Answered: 1. Biodiesel is formed by the reaction…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Transcribed Image Text:1. Biodiesel is formed by the reaction of lipids (fats and oils) with an alcohol in the presence of a catalyst (usually base). However, water is often in the oils and needs to be removed because the presence of water will cause the production of soap instead of biodiesel. A flash drum is used to remove water from Stearic Acid. A 175 mol/h mixture of 80 mol % Stearic Acid (SA) and 20 mol% Water (W) is flashed isothermally from 70 bar to 20 bar at 723.15 K. Assume Raoult's Law applies (an ideal mixture). Antione's Equation (logo) parameters are given below for P (bar) and T (K). A B C Water 3.55959 643.748 -198.043 Stearic Acid 5.72544 3348.131 -57.825 and do a degree a. Draw a process flow diagram of freedom analysis b. Calculate the molar flow rates (mol/h) and compositions of the product streams analytically (No Excel Solver). c. Determine the molar flow rates (mol/h) and compositions graphically (Use the Pxy graph at end of document).