Influence of palygorskite on in-situ thermal behaviours of clay mixtures and properties of fired bricks

Wang, Sen; Gainey, Lloyd; Wang, Xiaodong

doi:10.1016/j.clay.2021.106384

Cited by 14 publications

(1 citation statement)

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“…According to previous studies, quartz is generally considered to be an inert material and has no almost influence on catalytic performance (Zou et al , 2017). The peaks at 8.6 and 34.9°2θ were attributed to palygorskite in raw FePal (Wang et al , 2022), while these reflection peaks almost disappeared after calcination at high temperature, indicating that the structure of Pal was destroyed (Chen et al , 2011). Although a certain amount of iron existed in FePal, no independent phases of iron oxides were observed.…”

Section: Resultsmentioning

confidence: 99%

High catalytic performance of Fe-rich palygorskite clay-supported Ni catalysts for steam reforming of toluene

Zou

Liu

et al. 2023

Clay miner.

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The development and application of Fe-rich palygorskite clay has been restricted significantly by its red colour and low grade. Moreover, the nano-structured properties of palygorskite and the relatively large Fe content of Fe-rich palygorskite clay have received insufficient attention. The present study involved the synthesis of Ni-based catalysts via a coprecipitation method using Fe-rich palygorskite clay as the support. The catalysts were then evaluated for their performance for catalytic steam reforming of toluene (CSRT). The experimental findings revealed that the Fe in Fe-rich palygorskite clay interacted strongly with Ni and formed Fe-Ni alloys. The catalyst with a Ni/Fe mass ratio of 14 (Ni 14 /FePal) calcined in air at 600°C exhibited superior performance for CSRT under the reaction temperature 700°C and S/C molar ratio of 1.0. According to the kinetics study, Ni 14 /FePal exhibited the lowest apparent activation energy (33.99 kJ mol −1 ) among the catalysts, which further confirmed the superior catalytic activity in CSRT. The characterizations of the catalysts used demonstrated that the excellent stability and resistance to coke formation of Ni 14 /FePal were attributable to the presence of a sufficient amount of highly dispersed Fe-Ni alloys on its surface.

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Section: Resultsmentioning

confidence: 99%