Environmental catalysis: trends and outlook

Centi, Gabriele; Ciambelli, Paolo; Perathoner, S.; Russo, Patrizia

doi:10.1016/s0920-5861(02)00037-8

Cited by 189 publications

(96 citation statements)

References 8 publications

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“…All the samples exhibit cubic spinel phase of Co 3 O 4 . As for the silica supported catalysts, the diffraction intensity for Co 3 and Co(21.3%)/c-Al 2 O 3 , respectively. It seems that the textural properties of the support can affect profoundly the dispersion of the supported Co 3 O 4 catalysts.…”

Section: Catalytic Activity Evaluationmentioning

confidence: 86%

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Mesoporous silica supported cobalt oxide catalysts for catalytic removal of benzene

Hao

et al. 2007

J Porous Mater

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Two types of mesoporous silica SBA-15 with different pore diameter were synthesized with an ageing temperature of 373 K and an ageing temperature of 308 K, respectively; in addition, mesoporous silica with amorphous structure was synthesized by adding organosiloxane as part of the silica source during the synthesis procedure. Mesoporous silica and conventional alumina supported cobalt oxide catalysts were prepared by incipient wetness impregnation method. These materials were characterized by FT-IR, nitrogen adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM) and Temperature programmed reduction (TPR) techniques, and the activity of the supported cobalt oxide catalysts for deep oxidation of benzene were evaluated in a fixed-bed reactor. It seems that the pore diameter of the silica increase with the elevation of the ageing temperature. Mesoporous silica supported cobalt oxide catalysts are more active than conventional alumina supported ones. Cobalt oxide can be relatively better dispersed on the surface of mesoporous silica which has larger pore diameter and surface areas. Meanwhile, more silanol groups exist on the surface of amorphous silica, which could induce a strong interaction with the supported cobalt oxide species, leading to poor activity for benzene oxidation.

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Section: Catalytic Activity Evaluationmentioning

confidence: 86%

“…Catalytic deep oxidation is as an energy-saving and highefficiency technique for the reduction of industrial emission of VOCs [2,3]. The activity of the catalysts is an important factor determining the effectiveness of this technique.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous silica supported cobalt oxide catalysts for catalytic removal of benzene

Hao

et al. 2007

J Porous Mater

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“…Environmental catalysis is defined as the development of catalytic materials suitable for abatement of environmental pollutants or to be used in more sustainable and environmentally sound production processes compared with the existing ones [346]. Catalysis has been used already for around 30 years in emissions abatement, e.g., in SOx, VOCs, automotive exhaust gas purification via converting them to less harmful compounds [347].…”

Section: Utilization Of Voc Emissions and Sustainabilitymentioning

confidence: 99%

Utilization of Volatile Organic Compounds as an Alternative for Destructive Abatement

et al. 2015

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Abstract:The treatment of volatile organic compounds (VOC) emissions is a necessity of today. The catalytic treatment has already proven to be environmentally and economically sound technology for the total oxidation of the VOCs. However, in certain cases, it may also become economical to utilize these emissions in some profitable way. Currently, the most common way to utilize the VOC emissions is their use in energy production. However, interesting possibilities are arising from the usage of VOCs in hydrogen and syngas production. Production of chemicals from VOC emissions is still mainly at the research stage. However, few commercial examples exist. This review will summarize the commercially existing VOC utilization possibilities, present the utilization applications that are in the research stage and introduce some novel ideas related to the catalytic utilization possibilities of the VOC emissions. In general, there exist a vast number of possibilities for VOC OPEN ACCESSCatalysts 2015, 5 1093 utilization via different catalytic processes, which creates also a good research potential for the future.

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“…ED represents the reactant state of the last reaction (D in Figure 4) with a barrier of 0.62 [0.63] eV and a product state PD that transforms finally by a last CO rearrangement in a fully reduced C 4v Pd 13 (CO) 4 (FIN in Figure 4). formation of the remaining three CO 2 .…”

Section: Journal Of the American Chemical Societymentioning

confidence: 99%

Oxidation State and Symmetry of Magnesia-Supported Pd₁₃O_xNanocatalysts Influence Activation Barriers of CO Oxidation

et al. 2012

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Combining temperature-programmed reaction measurements, isotopic labeling experiments, and first-principles spin density functional theory, the dependence of the reaction temperature of catalyzed carbon monoxide oxidation on the oxidation state of Pd 13 clusters deposited on MgO surfaces grown on Mo(100) is explored. It is shown that molecular oxygen dissociates easily on the supported Pd 13 cluster, leading to facile partial oxidation to form Pd 13 O 4 clusters with C 4v symmetry. Increasing the oxidation temperature to 370 K results in nonsymmetric Pd 13 O 6 clusters. The higher symmetry, partially oxidized cluster is characterized by a relatively high activation energy for catalyzed combustion of the first CO molecule via a reaction of an adsorbed CO molecule with one of the oxygen atoms of the Pd 13 O 4 cluster. Subsequent reactions on the resulting lower-symmetry Pd 13 O x (x < 4) clusters entail lower activation energies. The nonsymmetric Pd 13 O 6 clusters show lower temperature-catalyzed CO combustion, already starting at cryogenic temperature.

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Environmental catalysis: trends and outlook

Cited by 189 publications

References 8 publications

Mesoporous silica supported cobalt oxide catalysts for catalytic removal of benzene

Mesoporous silica supported cobalt oxide catalysts for catalytic removal of benzene

Utilization of Volatile Organic Compounds as an Alternative for Destructive Abatement

Oxidation State and Symmetry of Magnesia-Supported Pd₁₃O_xNanocatalysts Influence Activation Barriers of CO Oxidation

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Environmental catalysis: trends and outlook

Cited by 189 publications

References 8 publications

Mesoporous silica supported cobalt oxide catalysts for catalytic removal of benzene

Mesoporous silica supported cobalt oxide catalysts for catalytic removal of benzene

Utilization of Volatile Organic Compounds as an Alternative for Destructive Abatement

Oxidation State and Symmetry of Magnesia-Supported Pd13OxNanocatalysts Influence Activation Barriers of CO Oxidation

Contact Info

Product

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Oxidation State and Symmetry of Magnesia-Supported Pd₁₃O_xNanocatalysts Influence Activation Barriers of CO Oxidation