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Valorization of alginate for the production of hydrogen via catalytic aqueous phase reforming
- Source :
- Catalysis Today. 304:153-164
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Alginate, a carbohydrate abundant in the outer cell wall of macroalgae, was subjected to catalytic aqueous phase reforming (APR) to produce hydrogen using a 3% Pt/C commercial catalyst. The performance of the process was evaluated according to the conversion of the carbon to gas, the hydrogen yield and the hydrogen selectivity. The catalyst and feed amount, temperature, reaction time, pH and the presence of H2 were modified to understand the dependence of the outcome of the process on these parameters. The presence of the catalyst was fundamental in order to increase the hydrogen yield compared to the uncatalyzed reaction, and it can be reused without activity loss. In addition, it was observed that the increase in alginate loading led to a decreasing conversion of the carbon; the yield of hydrogen increases with the increasing temperature and the basic pH had a strong beneficial effect in terms of selectivity. The plateau appeared after 2 h was attributed to the low kinetic tendency of the intermediate compounds to produce hydrogen. The study validated what is present in literature for simpler molecules, moving at the same time towards a more complex feed, closer to a possible industrial application.
- Subjects :
- Hydrogen
010405 organic chemistry
Alginate
Chemistry (all)
Aqueous two-phase system
chemistry.chemical_element
Aqueous phase reforming
General Chemistry
Settore ING-IND/27 - Chimica Industriale E Tecnologica
Carbohydrate
010402 general chemistry
01 natural sciences
Catalysis
Catalysi
0104 chemical sciences
chemistry
Chemical engineering
Yield (chemistry)
Hydrogen production
Molecule
Selectivity
Carbon
Platinum
Subjects
Details
- ISSN :
- 09205861
- Volume :
- 304
- Database :
- OpenAIRE
- Journal :
- Catalysis Today
- Accession number :
- edsair.doi.dedup.....b758f208a33db9e367e055fd80b94688