The Reactor Tube
Mostrando 13-23 de 23 artigos, teses e dissertações.
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13. PHOTOREACTORS EVALUATION BY THE DEGRADATION OF REACTIVE DYES AND TEXTILE EFFLUENT / AVALIAÇÃO DE FOTORREATORES NA DEGRADAÇÃO DE CORANTES REATIVOS E EFLUENTE TÊXTIL
The continuous search for better quality of life, nowadays, implies in industrial growth e, consequently, in greater or minor degree of environmental pollution. The textile industry is responsible for part of this pollution; among the several environmental problems generated by the textile industry, two are distinguished: the not setting of dyes on the fiber
Publicado em: 2004
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14. Degradation of the Herbicida Atrazina saw Processes Advanced of Oxidation / DegradaÃÃo do Herbicida Atrazina via Processos AvanÃados de OxidaÃÃo
Herbicide contamination of the aquatic environment is widespread, particularly that caused by the triazine group herbicide Atrazine, which is used for weed-control in sugar-cane crops in the State of Pernambuco in Brazil. Atrazine is a âpriority pollutantâ since it is carcinogenic and is highly resistant to biological breakdown, with a 12 months half-life
Publicado em: 2004
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15. Modelagem simulação e controle de um reator radial empregado na isomerização de xilenos
The great commercial interest in xylenes isomerization process is due to the high aggregated value conferred to p-xylene in many industrial applications. Typical industrial adiabatic fixed-bed reactor with radial centripet flow is used in this process. During operation catalyst activity decay uccurs due carbon compounds formation and deposition, reducing rea
Publicado em: 2002
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16. Estudo de fermentação alcoolica por celulas de Saccharomyces cerevisiae imobilizadas em Crisotila
Chrysotile is a constituted mineral of silicate of magnesium of fibrous abundant in Brazil and it can be used as mineral support for yeast cells in continuous fermentation for ethanol production with immobilizedcells, which don t move fteely in the aqueous phase of the reactor, contributing to elevate its cellular density that promotes the speed increase of
Publicado em: 2001
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17. Estudo experimental de uma valvula conica para controle da descarga de solidos em leito fluidizado
Feed valve are essential devices in gas-solid systems, in process as fluidized bed drying, pneumatic transport, coal combustion, biomass gasification and synthesis reactions in fluidized beds. All require a feed valve for the particulate solid to control the mass flow rate entering andlor leaving the processo. This work presents the development and the exper
Publicado em: 2001
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18. Estudo de transferencia de oxigenio em reatores tipo air-lift utilizando venturi e peças cisalhantes
The application of air-lift reactors in wastewater treatment is very attractive, when compared to the conventional ones, as they show high air to water oxygen transfer rates from, with great possibility of treating wastewater with high pollutants concentration with moderate costs. The use of venturis and centrifugal pumps as means of promoting air-lift react
Publicado em: 1999
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19. Derivatização pos-coluna de especies hidroliticas de Cr (III)
fast and sensitive method for the determination of hydrolytic species of Cr (III) - such as monomer, dimer and trimer - present in low concentrations in aqueous solutions was developed. For the separation of these species, a column of Kel-F with dimensions af 0,4 x 5cm, packed with a strong acid cation-exchange resin, Bio Rad AG 50W x-4 (400 mesh) was utiliz
Publicado em: 1990
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20. Contribuição a simulação computacional do processo de LPCVD
This work deals with the study and simulation of LPCVD-Low Pressure Chemical Vapour Deposition- a basic process for thin film deposition. The reaction of silicon deposition by silane pyrolisis is adopted for its simplicity and importance without sacrifieing the quality of treatment. To begin with, we present the atmospheric presure CVD technique in the light
Publicado em: 1990
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21. Comparison of Reactors for Oxygen-Sensitive Reactions: Reductive Dechlorination of Chlorophenols by Vitamin B12s
Serum bottles are frequently used for studies of reductive dechlorination by vitamin B12, but reducing conditions can be maintained only for several days. This time period is inadequate for evaluating the reductive dechlorination of some slow-reacting aromatic compounds. Sealed glass ampoules maintain reducing conditions for many months, but this method has
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22. Hemophilia as a defect of the tissue factor pathway of blood coagulation: effect of factors VIII and IX on factor X activation in a continuous-flow reactor.
The effect of factors VIII and IX on the ability of the tissue factor-factor VIIa complex to activate factor X was studied in a continuous-flow tubular enzyme reactor. Tissue factor immobilized in a phospholipid bilayer on the inner surface of the tube was exposed to a perfusate containing factors VIIa, VIII, IX, and X flowing at a shear rate of 57, 300, or
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23. Palladium-Mediated Hydrogenation of Unsaturated Hydrocarbons with Hydrogen Gas Released during Anaerobic Cellulose Degradation
Among five hydrogenation catalysts, palladium on charcoal was the most reactive one when suspended in anaerobic culture medium, and Lindlar catalyst (Pd on CaCO3) was the most reactive one when suspended in the gas phase of culture tubes. Palladium on charcoal in the culture medium (40 to 200 mg 10 ml−1) completely inhibited growth of Neocallimastix fronta