Highly Efficient Synthesis of High‐Value Olefins from Syngas over Layered Fe‐Mn/Magadiite Catalyst

Xue, Shujie; Song, Wenlong; Wang, Kangzhou; Zhu, Rui; Zhang, Xingjun; Yang, Xiaojiao; Bae, Jong Wook; Gao, Xinhua; Ma, Qingxiang; Zhang, Jianli; Zhao, Tiansheng

doi:10.1002/ceat.202200533

Cited by 3 publications

(1 citation statement)

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“…Owing to the interesting and attractive properties originated from the ease exchange of the hydrated sodium cations, and to the reactivity of the interlayer silanol groups, the modification of the interlayer space with different molecules was explored in different aims [4]. Compared to natural clay minerals, magadiite exhibits a negatively layered silicate structure, with a reasonably high cation exchange capacity and a layer charge density ranging from 200 to 250 meq/100 g [5,6].…”

Section: Introductionmentioning

confidence: 99%

Parameters Synthesis of Na-Magadiite Materials for Water Treatment and Removal of Basic Blue-41: Properties and Single-Batch Design Adsorber

Alanazi,

Al Dmour,

Popoola

et al. 2023

Inorganics

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Na-magadiite materials were prepared from a gel containing a silica source, sodium hydroxide, and water via hydrothermal treatment at different temperatures (130 °C to 170 °C) and periods of time (1 day to 10 days). In this study, four silica sources were selected (fumed silica, colloidal silica, Ludox HS-40%, and Ludox AS-40%). Variable conditions such as sodium hydroxide and water contents were explored at a specific temperature and reaction time. The obtained materials were characterized by using X-ray diffraction (XRD), thermogravimetry differential thermal analysis TG-DTA, scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), Fourier Transform Infrared spectroscopy (FTIR), solid 29Si magic angle spinning magnetic nuclear resonance (MAS MNR, and nitrogen adsorption isotherms. A pure Na-magadiite phase was obtained from the four silica sources at a synthesis temperature of 150 °C after a period of one to two days with a characteristic basal spacing of 1.54 nm. At a longer reaction time of 3 days and a higher temperature of 170 °C, Na-kenyaite with a basal spacing of 2.01 nm was achieved, in addition to a quartz phase. The content of water or sodium hydroxide in the gel affected the nature of the prepared phases. A cauliflower-like morphology was obtained from colloidal silica sources, while a different morphology was achieved using solid fumed silica. The 29Si solid NMR confirmed the presence of Q3 and Q4 silicon sites in the Na-magadiite materials. The optimal Na-magadiite materials at 150 °C for 2 days were assessed for their ability to remove Basic Blue-41 dye from artificially contaminated aqueous solution. The Langmuir equation was used to estimate the maximum removal capacity. A maximum removal capacity of 219 mg/g was achieved using Na-magadiite prepared from a Ludox-HS40% silica source, and a maximum removal capacity of 167 mg/g was observed for Na-magadiite prepared from fumed silica. Basic Blue-4’s removal percentage was enhanced at basic pH levels (8 to 10) to a maximum of 95%. These materials could be regenerated for seven cycles of reuse with a reduction of 27 to 40% of the original values. Therefore, Na-magadiite materials are promising and efficient removal agents for the removal of Basic Blue-41 from effluents.

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Section: Introductionmentioning

confidence: 99%