Hydrogen production by ethanol reforming driven by solar energy

M. Falco, de, F. Gallucci

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

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.
Original languageEnglish
Title of host publicationProceedings of the AIChE 2010 Spring Meeting and 6th Global Congress on Process Safety (CCPS) 21-25 March 2010, San Antonio, TX
Place of PublicationSan Antonio TX
Pagesdefalco1/1-7
Publication statusPublished - 2010
Eventconference; 25th CCPS International Conference, 44th Loss Prevention Symposium, and the 12th Process Plant Safety Symposium; 2010-03-21; 2010-03-25 -
Duration: 21 Mar 201025 Mar 2010

Conference

Conferenceconference; 25th CCPS International Conference, 44th Loss Prevention Symposium, and the 12th Process Plant Safety Symposium; 2010-03-21; 2010-03-25
Period21/03/1025/03/10
Other25th CCPS International Conference, 44th Loss Prevention Symposium, and the 12th Process Plant Safety Symposium

Fingerprint Dive into the research topics of 'Hydrogen production by ethanol reforming driven by solar energy'. Together they form a unique fingerprint.

Cite this