Cellulose [C6(H2O)5] was co-ground with calcium (Ca(OH)2) and nickel (Ni(OH)2) hydroxides, followed by heating the ground samples up to 1000 °C for determination of temperature range at which hydrogen (H2) gas can be generated. The results showed that the main gaseous products were; H2, CH4, H2O, CO, and CO2with H2as the dominant gas generated between 350 and 550 °C. Analyses of the gaseous products by TG-MS and gas-chromatography, and solid products by TG-DTA and XRD showed that CO2gas was fixed as CaCO3at temperatures between 350 to 600 °C allowing generation of H2gas with concentrations ranging from 90 to 99% with carbon oxide (CO, CO2) concentrations less than 1%. A plausible reaction mechanism is attributed to the interaction between cellulose and Ca(OH)2to transform the carbon in cellulose into CaCO3, to which nickel works as catalyst. Accompanying the carbonate formation reaction, H2emission occurs correspondingly. This process offers a new approach to produce H2gas from the renewable biomass sources.
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Physical and Theoretical Chemistry