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Spatial Confinement Effects of Microcapsule Catalyst for Improved Coking‐ and Sintering‐Resistant Behaviors Toward CO 2 Reforming of Methane Reaction
Author(s) -
Han Bing,
Amoo Cederick Cyril,
Zhang Guihua,
Cheng Shilin,
Mazonde Brighton,
Javed Mudassar,
Gai Xikun,
Lu Chengxue,
Yang Ruiqin,
Xing Chuang
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201801033
Subject(s) - syngas , catalysis , carbon dioxide reforming , materials science , sintering , chemical engineering , methane , thermogravimetry , differential scanning calorimetry , metallurgy , chemistry , organic chemistry , physics , engineering , thermodynamics
The CO 2 dry reforming of methane (DRM) reaction is an important technology with high prospects to reduce greenhouse gas emissions while simultaneously producing syngas for industrial usage. To date, the lack of an effective catalyst for the reaction has inhibited its commercialization. The coking and sintering behaviors of the catalysts are key factors for commercial production of syngas from DRM reaction. A microcapsule catalyst prepared by sol–gel method with Ni/ZSM‐5 as core and amorphous SiO 2 as shell is successfully synthesized. The characterizations of the catalysts are analyzed using X‐ray powder diffraction (XRD), transmission electron microscopy (TEM), H 2 temperature programmed reduction (H 2 ‐TPR), NH 3 temperature programmed desorption (NH 3 ‐TPD), and thermogravimetry & differential scanning calorimetry (TGA‐DSC). The spatial confinement of the Ni metal particles between the SiO 2 shell and ZSM‐5 suppresses Ni particles aggregation by strengthening the interaction between Ni particles and ZSM‐5 core. The coking‐resistant ability is equally improved. The capsule catalysts isolate the contact between the carbon deposits and the nickel active centre, thus improving the activity of the catalysts. 10Ni/ZSM‐5@SiO 2 emerged superior in activity in comparison to other catalysts.