45 Preparation of copper-loaded MFI zeolites by solid-state ion exchange method and their catalytic activity for direct NO decomposition

2003 ◽  
pp. 231-234
Author(s):  
Yasutake Teraoka ◽  
Hiroshi Furukawa ◽  
Isamu Moriguchi
Keyword(s):  
Catalytic Activity ◽  
Solid State ◽  
Ion Exchange ◽  
No Decomposition ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Mfi Zeolites

Insights into the catalytic activity of Ru/NaY catalysts for efficient H2 production through aqueous phase reforming

2020 ◽  
Vol 4 (2) ◽  
pp. 678-690 ◽  
Author(s):  
Pranjal Gogoi ◽  
Atul S. Nagpure ◽  
Prabu Kandasamy ◽  
C. V. V. Satyanarayana ◽  
Thirumalaiswamy Raja
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Aqueous Phase ◽  
H2 Production ◽  
Zeolite Catalysts ◽  
Nay Zeolite ◽  
Ruthenium Nanoparticles ◽  
Exchange Method ◽  
Aqueous Phase Reforming ◽  
Ion Exchange Method

Ruthenium nanoparticles supported on NaY zeolite catalysts were synthesized by a simple ion exchange method.

Preparation of caesium-substituted phosphomolybdic acid via solid-state ion exchange method

2013 ◽  
Vol 246 ◽  
pp. 643-649 ◽  
Author(s):  
Bahaa M. Abu-Zied ◽  
Abeer A.A. Farrag ◽  
Abdullah M. Asiri
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Phosphomolybdic Acid ◽  
Exchange Method ◽  
Ion Exchange Method

scholarly journals Investigation of Butane-butylene Technical Mixtures Transformation Over Modified Microporous Materials Prepared by Ion Exchange Method Into Liquid Fraction Rich in Aromatic Hydrocarbons

2019 ◽  
Vol 70 (6) ◽  
pp. 2004-2009
Author(s):  
Iuliean Vasile Asaftei ◽  
Neculai Catalin Lungu ◽  
Maria Ignat ◽  
Ion Sandu
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Atmospheric Pressure ◽  
Liquid Fraction ◽  
Fixed Bed ◽  
Space Velocity ◽  
Exchange Method ◽  
Structure Morphology ◽  
Stainless Steel Reactor ◽  
Ion Exchange Method

The Zn and Ni were introduced into HZSM-5 zeolite by ion exchange method with aqueous solutions of Zn(NO3)2 and Ni(NO3)2, to investigate the catalytic activity and selectivity of modified Zn-HZSM-5 and Ni-HZSM-5 catalysts for conversion of butane-butylenes technical mixtures in a fixed-bed stainless-steel reactor (Twin Reactor System Naky) at 450�C, at atmospheric pressure for Zn-HZSM-5 and at 4 atm. total pressure for Ni-HZSM-5 and at a space velocity (WHSV) of 1h-1. The catalysts were characterized using XRD, SEM, and NH3-TPD analysis for their structure, morphology and acidity. The catalytic activity of the same catalyst were examined during over 10 catalytic tests (with regeneration of catalyst after each test) using mixtures of butanes-butylenes.

scholarly journals Synthesis and characterization of Cu-MFI catalyst for the direct medium temperature range NO decomposition

2016 ◽  
Vol 34 (1) ◽  
pp. 177-184 ◽  
Author(s):  
Karolina Maduna Valkaj ◽  
Vesna Tomašić ◽  
Andrea Katović ◽  
ElżBieta Bielańska
Keyword(s):  
Ion Exchange ◽  
Active Sites ◽  
Catalytic Properties ◽  
Direct Synthesis ◽  
Copper Acetate ◽  
Nitrogen Adsorption ◽  
No Decomposition ◽  
Medium Temperature ◽  
Exchange Method ◽  
Mfi Zeolites

AbstractIn this study the physico-chemical and catalytic properties of copper bearing MFI zeolites (Cu-MFI) with different Si/Al and Si/Cu ratios were investigated. Two different methods for incorporation of metal ions into the zeolite framework were used: the ion exchange from the solution of copper acetate and the direct hydrothermal synthesis. Direct synthesis of a zeolite in the presence of copper-phosphate complexes was expected to generate more active copper species necessary for the desired reaction than the conventional ion exchange method. Direct decomposition of NO was used as a model reaction, because this reaction still offers a very attractive approach to NOX removal. The catalytic properties of zeolite samples were studied using techniques, such as XRD, SEM, EPR and nitrogen adsorption/desorption measurements at 77 K. Results of the kinetic investigation revealed that both methods are applicable for the preparation of the catalysts with active sites capable of catalyzing the NO decomposition. It was found out that Cu-MFI zeolites obtained through direct synthesis are promising catalysts for NO decomposition, especially at lower reaction temperatures. The efficiency of the catalysts prepared by both methods is compared and discussed.

