|
Problem: The reaction between propane and hydrogen chloride to form propyl chloride and hydrogen is carried out in a continuous reactor. The product stream is analyzed and found to contain 27.45 mole% C3H7Cl, 27.45 mole % H2 and 14.6% HCl. The feed to the reactor contains only propane and hydrogen chloride. Calculate the fractional conversion of the limiting reactant and the percentage by which the other reactant is in excess. If the molar flow rate of the feed stream is 290 mol/s, what is the extent of reaction? (Give its numerical value and its units.) Explanation: We want to use moles in our table because we are dealing with a process that has a reaction in it. This means we need to write extents of reaction equations to solve for information around the reactor. We could, if we wanted to check our answer at the end, convert all our numbers to masses to make sure they balance too, but we won't do that right now. The number of rows should be equal to the number of streams on our flow chart. In this case, you could go back to look at whether we need a flow chart to see that we have an inlet and outlet. This gives us ony two streams so we need to rows. The number of columns for a mass balance when there are no reactions should have a column for each chemical in the system plus an extra one for the total mass in the stream. When we have reactions, we should only have columns for each chemical and none for the total. This is because we'll be putting mole flowrates in the table and these may not balance when a reactor is inside our balance boundaries. So here we need four columns because we have four chemicals in the system. Let's look at the table before we ask you to start filling in information on the table...
|
|
© 2007 Arizona Board of Regents for The University of Arizona |