Insights on the Highly Stable and Coke-Resistant Nickel/Zirconia Nanocatalyst for the Methanation of Carbon Dioxide

Highly Active and Anticoke Fibrous Silica-Supported Nickel Catalyst for CO2 Methanation

“…H 2 -TPR analysis results also indicated that Ni/KCC-1 catalysts have superior reduction properties, with reduction degrees (γ Ni ) reaching 60.6–71.6%. This reduction degree is much higher than that of the Ni/ZrO 2 catalyst (36–52%) and Ni/r-CeO 2 (26–42%)…”

“…H 2 -TPR analysis results also indicated that Ni/KCC-1 catalysts have superior reduction properties, with reduction degrees (γ Ni ) reaching 60.6−71.6%. This reduction degree is much higher than that of the Ni/ZrO 2 catalyst (36−52%) 41 and Ni/r-CeO 2 (26−42%). 42 The reduction temperature range of the Ni/KCC-1 catalyst in this study was as low as that of the 5% Ni/KCC-1 catalyst found by Shahul Hamid et al, 28 within the range of 200−500 °C, and lower than that in another study 12 (range of 350−600 °C).…”

“…The amount of coke accumulated on the 25Ni/KCC-1 catalyst was much lower than that of several Ni-based catalysts. There was 2.041% coke deposition after 100 h on stream of CO 2 methanation at 400 °C on 10Ni/ZrO 2 and 5% coke formation after 40 h TOS at 400 °C on 10%Ni@HZSM-5 . The β-carbon (C β ) and C γ -carbon (C γ ) species, which burned at temperatures above 450 °C, can be derived from CO in the Boudouard reaction (eq ).…”