A fluidizable Zn-offretite for selective thiophenic species adsorption. Additive performance under FCC conditions

Aponte, Yira; Che‐Galicia, Gamaliel; Lasa, Hugo de

doi:10.1016/j.fuel.2016.08.020

Cited by 11 publications

(2 citation statements)

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“…They can be used as an additive for sulfur reduction in gasoline (refer to Figure ). This selective adsorption takes advantage of the OFF topology consisting of eight smaller member ring pores and OFF acid sites. − Changes in the configuration of the cyclones allow one to collect a thiophenic-rich stream from the outlet gases from the stripper.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

Aponte

Lasa

2017

Ind. Eng. Chem. Res.

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This article reports the effect of adding zinc to an offretite (OFF) zeolite. It is observed that zinc addition does not significantly change the specific surface area, the pore volume, or the pore size distribution. It is noticed, however, that zinc addition influences acid properties of the OFF significantly. For instance, when employing FTIR pyridine adsorption, it is observed that in the Zn-OFF, there are 2.5 times higher Lewis acid sites than Brönsted acid sites. Furthermore, when applying NH3-TPD, three acid sites were identified: (a) abundant number of weak acid sites, (b) fair number of moderate acid strength sites, and (c) scarce number of strong acid sites. Furthermore, NH3 desorption kinetic parameters were also calculated. Two numerical methodologies, linear and nonlinear regression, were implemented. It was noticed that E d augments with zinc as E d for OFF < E d for Zn(2.0 wt %)-OFF < E d for Zn(3.5 wt %)-OFF.

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Section: Introductionmentioning

confidence: 99%

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

Aponte

Lasa

2017

Ind. Eng. Chem. Res.

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“…Table 5 summarizes the diversity of scenarios in which the Riser Simulator was employed as well as its successful application by several research groups and laboratories around the world including mixing studies and process applications. Thus, and as documented in Table 5, the CREC Riser Simulator has been applied successfully to a diversity of catalytic and heterogenous processes including (a) the catalytic cracking of hydrocarbons , (b) the catalytic conversion of biomass derived tars [50][51][52][53][54][55][56][57][58][59], (c) catalytic desulfurization of gasoline [60][61][62][63][64][65][66], (d) chemical looping combustion [67][68][69][70][71][72][73], (d) oxydehydrogenation of light paraffins [74][75][76][77][78][79][80][81][82][83][84], (e) catalytic steam and dry reforming of methane [85][86][87][88][89], and (f) MTBE synthesis [90]. Table 5…”

Section: Crec Riser Simulator Applicationsmentioning

confidence: 99%

The CREC Fluidized Riser Simulator a Unique Tool for Catalytic Process Development

Lasa

2022

Catalysts

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The CREC Riser Simulator is a mini-fluidized bench scale unit invented and implemented in 1992, at the CREC (Chemical Reactor Engineering Centre), University of Western Ontario The CREC Riser Simulator can be operated at short reaction times, in the 3 s to 20 s range. The present review describes and evaluates the original basic concept of the 1992-CREC Riser Simulator Unit, and the improved design of the 2019-CREC Riser Simulator. Both the initial and the enhanced units are specially engineered to allow the rigorous assessment of both catalyst performance and catalytic reaction kinetics. Kinetic parameters of relatively simple and accurate mathematical models can be calculated using experimental data from the CREC Riser Simulator. Since its inception in 1992, the CREC Riser Simulator has been licensed to and manufactured for a significant number of universities and companies around the world. Several examples of scenarios where the CREC Riser Simulator can be employed to develop fluidized bed catalytic and heterogeneous reactor simulations are reported in this review. Among others, they include (a) hydrocarbon catalytic cracking, (b) the catalytic conversion of tar derived biomass chemical species, (c) steam and dry catalytic methane reforming, (d) the catalytic oxydehydrogenation of light paraffins, (e) the catalytic desulfurization of gasoline, and (f) biomass derived syngas combustion via chemical looping. In this review, special emphasis is given to the application of the CREC Riser Simulator to TIPB (tri-iso-propyl-benzene) catalytic cracking and the light paraffins catalytic oxydehydrogenation (PODH).

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Kinetics of the thermal decomposition of coke formed on ZnO/H-BEA catalyst in the transformation of 2-methylthiophene in n-hexane stream

Silva

Andrade

Araujo

et al. 2023

J Therm Anal Calorim

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A fluidizable Zn-offretite for selective thiophenic species adsorption. Additive performance under FCC conditions

Cited by 11 publications

References 25 publications

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

The CREC Fluidized Riser Simulator a Unique Tool for Catalytic Process Development

Kinetics of the thermal decomposition of coke formed on ZnO/H-BEA catalyst in the transformation of 2-methylthiophene in n-hexane stream

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A fluidizable Zn-offretite for selective thiophenic species adsorption. Additive performance under FCC conditions

Cited by 11 publications

References 25 publications

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH3-TPD Desorption Models

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH3-TPD Desorption Models

The CREC Fluidized Riser Simulator a Unique Tool for Catalytic Process Development

Kinetics of the thermal decomposition of coke formed on ZnO/H-BEA catalyst in the transformation of 2-methylthiophene in n-hexane stream

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The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models