 bar.

Figure optionsDownload as PowerPoint slideResearch highlights▶ Estimation of lower flammability limit (LFL) at high pressures. ▶ Using GC EoS for prediction. ▶ Positive effect of CO2 increasing LFL. ▶ Direct synthesis of H2O2 using supercritical CO2.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 56, Issue 1, February 2011, Pages 33–40
نویسندگان
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