Aqueous phase reforming of sorbitol on Pt/Al2O3: Effect of metal loading and reaction conditions on H2 productivity

HERNAN DUARTE; MARÍA EUGENIA SAD; CARLOS RODOLFO APESTEGUÍA

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2016

0360-3199

The production of hydrogen by aqueous phase reforming (APR) of sorbitolwas studied on Pt-based catalysts at 498 K and 29.3 bar. Four alumina-supported Ptcatalysts (0.30, 0.57, 1.50 and 2.77 %wt Pt) were prepared. The influence ofboth the metallic content and the weight hourly space velocity (WHSV, h-1)on sorbitol conversion and hydrogen selectivity, yield and productivity was investigated.Sorbitol conversion and H2 yield increased with the amount of Ptwhile the H2 selectivity in the gas phase did not changesignificantly. The H2 productivity was measured on all the catalystsat different WHSV in order to determine the operating conditions required tooptimize the production of hydrogen. The H2productivity increased with the amount of Pt and went through a maximum as thespace velocity was increased. The highest H2 productivity (22 mmol H2/hgcat) was achieved on Pt(2.77%)/Al2O3 at WHSV= 1.8 h-1. At a given space velocity, the H2 productivitydid not depend on the sorbitol concentration in the feed.