Development and characterization of an impedance-based carbon sensor for the detection of catalyst coking in steam-methane and dry-methane reforming systems
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A carbon sensor designed to detect the early stages of catalyst coking in methane reforming systems has been developed. The sensor is similar to the one developed by Wheeler et al., but it has been redesigned to reduce unwanted gas-phase response and increase coking response in methane reforming environments. The sensor comprises of a Wheatstone bridge with two catalytic, non-percolating cermet resistive elements printed using an inkjet printer. As carbon begins to grow on the catalytic surface, the electrical conductivity of the catalytic material increases, which results in a change in the ...