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Title: Integrated production of chemicals and energy
Author: Narvaez Dinamarca, Ana Lorena
ISNI:       0000 0004 2683 9090
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2010
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Polygeneration technologies based on synthesis gas allow for the simultaneousproduction of intermediate chemicals and the generation of electricity. The study ofthe integrated production of chemicals and power has different approachesdepending on the products and their demands. This study focuses on the combinedproduction of methanol or dimethyl ether and electricity considering a small tomedium scale production plant to provide chemicals (for applications such astransportation fuel or LPG substitute) and electricity for a small to medium-sizedpopulation. Methanol or dimethyl ether and electricity production were estimated to meet a localtransportation fuel market and off-peak load electricity demand for a small town. The methanol and dimethyl ether synthesis were simulated assuming both asynthesis loop and a once-through configuration. The effect of lower catalyticperformances on the polygeneration system performances was tested in methanoland dimethyl ether production. In addition, direct DME synthesis was assessed atdifferent catalyst loading ratios and also different H2/COx ratios. The flexibility of thecombined systems was studied assuming different approaches to cope with achange on the demand for chemical or electricity. These approaches involvedchanging operating conditions such as the recycle ratio or the synthesis gas feedrate. The feasibility of the polygeneration systems was determined through thecomparison with separate stand-alone configurations for chemical production andpower generation considering requirements of fresh synthesis gas, heating/coolingutilities, and compressor duties. In general, the simulations of the integrated system based on once-throughconfiguration for both MeOH and DME synthesis cases showed lower powerconsumptions and lower fresh synthesis gas requirements compared to theequivalent stand-alone and loop configurations. Finally, the once-throughpolygeneration system is an attractive scheme to produce chemicals and powerbecause of the simplicity of the chemical plant and its lower capital and operatingcosts.
Supervisor: Kershenbaum, Lester Sponsor: Universidad Cat?lica de la Sant?sima Concepci?n ; CONICYT-Gobierno de Chile ; Programme Alban
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available