Hydrogen production by ethanol reforming driven by solar energy

M. Falco, de, F. Gallucci

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

Samenvatting

In this paper hydrogen prodn. via reforming of ethanol has been studied in a novel hybrid plant consisting in an ethanol reformer and a concg. solar power (CSP) plant by means of a molten salt stream. The heat required by the reforming of ethanol has been supplied to the system by molten salts produced by solar energy. The temp. drop in the molten salt is few K (less than 20K) making the molten salt stream still suitable for steam and electricity prodn. in the co-generative plant. A 2D math. model has been formulated and used in order to simulate the performance of the reformer coupled with heat integration through molten salt. The results show that the hybrid plant proposed here is a good soln. for sustainable hydrogen prodn. An optimized set of operating conditions have been found. 99% Ethanol conversion is achieved with 4.5 m long reactor, while the simulations indicate that both reactor diam. and molten salt flow rate need to be further optimized in order to find the best heat management. A small temp. drop (17 K) in the molten salt stream has however been obsd. which makes the integration of hydrogen prodn. inside a solar power system really attractive. On the other hand there is a compromise between temp. and CO content in the exhaust stream. High temp. is required for achieving high ethanol conversion and to convert the methane produced in the first part of the reactor. The high temp. makes the CO shift reaction not complete so that a downstream low temp. shift reactor is needed. A soln. to be studied in the future can be the use of membrane solar ethanol reforming.
Originele taal-2Engels
TitelProceedings of the AIChE 2010 Spring Meeting and 6th Global Congress on Process Safety (CCPS) 21-25 March 2010, San Antonio, TX
Plaats van productieSan Antonio TX
Pagina'sdefalco1/1-7
StatusGepubliceerd - 2010
Evenementconference; 25th CCPS International Conference, 44th Loss Prevention Symposium, and the 12th Process Plant Safety Symposium; 2010-03-21; 2010-03-25 -
Duur: 21 mrt 201025 mrt 2010

Congres

Congresconference; 25th CCPS International Conference, 44th Loss Prevention Symposium, and the 12th Process Plant Safety Symposium; 2010-03-21; 2010-03-25
Periode21/03/1025/03/10
Ander25th CCPS International Conference, 44th Loss Prevention Symposium, and the 12th Process Plant Safety Symposium

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