![]() ![]() This means that you don't have any extra major factors to make the two compounds want to separate from each other. The boiling points are significantly different (-1☌ butane vs -43☌ propane), and this allows for an ok separation with the first stage - The chemical composition is very similar (both alkanes, only 1 CH2 different), and so the activity coefficient is close to 1, meaning close to ideal mixture behavior. This is your most reliable way of knowing for sure if they will separate. Reasoning: - If you look at the Txy diagram at a given pressure and choose a temperature, the maximum separation you can get would separate the two by about 0.3-0.4 in mole fraction (AKA 0.3 x1 vs 0.7 x2 kind of thing). You can get significant separation in one stage, but it would be insufficient for most purifying purposes. Find the flow rate and composition of both the liquid and vapor streams leaving the flash drum assuming an ideal liquid phase. The flash drum is operated at 40 ☌ and 250 kPa. The feed to the flash unit contains 20 mol ethane and 80 mol n-hexane. ![]() Defining effectively as getting above 90% purity (though in practice you will want upwards of 95%, even 99% or above), one stage is insufficient. A flash drum is used to separate ethane from n- hexane. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |