We investigate the effect of the platinum particle size and the pH of the feed solution in the glycerol gas-phase reforming reaction at low-temperature (623 K) over carbon black-supported Pt catalyst with different platinum loadings (1, 3, 5, and 10 wt.%). We also verify the influence of the aqueous glycerol (30 wt.%) feeding solution pH in the reaction at low-temperature (WHSV = 33 min(-1) and P =1 bar) over the 5 wt.% Pt/C catalyst. Glycerol gas-phase reforming demonstrates being a structure-sensitive reaction and it has its activity and selectivity changed with the size of the platinum particle size. The size increasing leads to an increasing of the CO and Glycerol TOF and selectivity towards gaseous products, formed by consecutive C-C cleavages. Despite no remarkable change is observed in the selectivity under the reaction condition with different pHs of the glycerol aqueous solution, there is an activity decrease. (C) 2016 Elsevier B.V. All rights reserved.