On a general correlation for catalyst fouling

Pacheco, Michael A.

doi:10.1016/0021-9517(84)90349-x

Cited by 25 publications

(11 citation statements)

References 15 publications

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“…This is different from catalyst deactivation by sintering or poisoning. Several empirical relations have been suggested to model the impact of coking. , In this study, an analytical approach was developed to model the effect of soot deposits inside the filter wall and the impact on SCR reactions.…”

Section: Resultsmentioning

confidence: 99%

A Model Development for Evaluating Soot-NO_x Interactions in a Blended 2-Way Diesel Particulate Filter/Selective Catalytic Reduction

Park

Narayanaswamy

Schmieg

et al. 2012

Ind. Eng. Chem. Res.

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The 2-way diesel particulate filter/selective catalytic reduction (DPF/SCR) emission reduction system has been considered as a potential candidate for future emission standards owing to its advantages in cost savings and packaging flexibility. For the 2-way device, Cu–zeolite is coated inside the DPF substrate as nitrogen oxide (NO x ) reducing (DeNO x ) catalytic material. Therefore, when exhaust gas passes through the 2-way device, NO x reduction and soot filtration occur simultaneously. However, the operating characteristics of the combinatorial device might be different from individual DPF and SCR devices. In this work, a previously developed model was improved to include soot filtration and oxidation. The model has been tested and validated with experimental data from a reactor flow bench in a systematic manner and applied to capture the effect of soot deposits on NO x reduction performance in a 2-way DPF/SCR device. Accordingly, the soot oxidation characteristics of a 2-way device are investigated with various feed gas compositions. Then the effect of soot deposit on the SCR reaction is investigated in terms of deterioration of DeNO x performance and the interaction between soot oxidation reactions and DeNO x SCR reactions.

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Section: Resultsmentioning

confidence: 99%

A Model Development for Evaluating Soot-NO_x Interactions in a Blended 2-Way Diesel Particulate Filter/Selective Catalytic Reduction

Park

Narayanaswamy

Schmieg

et al. 2012

Ind. Eng. Chem. Res.

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“…5,8 However, Pt-supported catalysts are reported as easily deactivated with toluene fouling and coke deposition. [9][10][11][12][13][14][15] Many studies assessing the prevention of fouling and coke have been conducted. 4,6,7,[16][17][18][19] Catalyst stability is important to achieve adequate cost-effectiveness of the organic hydride system.…”

Section: Introductionmentioning

confidence: 99%

Irreversible catalytic methylcyclohexane dehydrogenation by surface protonics at low temperature

et al. 2019

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“…In fundamental studies, the deactivation is approached with an empirical function of time . In further studies, the deactivation is assumed to be the function of kinetic variables like temperature and concentration of reactants, for the same reason that the main reaction rate depends upon these kinetic variables. , The relationship between the empirical and fundamental aspects has been established. , Some authors developed models in which the analysis of fouling are restricted to power-law model relations. − Expecting nonselective deactivation, a correlation for estimating the activity coefficients has been established . The nonintegral order rate expression, the Langmuir–Hinshelwood mechanism, was used to model the fouling process with a typified rate expression, and this model was also extended with the case of combined series/parallel fouling …”

Section: Introductionmentioning

confidence: 99%

Model-Based Investigation of Catalyst Fouling in the Case of Special Hydrocracking of Sunflower Oil and Kerosene Mixture

et al. 2019

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In this work, the catalyst deactivation phenomenon in the case of special hydrocracking of sunflower oil and kerosene mixture was analyzed based on experiments and models. Alternative (bio/waste-originated) fuels are becoming more important to reduce the full life cycle environmental pollution of transportation. One of the production possibilities of these alternative fuels is the co-processing (i.e., catalytic quality improvement) of fossil and biobased feedstocks. The huge number of individual chemical components in the system increases the complexity of the investigation. Moreover, from the chemical analysis viewpoint, only some of these can be followed during the experiments. Hence, the models to describe the processes in this system (hydrocracker) are usually based on lumps (i.e., component groups). Experimental data are reported on the special catalytic hydrocracking of sunflower oil and kerosene mixture for the production of high-quality aviation fuel (JET). Experiments were carried out in a fixed-bed tubular reactor over temperatures between 533 and 613 K, pressure ranging from 30 to 70 bar, and liquid hourly space velocities of 1.0 and 2.0 h −1 , employing a Pt/H-mordenite catalyst. The objective of our work is to investigate the existing lumped models that are suitable for describing the experimental data; moreover, while maintaining the possible reaction pathways, model parameters were identified and validated against the measurements. As a result of the analysis of the measurement data, it has been established that in the case of lower liquid load/higher residence time, a deactivation phenomenon, the so-called catalyst fouling, takes place on the applied catalyst. Three catalyst deactivation models were developed and integrated into the kinetic model: the Levenspiel deactivation kinetic model, a simplified Eley−Rideal mechanism, and the last one based on competitive adsorption.

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On a general correlation for catalyst fouling

Cited by 25 publications

References 15 publications

A Model Development for Evaluating Soot-NO_x Interactions in a Blended 2-Way Diesel Particulate Filter/Selective Catalytic Reduction

A Model Development for Evaluating Soot-NO_x Interactions in a Blended 2-Way Diesel Particulate Filter/Selective Catalytic Reduction

Irreversible catalytic methylcyclohexane dehydrogenation by surface protonics at low temperature

Model-Based Investigation of Catalyst Fouling in the Case of Special Hydrocracking of Sunflower Oil and Kerosene Mixture

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On a general correlation for catalyst fouling

Cited by 25 publications

References 15 publications

A Model Development for Evaluating Soot-NOx Interactions in a Blended 2-Way Diesel Particulate Filter/Selective Catalytic Reduction

A Model Development for Evaluating Soot-NOx Interactions in a Blended 2-Way Diesel Particulate Filter/Selective Catalytic Reduction

Irreversible catalytic methylcyclohexane dehydrogenation by surface protonics at low temperature

Model-Based Investigation of Catalyst Fouling in the Case of Special Hydrocracking of Sunflower Oil and Kerosene Mixture

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A Model Development for Evaluating Soot-NO_x Interactions in a Blended 2-Way Diesel Particulate Filter/Selective Catalytic Reduction

A Model Development for Evaluating Soot-NO_x Interactions in a Blended 2-Way Diesel Particulate Filter/Selective Catalytic Reduction