Journal Article10.1016/J.PMATSCI.2019.04.003
Catalytic materials based on silica and alumina: Structural features and generation of surface acidity
93
TL;DR: The structural, surface chemical and catalytic properties of the materials belonging to the SiO2 Al2O3 system are reviewed critically in this article, where amorphous silicas, transitional aluminas, different silica-aluminas (silica-rich and alumina-rich) and protonic zeolites are taken into consideration.
read more
About: This article is published in Progress in Materials Science. The article was published on 01 Jul 2019. The article focuses on the topics: Amorphous solid & Catalysis.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
On the structure of γ-Al2O3
TL;DR: The structure of γ-Al2O3, the most important catalyst support, is still under discussion; especially the positions of the Al3+cations and vacancies are debated as discussed by the authors.
148
Molecular Views on Mechanisms of Brønsted Acid-Catalyzed Reactions in Zeolites.
TL;DR: In this article , a review of the mechanisms of generic transformations catalyzed by Brønsted acid sites of zeolites, combining the information gained from advanced kinetic analysis, in situ, and operando spectroscopies, and quantum chemistry calculations, is presented.
75
A new generation low-cost biochar-clay composite ‘biscuit’ ceramic filter for point-of-use water treatment
Nhamo Chaukura,Nhamo Chaukura,Robert Chiworeso,Willis Gwenzi,Machawe M. Motsa,Wisdom A. Munzeiwa,Welldone Moyo,Innocent Chikurunhe,Thabo T.I. Nkambule +8 more
TL;DR: In this paper, a biochar-clay composite ceramic filter (BCF) was fabricated from clay and sawdust, and the control (CF) from clay only, and its performance was comparable to the sand filtration stage at a local water treatment plant.
61
Reutilization of silicon- and aluminum- containing wastes in the perspective of the preparation of SiO2-Al2O3 based porous materials for adsorbents and catalysts.
TL;DR: It is concluded that mesoporous materials can be prepared from wastes, but care to product quality and to overall process efficiency is needed.
55
Beyond γ-Al2O3 crystallite surfaces: The hidden features of edges revealed by solid-state 1H NMR and DFT calculations
Ana Teresa Fialho Batista,Dorothea Wisser,Dorothea Wisser,Thomas Pigeon,David Gajan,Fabrice Diehl,Mickael Rivallan,Leonor Catita,Anne Lesage,Céline Chizallet,Pascal Raybaud +10 more
TL;DR: In this article, the structural and spectroscopic features of edge sites are unravelled thanks to density functional theory (DFT) calculations combined with high field 1H MAS NMR of two high surface area alumina samples exhibiting distinct morphologies.
52
References
Aluminum in mesoporous silica–alumina
TL;DR: In this paper, triple-quantum spectroscopy was used to examine the aluminum nuclei in mesoporous silica-alumina (MSA) and revealed large amounts of AlO 6 sites (ca. 40% mole).
19
The nature of hydrogen in γ-alumina
TL;DR: In this article, Gibbs free energy models are derived from the calculated electronic and phonon structure of two possible models of γ-alumina, a defective spinel phase and a hydrogenated spinels phase.
19
Conversion of spent solid phosphoric Acid catalyst to environmentally friendly fertilizer.
TL;DR: Toxicity characteristic leaching tests of the spent catalyst fertilizer showed low levels of metals and organics, establishing that no harmful compounds are likely to be absorbed into plant life or groundwater.
19
Kinetic and Modeling Study of the Ethylene Oxychlorination to 1,2-Dichloroethane in Fluidized-Bed Reactors
TL;DR: In this paper, the authors presented a new kinetic model for the ethylene oxychlorination reaction, relying on 9 chemical reactions to describe the evolution of 12 species (including 6 major byproducts) in a set of 28 kinetic runs over a commercial CuCl2/γ-Al2O3 catalyst in a dedicated tubular flow reactor setup operating in a chemical regime.
19