Images Donate icon An illustration of a heart shape Donate Ellipses icon An illustration of text ellipses. Plant design and economics for chemical engineers Item Preview. EMBED for wordpress. Want more?
Advanced embedding details, examples, and help! Introduction -- 2. Process design development -- 3. General design considerations -- 4. Computer-aided design -- 5. Cost and asset accounting -- 6. Cost estimation -- 7. Interest and investment costs -- 8.
Here, integration was performed with a spreadsheet using the trapezoidal approximation. The result is a value of 2. The outlet concentration is varied until the three reactor volumes rectangular areas on the graph are equal. See Ex. The result, as shown on the graph on the following page, is that the value of the integral for each of the three reactors is 0.
This is a consequence of the economy of scale for such reactors. There are other factors, such as flexibility of multiple reactors that would influence such a selection. If a material other than glass-lined was chosen, the cost figures would be different, but the relative values would be very similar. Each of the reactor types and volumes suggested in parts a through d , will be matched with the reciprocal rate vs.
This reaction is autocatalyzed, and the reaction rate initially increases as the glucose concentration decreases, because the biomass concentration increases. Eventually, the glucose concentration decreases sufficiently to cause the reaction rate to decrease; the increase of ethanol concentration contributes somewhat to the decrease also.
Two guidelines are helpful. For PFR combinations, the order or sequence of PFR reactors makes no difference, because the reactor volume is proportional to the area under the reciprocal rate vs. So this area and the resulting outlet concentration are fixed, regardless of the order. The order of CSTRs is important, however, because the conditions at the reactor outlet determine the reaction rate in the reactor.
Starting at the initial glucose concentration, as long as the reciprocal rate is decreasing rate is increasing , the conversion achieved with a given volume of CSTRs will be greater than that for the same volume of PFRs, and the larger CSTR should be be used first. These guidelines are illustrated by the following solution. The following solution is based on the conditions for part b of problem 8. A graph of reciprocal rate vs. The only variable left is cglucose,f and this is read from the abcissa of the graph on the following page for the ordinate equal to 0.
Since sequence matters for the two unequal CSTR case, both combinations must be tried to find the one that gives the lowest cglucose,f. The better combination, the 2- m3 CSTR followed by the 1-m3, is shown on the graph. Mechanical engineering is an engineering branch that combines engineering physics and mathematics principles with materials science, to design, analyze, manufacture, and maintain mechanical systems. Dec 31, dec 31, dec 31, dec 31, dec 31, dow chemical co. A short summary of this paper.
Plant Design and Economics for Chemical Engineers 5th from bukharibooks. Full pdf package download full pdf package. First edition second edition third edition fourth edition fifth edition converted to ebook print isbn 0 1 eisbn 0 8 commissioning editor julia read production manager werner von gruenewaldt editorial manager daleen venter copy editor yvonne kemp proofreader yvonne kemp cover design by.
The mechanical engineering field requires an understanding of core areas including mechanics, … Principles, practice and economics of plant … Mechanical engineering is an engineering branch that combines engineering physics and mathematics principles with materials science, to design, analyze, manufacture, and maintain mechanical systems. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application.
Please contact savvas learning company for product support.
0コメント