Steam reforming kinetics of olefins and aromatics over Mn-Cr-O spinel oxides

Turning hazardous volatile matter compounds into fuel by catalytic steam reforming: An evolutionary machine learning approach

“…Increasing reaction time can reduce the catalyst activity by promoting pore blockage, coke deposition, and sintering over the catalyst (Artetxe et al, 2016;Ren et al, 2021). It should be noted that proper selection of reaction time can facilitate the tar catalytic steam reforming process by providing sufficient apparent activation energy required to perform reforming reactions (Gai et al, 2015;Yang et al, 2021) To quantitatively understand the relationship and provide simple instructions in selecting proper conditions in toluene catalytic steam reforming, joint distributions using kernel density estimation for important features and output targets were explored (Figure 7). As shown in Figure 7, higher toluene conversion rates (higher than 80%) are achieved when the reaction temperature is above 650°C and the reaction time is lower than 200 min.…”

Recent advances and future challenges in the catalytic combustion of light hydrocarbon VOCs

“…Therefore, most of the research on spinel catalysts is devoted to AB 2 O 4 -type composite metal spinel oxides. 4,24,[156][157][158] For AB 2 O 4 -type spinel catalysts, it is generally believed that B 3+ metal ions are the main catalytic activity centers, and their electronic properties directly affect the catalytic performance of the catalysts. Wang 11(a).…”

“…77 Likewise, the catalytic combustion of light hydrocarbons over metal oxide catalysts with high oxygen storage capacity and strong oxygen activation ability, such as Mn-based catalysts, Co-based catalysts, and so on, also mostly follows the MvK mechanism. 83,112,133,135,137,158,174,175 Yang et al…”

“…Therefore, most of the research on spinel catalysts is devoted to AB 2 O 4 -type composite metal spinel oxides. 4,24,156–158 For AB 2 O 4 -type spinel catalysts, it is generally believed that B 3+ metal ions are the main catalytic activity centers, and their electronic properties directly affect the catalytic performance of the catalysts. Wang et al introduced different contents of Ni into ZnCo 2 O 4 spinel to replace Co in octahedral coordination for modulating electrical properties of B-site metals.…”

“…77 Likewise, the catalytic combustion of light hydrocarbons over metal oxide catalysts with high oxygen storage capacity and strong oxygen activation ability, such as Mn-based catalysts, Co-based catalysts, and so on, also mostly follows the MvK mechanism. 83,112,133,135,137,158,174,175 Yang et al reported that the catalytic combustion of alkenes and aralkenes on Mn–Cr–O spinel oxides followed the MvK mechanism. 158 Li et al suggested that the catalytic combustion of propane molecules over Co 3 O 4 catalysts with different morphologies followed the MvK mechanism, and the oxygen vacancies on the catalysts facilitated the activation of molecular oxygen and the migration of lattice oxygen.…”