Synergy between vanadium and molybdenum in bimetallic ZSM-5 supported catalysts for ethylene ammoxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65866-65878 ◽  
Author(s):  
Baker Rhimi ◽  
Mourad Mhamdi ◽  
Venkata Narayana Kalevaru ◽  
Andreas Martin
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Supported Catalysts ◽  
Exchange Method ◽  
Ion Exchange Method

Ammoxidation of ethylene to acetonitrile was studied on V/ZSM-5, Mo/ZSM-5 and V–Mo/ZSM-5 catalysts prepared by a solid-state ion exchange method.

Characterization of Modified HZSM–5 with Gallium and its Reactivity in Direct Conversion of Methane to Liquid Hydrocarbons

2012 ◽  
Author(s):  
Nor Aishah Saidina Amin ◽  
Asmadi Ali
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Zeolite Catalyst ◽  
Nitrogen Adsorption ◽  
Direct Conversion ◽  
Liquid Hydrocarbons ◽  
Exchange Method ◽  
Conversion Of Methane ◽  
Ion Exchange Method

Mangkin zeolit HZSM–5 diubahsuai secara kaedah pertukaran ion berasid bagi menghasilkan mangkin zeolit Ga–HZSM–5. Aktiviti bermangkin bagi HZSM–5 dan Ga–HZSM–5 dikaji pada suhu tindak balas 800°C dan halaju ruang jaman masa (GHSV) 7500 jam–1. Mangkin HZSM–5 dan Ga–HZSM–5 dicirikan secara XRD, NMR, Penjerapan Nitrogen dan TPD. Hasil pencirian menunjukkan aluminium keluar dari kerangka asal. HZSM–5 yang mengandungi galium adalah mangkin yang lebih baik daripada mangkin zeolit HZSM–5 bagi menghasilkan cecair hidrokarbon. Kata kunci: Ga-HZSM-5; metana; pertukaran ion berasid; cecair hidrokarbon The HZSM–5 zeolite catalyst was modified by an acidic ion exchange method to produce the Ga–HZSM–5 zeolite catalyst. The catalytic activity of HZSM–5 and Ga–HZSM–5 were studied at reaction temperature of 800°C and gas hourly space velocities (GHSV) of 7500 hr–1. HZSM–5 and Ga–HZSM–5 catalysts were characterized by XRD, NMR, Nitrogen Adsorption and TPD. The characterization results revealed that aluminium was removed from the parent framework. Gallium loaded HZSM–5 is a better catalyst than HZSM–5 zeolite catalyst to produce liquid hydrocarbons. Key words: Ga-HZSM-5; methane; acidic ion exchange; liquid hydrocarbons

Selective Catalytic Reduction of NOxwith NH3over a Cu-SSZ-13 Catalyst Prepared by a Solid-State Ion-Exchange Method

ChemCatChem ◽  
2014 ◽  
Vol 6 (6) ◽  
pp. 1579-1583 ◽  
Author(s):  
Di Wang ◽  
Feng Gao ◽  
Charles H. F. Peden ◽  
Junhui Li ◽  
Krishna Kamasamudram ◽  
...  
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Exchange Method ◽  
Ion Exchange Method

scholarly journals Preparation of CuHY catalyst via solid-state ion exchange method and its catalytic performance in isobutane/2-butene alkylation

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 23045-23054
Author(s):  
Xinyan Sun ◽  
Xiang Zhang ◽  
Tao Zheng ◽  
Haiyan Liu ◽  
Rui Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Catalytic Performance ◽  
Exchange Method ◽  
Hy Zeolite ◽  
Ion Exchange Method

CuHY prepared by solid-state ion exchange of HY zeolite with CuCl was used as a catalyst in isobutane/2-butene alkylation. The selectivity of C8 and trimethylpentanes over CuHY in alkylate are improved compared with those of HY.

Sign in / Sign up

Export Citation Format

Share Document