(617de) Hotspot Mitigation in an Annular Microchannel Reactor (AMR) for Hydrogen and/or Syn Gas Production
AIChE Annual Meeting
2016
2016 AIChE Annual Meeting
Catalysis and Reaction Engineering Division
Poster Session: Catalysis and Reaction Engineering (CRE) Division
Wednesday, November 16, 2016 - 6:00pm to 8:00pm
This study focuses on a way to mitigate local hotspot formation when coupling methane steam reforming with catalytic methane combustion in a heat-exchanger microreactor. Previous studies have shown that the annular microchannel reactor (AMR), originally developed by Power + Energy, can be powered by catalytic combustion of methane achieving up to 67% overall thermal efficiency. However, hotspot formation was found to be an issue for catalyst stability. The addition of reforming catalyst to the inlet region of the AMR acts as a reaction heat sink providing hotspot control and adding further reforming capacity. Different catalyst thicknesses ranging from 30-60 microns were used and catalyst length ranged from 10-30 mm. The additional catalyst results in a temperature drop of over 100°C at the inner wall of the annulus, as well as lowering peak temperature in the reactor by over 70°C. Despite the temperature drop, the reactor performance is maintained.