Desenvolvimento de uma instalação de separação de gases por adsorção e modelagem do processo

AUTOR(ES)

Celia de Figueiredo Cordeiro Neves

DATA DE PUBLICAÇÃO

2000

RESUMO

Separation processes account for the major production costs in chemical, petrochemical and related industries. Commercial pressure swing adsorption processes (the so-called PSA processes) have been intensively applied in industry since they need lower energy and are less costly than conventional separation processes for low to medium production rates. This work aims to develop a gas separation unit by the PSA process to produce oxygen enriched air between 25 % and 50 % to be used in combustion and oxidation processes. Another objective is to build a model of the process by which its performance can be evaluated through three parameters: product purity, product recovery and adsorbent productivity. To reach these objectives a PSA unit of laboratory scale was designed and built, that uses a bed filled with a type 5A-zeolite adsorbent. Instruments for measuring flow rate, pressure, concentration and temperatures and solenoid valves were linked to a programmable logic controller. A computer was used for data acquisition and to control the experimental set-up. Great effort of research and study placed for design and construction of the installation required a multidisciplinary team of specialists in many fields like processes, materials, automation and control, which was very helpful to consolidate the present research. Using a factorial design of experiments it was possible to develop appropriate empirical models for evaluating purity, recovery and productivity against operational conditions, with mean errors varying between I and 4%. The experimental results and executed simulations of the process showed that the PSA unit works properly for production of oxygen enriched air at a purity of 43 %, recovery around 50 % and productivity of 0,06 mol Ozlkg.cic1o. The process was optimized by another parameter, called separative capacity, which uses basic concepts of cascade theory applied to isotope separations

ASSUNTO(S)

adsorção gases - absorção e adsorção chemical processes adsorption processos quimicos gases

Documentos Relacionados

• Modelagem e simulação do processo de separação de oleo de soja-hexano por evaporação
• Desenvolvimento de um sistema para simulação e otimização do processo de adsorção para avaliação da separação de misturas liquidas
• Estudo do processo de desterpenação do oleo essencial de laranja por adsorção : seleção de adsorventes e modelagem do processo
• Gas separation unit by adsorption : simulation and adsorbent characterization
• Modelagem de processo em um sistema de separação submarina de petroleo