A Mechanochemical Approach to Generate Hydrogen from Cellulose

作者：Zhang Qiwu^*; Honda Itaru; Watanabe Asuka; Tongamp William; Kang Incheol; Saito Fumio

来源：High Temperature Materials and Processes, 2010, 29(5-6): 435-445.

• hydrogen
• cellulose
• biomass
• carbonation
• mechanochemical

Cellulose [C(6)(H(2)O)(5)] was co-ground with calcium (Ca(OH)(2)) and nickel (Ni(OH)(2)) hydroxides, followed by heating the ground samples up to 1000 degrees C for determination of temperature range at which hydrogen (H(2)) gas can be generated. The results showed that the main gaseous products were; H(2), CH(4), H(2)O, CO, and CO(2) with H(2) as the dominant gas generated between 350 and 550 degrees C. Analyses of the gaseous products by TG-MS and gas-chromatography, and solid products by TG-DTA and XRD showed that CO(2) gas was fixed as CaCO(3) at temperatures between 350 to 600 degrees C allowing generation of H(2) gas with concentrations ranging from 90 to 99% with carbon oxide (CO, CO(2)) concentrations less than 1%. A plausible reaction mechanism is attributed to the interaction between cellulose and Ca(OH)(2) to transform the carbon in cellulose into CaCO(3), to which nickel works as catalyst. Accompanying the carbonate formation reaction, H(2) emission occurs correspondingly. This process offers a new approach to produce H(2) gas from the renewable biomass sources.

• 出版日期2010