Tailored activity of Cu–Fe bimetallic Beta zeolite with promising C3H6 resistance for NH3-SCR

2021 ◽  
Author(s):  
Qi Zhao ◽  
Bingbing Chen ◽  
Bolin Zou ◽  
Limei Yu ◽  
Chuan Shi
Keyword(s):  
Competitive Adsorption ◽  
Beta Zeolite ◽  
Nh3 Scr

The introduction of Cu has inhibited the polymerization of C3H6 and promoted the oxidation of C3H6, which alleviated competitive adsorption between C3H6 and NOx, therefore results in the enhanced NH3-SCR performance in the presence of C3H6.

Heat of adsorption for NH3, NO2 and NO on Cu-Beta zeolite using microcalorimeter for NH3 SCR applications

2010 ◽  
Vol 151 (3-4) ◽  
pp. 237-243 ◽  
Author(s):  
Norman Wilken ◽  
Krishna Kamasamudram ◽  
Neal W. Currier ◽  
Junhui Li ◽  
Aleksey Yezerets ◽  
...  
Keyword(s):  
Heat Of Adsorption ◽  
Beta Zeolite ◽  
Nh3 Scr

DFT insights into the adsorption of NH3-SCR related small gases in Mn-MOF-74

2016 ◽  
Vol 18 (41) ◽  
pp. 28854-28863 ◽  
Author(s):  
Minhua Zhang ◽  
Xuewei Huang ◽  
Yifei Chen
Keyword(s):  
Competitive Adsorption ◽  
Adsorption Properties ◽  
Nh3 Scr

The adsorption properties of six NH3-SCR related small gases and the competitive adsorption of NH3, SO2 and NH3, H2O were investigated.

scholarly journals Competitive Adsorption of Substrate and Solvent in Sn-Beta Zeolite During Sugar Isomerization

ChemSusChem ◽  
2016 ◽  
Vol 9 (22) ◽  
pp. 3145-3149 ◽  
Author(s):  
William N. P. van der Graaff ◽  
Christiaan H. L. Tempelman ◽  
Guanna Li ◽  
Brahim Mezari ◽  
Nikolay Kosinov ◽  
...  
Keyword(s):  
Competitive Adsorption ◽  
Beta Zeolite

scholarly journals Fe-doped Beta zeolite from organotemplate-free synthesis for NH3-SCR of NOx

2016 ◽  
Vol 6 (17) ◽  
pp. 6581-6592 ◽  
Author(s):  
Yongjun Zhu ◽  
Bingbing Chen ◽  
Rongrong Zhao ◽  
Qi Zhao ◽  
Hermann Gies ◽  
...  
Keyword(s):  
Beta Zeolite ◽  
Nh3 Scr ◽  
Scr Of Nox

Structure–performance correlations suggest that the content of isolated Fe3+ in the Beta zeolite affects the SCR activity directly.

A MnO2-based catalyst with H2O resistance for NH3-SCR: Study of catalytic activity and reactants-H2O competitive adsorption

2020 ◽  
Vol 270 ◽  
pp. 118860 ◽  
Author(s):  
Ningqiang Zhang ◽  
Lingcong Li ◽  
Yizhong Guo ◽  
Junda He ◽  
Rui Wu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Competitive Adsorption ◽  
Nh3 Scr

Rapid, Non-Toxic Synthesis of Beta Zeolites

2018 ◽  
Author(s):  
Felix Hemmann ◽  
Jonathan Hackebeil ◽  
Andreas Lißner ◽  
Florian Mertens
Keyword(s):  
Hydrofluoric Acid ◽  
Molecular Sieves ◽  
Toxic Chemicals ◽  
Lewis Acidity ◽  
Beta Zeolite ◽  
Seeded Growth ◽  
Related Research ◽  
Beta Zeolites ◽  
Growth Method ◽  
Fast Synthesis

Molecular sieves with beta zeolite topology are promising catalysts for various reactions as they exhibits extraordinary Lewis acidity. However, their industrial application and related research in academica is hindered because their synthesis is time consuming and typically involves toxic chemicals as hydrofluoric acid. Therefore, tetraethylammonium fluorid was tested as a non-toxic fluotide source for the synthesis of beta zeolites. In combination with the previously reported nano-seeded growth method, a fast synthesis of beta zeolites only involving non-toxic chemicals was possible. Synthesized zeolites show comparable selectivity in the Bayer-Villinger oxidation as conventional zeolites synthesized with hydrofluoric acid.<br>

PHYTOACCUMULATION, COMPETITIVE ADSORPTION AND EVALUATION OF CHELATORS-METAL INTERACTION IN LETTUCE PLANT

2014 ◽  
Vol 13 (10) ◽  
pp. 2583-2592 ◽  
Author(s):  
Beenish Saba ◽  
Audil Rashid ◽  
Tariq Mahmood ◽  
Faisal Mehmood ◽  
Azeem Khalid ◽  
...  
Keyword(s):  
Competitive Adsorption ◽  
Lettuce Plant ◽  
Metal Interaction

Competitive adsorption of organic solvents using modified and unmodified calcium bentonite clay mineral

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Adsorption Isotherm ◽  
Adsorption Capacity ◽  
Organic Solvents ◽  
Competitive Adsorption ◽  
Correlation Factor ◽  
Isotherm Model ◽  
Isotherm Models ◽  
High Concentration ◽  
Dual Purpose ◽  
Calcium Bentonite

Dodecyltrimethylammonium bromide (DTAB)–modified and unmodified calcium bentonite were both used for the competitive adsorption of aromatics (xylene, ethylbenzene and toluene) and petroleum products (gasoline, dual purpose kerosene and diesel) from their aqueous solution. Infrared spectroscopy (IR) and expansion tests (adsorption capacity and Foster swelling) measurement were performed in order to evaluate the performance of the adsorbents. The Foster swelling index and adsorption capacity of the DTAB modified calcium bentonite in the organic solvents follow the trend: xylene &gt; ethylbenzene &gt; toluene &gt; gasoline &gt; dual purpose kerosene (DPK) &gt; diesel &gt; water. However, the adsorption capacity of the adsorbent in diesel outweighed the adsorption capacity in DPK at high concentration of DTAB indicating that diesel has higher affinity for high DTAB concentration than DPK. The percentage removal of the solvent is directly proportional to the concentration of DTAB used in modifying the bentonite as well as the contact time between the adsorbent and the solvent, hence modified calcium bentonite adsorbed a higher percentage of organic solvents than the unmodified calcium bentonite. The adsorption characteristics of both adsorbents improved remarkably after proper agitation of the organic solvents, the unmodified calcium bentonite however adsorbed more water than the modified bentonite. Data obtained from adsorption isotherm models confirms that Freundlich adsorption isotherm model was favored more than Langmuir adsorption isotherm model with the correlation factor (R2) of the former tending more towards unity. The adsorption of ethylbenzene using DTAB modified and unmodified calcium bentonites follow a pseudo second order kinetics mechanism, suggesting that the rate determining step of adsorption involves both the adsorbent and the organic solvent.

Synergistic and Competitive Adsorption of Methylene Blue and Rhodamine B on Core-shell Magnetic Manganese Dioxide Nanocomposites

2017 ◽  
Vol 13 (6) ◽  
Author(s):  
Linshan Wang ◽  
Cholhwan Kim ◽  
Xinyue Zhang ◽  
Carlos Fernandez ◽  
Ting Sun ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Manganese Dioxide ◽  
Rhodamine B ◽  
Competitive Adsorption ◽  
Core Shell
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