Hydrogen production by methane decomposition over pure silica SBA-15 materials

作者：Gomez Gema; Angel Botas Juan; Serrano David P; Pizarro Patricia

来源：Catalysis Today, 2016, 277: 152-160.

DOI：10.1016/j.cattod.2015.12.007

• Hydrogen
• Methane
• Catalytic
• Decomposition
• SBA-15

The effect of the synthesis procedure of SBA-15 on its catalytic behavior in methane decomposition (DeCH(4)) for hydrogen production has been investigated. Three different SBA-15 materials have been synthesized: SBA-15 (C), by a conventional method with a final calcination step; SBA-15 (MW), replacing the calcination by microwave digestion; and SBA-15 (ULP), using a micelle expander to generate ultra large pores. All SBA-15 samples exhibit a reaction induction time necessary for the formation of Si-C linkages associated with the creation of active sites. After a sharp decay of the reaction rate due to the appearance of mass transfer limitations, all the SBA-15 materials reach a quasi-stationary state which is maintained during the rest of the reaction time tested (24 h). The long-term activity is mainly due to fact that the carbon deposits grow towards the outer part of the SBA-15 particles, keeping part of the active sites accessible to methane molecules. Among the materials tested, SBA-15

• 出版日期2016-11-15