Analysis and interpretation of acidic nature of aluminosilicates

Katada, Naonobu

doi:10.1016/j.mcat.2017.12.024

Cited by 25 publications

(12 citation statements)

References 118 publications

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“…Besides, the desorbed probe molecules can get re-adsorbed while they are coming out of the pores and thus can affect the final results [103]. TPD technique has been upgraded by developing an NH3 IRMS-TPD (infrared/mass spectroscopy TPD) method based on the operando instrumentation setup, which allowed to ascertain the nature of acid sites (Figure 10) [104].…”

Section: Zeolites' Acidity Assessment By Probe Moleculesmentioning

confidence: 99%

Analysis and control of acid sites in zeolites

Palčić

Valtchev

2020

Applied Catalysis A: General

118

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The exceptional catalytic performance of zeolites is due to the presence of active sites in a shape-selective environment, i.e., in micropores with molecular dimensions. The present review provides a comprehensive analysis of active sites in zeolite frameworks. It is focused on the active sites generated by the Al incorporation in the framework. The inclusion of other heteroatoms in the zeolite framework is also addressed. After the introduction of zeolite-type materials and a discussion of the structure-properties relationship in zeolites the central part of the review is devoted to i) the analytical methods and their complementarity for the evaluation of the number, strength, and position of active sites and ii) the in situ and post-synthesis methods of acid sites assessment and control. The data presented herein provide guidelines for making zeolite materials by design in terms of acidity.

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Section: Zeolites' Acidity Assessment By Probe Moleculesmentioning

confidence: 99%

Analysis and control of acid sites in zeolites

Palčić

Valtchev

2020

Applied Catalysis A: General

118

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“…274 The in situ IR and TPD techniques can also be combined into so called IRMS-TPD providing a deep understanding of the surface processes as well as quantitative information. 275,276 The choice of the probe molecule determines the information possible to obtain similarly to Hammett indicators used to estimate acid strength in non-aqueous media (i.e. in homogeneous catalysis).…”

Section: Active Sites In 2d Zeolitesmentioning

confidence: 99%

From 3D to 2D zeolite catalytic materials

et al. 2018

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Research activities and recent developments in the area of three-dimensional zeolites and their two-dimensional analogues are reviewed. Zeolites are the most important industrial heterogeneous catalysts with numerous applications. However, they suffer from limited pore sizes not allowing penetration of sterically demanding molecules to their channel systems and to active sites. We briefly highlight here the synthesis, properties and catalytic potential of three-dimensional zeolites followed by a discussion of hierarchical zeolites combining micro- and mesoporosity. The final part is devoted to two-dimensional analogues developed recently. Novel bottom-up and top-down synthetic approaches for two-dimensional zeolites, their properties, and catalytic performances are thoroughly discussed in this review.

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“…All these techniques have their own advantages and disadvantages, which can be overcome by piecing the information together. An elegant solution from the zeolite world is IRMS-TPD (Infrared mass spectrometry -temperature programmed desorption), [214][215][216][217] which combines many techniques. Here ammonia-doped solid acid materials undergo TPD-MS (temperature programmed desorption -mass spectrometry), whilst the IR spectra is recorded every 10 o C. In doing so one can resolve features due to each distinct active site and quantify the ammonia desorption enthalpy for each.…”

Section: Methods To Probe the Acid Strength Of Saposmentioning

confidence: 99%

“…Though this technique has only been applied to SAPO-34 it surely will provide a wealth of information on a wide range of systems. [214][215][216][217]…”

Section: Methods To Probe the Acid Strength Of Saposmentioning

confidence: 99%

Down the Microporous Rabbit Hole of Silicoaluminophosphates: Recent Developments on Synthesis, Characterization, and Catalytic Applications

Potter

2020

ACS Catal.

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Word 2010, single-column, double-spaced (2013)This template is a guide to be used to prepare manuscripts for submission. Please consult the Instructions to Authors or a recent issue of the journal for detailed guidelines and procedures for submission. This template is intended to benefit to the author in that the entire manuscript (text, tables, and graphics) may be submitted in one file. Inserting graphics and tables close to the point at which they are discussed in the text of the manuscript can also be a benefit for the reviewer.When you submit a manuscript using this template, you will not actually see the page formatting that appears in the printed journal. This will occur as part of the editorial production process. Abbreviated instructions for using the template follow. Consult the documentation for your specific application and version for more information. Additional instructions can be found in the readme file at the web page where you downloaded this template. Using the templateIn ACS publications there are many different components of a manuscript (i.e., title, abstract, main text, figure captions, etc.) that are represented in the template. See the Guide, Notes, Notice, or Instructions for Authors on the journal's homepage to determine which parts should be included for the manuscript that you are preparing 1. If typing your manuscript directly into the template, select (highlight) the text of the template that you want to replace and begin typing your manuscript (i.e., select the Title section for typing in your title).2. If you have already prepared your document in a Word file, you will need to attach the template to your working document in order to apply the Word Style tags. Further instructions can be found in the readme file at the web page where you downloaded this template.a. Go to the Add-Ins tab and you will see all the Word Styles from the template that has now been imported into the current document. A Styles toolbar has been generated that will display the different Styles for you to choose from. If this is not present, type in the following command (Alt+Ctrl+Shift+S) and it should appear. You can close this at any time and then reopen it when needed.b. Click in the sentence or paragraph and then go to the Add-Ins tab and select the relevant Word Style. This will apply the Word Style to the entire text (sentence or paragraph). Do this for all sections of the manuscript.3. To insert graphics within the text or as a figure, chart, scheme, or table, create a new line and insert the graphic where desired. If your graphic is not visible, ensure that the Word Style is "Normal" with an automatic height adjustment. If the size of the artwork needs to be adjusted, re-size the artwork in your graphics program and re-paste the artwork into the template (maximum width for single-column artwork, 3.3 in. (8.5 cm); maximum width for double-column artwork, 7 in. (17.8 cm)). NOTE: If you are submitting a Table of Contents graphic, please insert the graphic at the end of the file.4. Ensure that page numb...

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Analysis and interpretation of acidic nature of aluminosilicates

Cited by 25 publications

References 118 publications

Analysis and control of acid sites in zeolites

Analysis and control of acid sites in zeolites

From 3D to 2D zeolite catalytic materials

Down the Microporous Rabbit Hole of Silicoaluminophosphates: Recent Developments on Synthesis, Characterization, and Catalytic Applications

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