NDLI: Sol–gel derived mesoporous Cr/Al$_{2}$O$_{3}$ catalysts for SCR of NO by ammonia

Please wait, while we are loading the content...

Preparation, characterization and mechanical properties of controlled porous gelatin/hydroxyapatite nanocomposite through layer solvent casting combined with freeze-drying and lamination techniques

Synthesis, characterization and catalytic activity of metallosalens and metallocalixpyrroles encapsulated in Y and MCM-41 molecular sieves

Preparation of binderless honeycomb silicalite-1 monolith by using bundled palm fibers as template

Study the liquid-phase Beckmann rearrangement on the surface of SBA-15-SO$_{3}$H catalyst

Tuning mesoporous molecular sieve SBA-15 for the immobilization of α-amylase

Sorption of platinum and rhodium on carbon adsorbents from chloride solutions

Recycling of waste glasses into partially crystallized glass foams

Degradation of basic blue 9 dye by CoS/nanoAlMCM-41 catalyst under visible light irradiation

Surface and pore structure of alumina derived from xerogel/aerogel

Journal of Porous Materials : Volume 17, Issue 2, April 2010

Journal of Porous Materials : Volume 17, Issue 1, February 2010

Journal of Porous Materials : Volume 16

Journal of Porous Materials : Volume 15

Journal of Porous Materials : Volume 14

Journal of Porous Materials : Volume 13

Journal of Porous Materials : Volume 12

Journal of Porous Materials : Volume 11

Journal of Porous Materials : Volume 10

Journal of Porous Materials : Volume 9

Journal of Porous Materials : Volume 8

Journal of Porous Materials : Volume 7

Journal of Porous Materials : Volume 6

Journal of Porous Materials : Volume 5

Journal of Porous Materials : Volume 4

Sol–gel derived mesoporous Cr/Al$_{2}$O$_{3}$ catalysts for SCR of NO by ammonia

Content Provider	Springer Nature Link
Author	Ayari, F. Mhamdi, M. Delahay, G. Ghorbel, A.
Copyright Year	2009
Abstract	Catalytic performances of Cr/Al$_{2}$O$_{3}$ catalysts were investigated in Selective Catalytic Reduction (SCR) of NO by NH$_{3}$ in the presence of oxygen. Solids were prepared either by sol–gel method or by impregnation and were characterized by different techniques such as chemical analysis, N$_{2}$ physisorption, XRD, $^{27}$Al MAS NMR, DRIFT, UV–Vis Diffuse Reflectance (DRS), Raman Spectroscopy and Temperature Programmed Reduction by H$_{2}$ (H$_{2}$-TPR). The physisorption of N$_{2}$ at 77 K reveals that solids are mesoporous. On the other hand, XRD shows that xerogels are amorphous but supercritical drying leads to a nanosized crystallite state. No crystalline α-Cr$_{2}$O$_{3}$ was found which indicate that metal species reside essentially on the surface of Al$_{2}$O$_{3}$ and their size measured less than 4 nm. Furthermore, $^{27}$Al MAS NMR reveals that part of chromium ions occupies sites on/in Al$_{2}$O$_{3}$ in close vicinity of tetrahedral $^{27}$Al. This, apparently, is not the case for aerogels. DRIFT results show that there is a consumption of hydroxyl groups of alumina after calcination. The esterification reaction between hydroxyl groups and chromium oxide during calcination leads to the formation of anchored (poly-)chromates according to DRS, Raman, and H$_{2}$-TPR results. The catalysts are active in the studied reaction by NH$_{3}$ and the activity is principally governed by preparation method and operating conditions. When compared to xerogels, aerogels are more active in NO reduction and less selective toward N$_{2}$O. Preparation method and drying mode seem to involve the predominance of active species which are essentially mono and polychromates but Cr$^{3+}$ ions incorporated inside alumina seem to be inactive.
Starting Page	265
Ending Page	274
Page Count	10
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	17
Issue Number	3
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2009-05-18
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chromium Alumina Sol–gel SCR of NO by NH$_{3}$ Physical Chemistry Characterization and Evaluation of Materials Catalysis
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Selective catalytic reduction of NO with NH$_{3}$ over sol-gel-derived CuO-CeO$_{2}$-MnO$_{ x }$/γ-Al$_{2}$O$_{3}$ catalysts

Non-hydrolytic Sol–Gel Preparation of Silver Alumina Based Catalysts for the HC-SCR of NOx

The electrospun mesoporous Al$_{2}$O$_{3}$ and mesoporous Au–Al$_{2}$O$_{3}$ nanofiber catalyst

Effect of p-aminobenzoic acid on synthesizing ordered mesoporous alumina via the sol–gel method

Catalytic Properties of CuO/Al$_{2}$O$_{3}$-Based Microreactors in SCR of NO$_{x}$ with NH$_{3}$

NO reduction with CO on Cu–Cr and Co–Cr oxide catalysts supported on Al$_{2}$O$_{3}$ and Al$_{2}$O$_{3}$ + SiO$_{2}$

Synthesis of Alumina Aerogels by Ambient Drying Method and Control of Their Structures

Tailored mesoporous alumina prepared from different aluminum alkoxide precursors

Alkali Resistant Fe-Zeolite Catalysts for SCR of NO with NH$_{3}$ in Flue Gases

Sol–gel derived mesoporous Cr/Al$_{2}$O$_{3}$ catalysts for SCR of NO by ammonia

Similar Documents

Selective catalytic reduction of NO with NH$_{3}$ over sol-gel-derived CuO-CeO$_{2}$-MnO$_{ x }$/γ-Al$_{2}$O$_{3}$ catalysts

Non-hydrolytic Sol–Gel Preparation of Silver Alumina Based Catalysts for the HC-SCR of NOx

The electrospun mesoporous Al$_{2}$O$_{3}$ and mesoporous Au–Al$_{2}$O$_{3}$ nanofiber catalyst

Effect of p-aminobenzoic acid on synthesizing ordered mesoporous alumina via the sol–gel method

Catalytic Properties of CuO/Al$_{2}$O$_{3}$-Based Microreactors in SCR of NO$_{x}$ with NH$_{3}$

NO reduction with CO on Cu–Cr and Co–Cr oxide catalysts supported on Al$_{2}$O$_{3}$ and Al$_{2}$O$_{3}$ + SiO$_{2}$

Synthesis of Alumina Aerogels by Ambient Drying Method and Control of Their Structures

Tailored mesoporous alumina prepared from different aluminum alkoxide precursors

Alkali Resistant Fe-Zeolite Catalysts for SCR of NO with NH$_{3}$ in Flue Gases

Sol–gel derived mesoporous Cr/Al$_{2}$O$_{3}$ catalysts for SCR of NO by ammonia