Production of Hydrogen and Solid Carbon by Methane Decomposition under Pressurized Conditions Using a Rotary Reactor and Purification of Yielded Hydrogen by Hydrogen Separation Membrane

• DOI: 10.1021/acs.iecr.3c03696
• Publication Date: 2024-02-28T04:46:08Z
• Authors: Megumu Inaba; Koji Kuramoto; Yasushi Soneda
• Keywords: Membrane reactor; Hydrogen purifier; Carbon fibers; Methanation

A pressurized rotary reactor was used to produce hydrogen and solid carbon through thermochemical decomposition of methane using an Fe catalyst. Here, the ratio (CH4 flow rate)/pressure kept constant. Pressurized conditions caused a lower initial conversion, but decrease in conversion over time suppressed, ultimately higher than that at ambient pressure after long reaction time. The deposited formed as nanofibers nano-onions. At pressure, crystallinity also slightly increased. Unreacted methane, CO, CO2 may coexist exhaust gas addition product hydrogen. In this study, purification carried out by introducing obtained from 5 atm directly into commercially available separation membrane.