High performance Ni-based porous catalytically activated absorbers and establishment of kinetic model for complex solar methane dry reforming reaction system

High performance Ni-based porous catalytically activated absorbers (PCAA) was prepared and experimentally studied for methane dry reforming reaction. Effects of critical operating parameters were discussed to disclose their influence on variation trends of outlet composition of each species. With experimental results, kinetic models of PCAAs for the complex methane dry reforming reaction were extracted by using plug flow model, nonlinear least squares fitting method as well as genetic algorithm. It was found that (1) High CO₂/CH₄ ratio is beneficial to increase CH₄ conversion and CO/H₂ selectivities; (2) High temperature condition would increase conversions of CH₄ and CO₂, but decrease CO selectivity; (3) The increase of molar flow rate would decrease CH₄ conversion & CO/H₂ selectivities, and increase CO₂ conversion; (4) Compared to other reported models, the established kinetic models can predict the outlet molar fractions of species well, showing great potential for the design and optimization of PCAA-type solar reactor.