Development of sepiolite/SiC porous catalytic filters for diesel soot abatement

Tuler, Fernando Esteban; Portela, Raquel; Ávila, P.; Bortolozzi, Juan Pablo; Miró, Eduardo Ernesto; Milt, Viviana Guadalupe

doi:10.1016/j.micromeso.2016.04.026

Cited by 13 publications

(7 citation statements)

References 16 publications

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“…The porosity of the filters was tuned by the addition of pore-generating agents, i.e., organic materials whose combustion led to the formation of interconnected macro-pores. Active elements (Co, Ba, and K [35,36], or Co and Ce [36]) were dispersed either by incorporating them into the dough [35] or by successive impregnation [35,36]. This latter technique assured a good distribution of active elements on both external and internal pore surface and, at the same time, it avoided the exposure of the catalyst to the high calcination temperature needed to remove additives but causing potassium loss [35].…”

Section: Sic Grainmentioning

confidence: 99%

See 1 more Smart Citation

The Issue of Soot-Catalyst Contact in Regeneration of Catalytic Diesel Particulate Filters: A Critical Review

Lisi¹,

Landi²,

Sarli³

2020

Catalysts

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Soot-catalyst contact represents the main critical issue for an effective regeneration of catalytic (i.e., catalyst-coated) diesel particulate filters (DPFs). Most of the literature reviews on this topic have mainly been focused on studies dealing with powdered soot-catalyst mixtures. Although the results obtained on powders surely provide significant indications, especially in terms of intrinsic activity of materials towards soot oxidation, they cannot be directly extended to DPFs due to completely different soot-catalyst contact conditions generated during filtration and subsequent regeneration. In this work, attention is devoted to catalytic DPFs and, more specifically, studies on both catalyst dispersion and soot distribution inside the filter are critically reviewed from the perspective of soot-catalyst contact optimization. The main conclusion drawn from the literature analysis is that, in order to fully exploit the potential of catalytic DPFs in soot abatement, both a widespread and homogeneous presence of catalyst in the macro-pores of the filter walls and a suitably low soot load are needed. Under optimal soot-catalyst contact conditions, the consequent decrease in the temperature required for soot oxidation to values within the temperature range of diesel exhausts suggests the passage to a continuous functioning mode for catalytic filters with simultaneous filtration and regeneration, thus overcoming the drawbacks of periodic regeneration performed in current applications.

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Section: Sic Grainmentioning

confidence: 99%

“…Finally, it is worth mentioning the works by Tuler et al [35,36] and Yang et al [37], where non-traditional substrates were used. Tuler et al prepared wall-flow filters starting from sepiolite [35], a type of low-cost natural clay, or sepiolite/SiC mixtures [36].…”

Section: Sic Grainmentioning

confidence: 99%

The Issue of Soot-Catalyst Contact in Regeneration of Catalytic Diesel Particulate Filters: A Critical Review

Lisi¹,

Landi²,

Sarli³

2020

Catalysts

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“…It was found that the monolith with 70% natural clay in its composition had similar characteristics to commercially available DPF monoliths. The pore size of the monolith has to be improved for better filtration efficiency [61].…”

Section: Other Techniques For Active Regeneration Of Dpfmentioning

confidence: 99%

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Kurien¹

2019

Journal of Thermal Engineering

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The toxic nature of exhaust gases released by these engines has led to environmental concerns, affecting its sustainability. The exhaust emission from diesel engine includes carbon monoxide, nitrates, hydrocarbons and particulate matter. Soot particles contained in the particulate matter is also found to be carcinogenic in nature and also leads to various lung diseases. Diesel oxidation catalysis system involves oxidation of hydrocarbons, nitrates and soluble organic fraction. Diesel particulate filtration blocks the soot particles with the help of alternately plugged diesel particulate filter with porous walls. The regeneration of accumulated soot is one of the major challenges faced by automotive industries for effective implementation of diesel particulate filtration system. A detailed review on the challenges faced in the implementation of emission control techniques has been carried out in this study and it has been explored from the results of literature study that microwave based regeneration technique would be an effective technique. This paper provides a platform for understanding the working principle of post treatment emission control techniques and also on the role of regeneration in effective operation of Diesel Particulate Filter.

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“…Yao et al [26] carried out sequential acid-base composite modification of sepiolite to prepare SiO 2 -Mg(OH) 2 nanocomposites, which exhibited high removal efficiency toward Gd(III), Pb(II) and Cd(II). Sepiolite is a natural nanomaterial with a relatively stable structure and an excellent carrier for other nanoadsorbents [27,28]. Therefore, it can effectively inhibit the agglomeration of nanostructured Mg(OH) 2 .…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Cd(II) Using SiO2-Mg(OH)2 Nanocomposites Derived from Sepiolite

Ren

Hursthouse

et al. 2020

IJERPH

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The pollution of Cadmium (Cd) species in natural water has attracted more and more attention due to its high cumulative toxicity. In the search for improved removal of cadmium from contaminated water, we characterized uptake on a recently identified nanomaterial (SiO2-Mg(OH)2) obtained by subjecting sepiolite to acid-base modification. The structural characteristics of SiO2-Mg(OH)2 were analyzed by means of SEM-EDS, Fourier Transform Infra-Red Spectroscopy (FTIR) and Powder X-ray Diffraction (PXRD). Static adsorption experiments were carried out to evaluate the effect of contact time, temperature, amount of adsorbent, and pH-value on the adsorption of Cd(II) by SiO2-Mg(OH)2. The results show that the pore structure of SiO2-Mg(OH)2 is well developed, with specific surface area, pore size and pore volume increased by 60.09%, 16.76%, and 43.59%, respectively, compared to natural sepiolite. After modification, the sepiolite substrate adsorbs Cd(II) following pseudo-second-order kinetics and a Langmuir surface adsorption model, suggesting both chemical and physical adsorption. At 298 K, the maximum saturated adsorption capacity fitted by Sips model of SiO2-Mg(OH)2 regarding Cd(II) is 121.23 mg/g. The results show that SiO2-Mg(OH)2 nanocomposite has efficient adsorption performance, which is expected to be a remediation agent for heavy metal cadmium polluted wastewater.

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Development of sepiolite/SiC porous catalytic filters for diesel soot abatement

Abstract: Sepiolite/SiC honeycomb monolith Catalytic honeycomb monolith Wall-flow filter Wall detail Wall detail Application as diesel soot catalytic filter 10 µ µ µ µm 10 µ µ µ µm

Cited by 13 publications

References 16 publications

The Issue of Soot-Catalyst Contact in Regeneration of Catalytic Diesel Particulate Filters: A Critical Review

The Issue of Soot-Catalyst Contact in Regeneration of Catalytic Diesel Particulate Filters: A Critical Review

Review on Post-Treatment Emission Control Technique by Application of Diesel Oxidation Catalysis and Diesel Particulate Filtration

Efficient Removal of Cd(II) Using SiO2-Mg(OH)2 Nanocomposites Derived from Sepiolite

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