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Reaction Kinetics, Mechanisms and Catalysis
Authors: Bianca V. Sousa, Karoline D. Brito, José J. N. Alves, Meiry G. F. Rodrigues, Carlos M. N. Yoshioka, and Dilson Cardoso

study the resistance to deactivation of the catalyst Pt/HMOR. Experimental Preparation of Pt/HMOR catalysts The commercial mordenite zeolite (NH 4 MOR, Si/Al ratio = 10) was supplied by Zeolyst

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resistance inside the catalyst, as mentioned by Chen et al. [ 17 ]. However, obvious catalyst deactivation could only be detected after a certain amount of coke is deposited already. Referring to the kinetic results in the early study [ 7 ], the methanol

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; 5 circulating pump; 6 , 7 sample outlet; 8 A/V meter Oxygen concentration Oxygen bubbling was used in order to provide constant oxygen concentration and to probe resistance

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exhaust additionally requires the supports to have a high resistance against sulfur contained in diesel fuels [ 2 ]. The reaction between alumina and sulfur dioxide produces aluminum sulfate, resulting in a serious catalyst deactivation. The formation of a

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diffusional resistances at higher space velocities [ 29 ], but might as well indicate that this product is formed initially and later converted to the secondary products such as 2,4-DTBP and 4-TBP. Fig. 9 Effect

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increased potency, bioavailability and degradation resistance. However, the growing pharmaceutical industry and the resulting increase in pharmaceutical pollution are becoming a greater risk to the environment. Persistent, bioaccumulative and toxic (PBT

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on BC. It is clear that the removal of MB with BC depends on the dye concentration. This phenomenon may be related to driving forces that need to be overcome for the resistances of mass transfer between the aqueous and solid phases. Similar results

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concentration of propylene monomer at the catalyst surface, M, is taken to be the bulk monomer concentration; (vii) the value of Thiele modulus is less than one which indicates the absence of a internal mass transfer resistance. Table 2

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) showed lower photoactivity but much better mechanical resistance. Therefore, these materials are more appropriate for the preparation of particulate films for large scale water treatment applications. Fig. 5

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estimation Small catalyst particle sizes allowed no mass transfer resistance to be assumed. The dimensionless Mears parameter in this study was below 0.15, indicative of negligible external mass diffusion [ 58 ]. The occurrence of any internal pore

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