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Tesi etd-09052016-145948


Thesis type
Tesi di laurea magistrale
Author
CAMPANINI, SELENE
URN
etd-09052016-145948
Title
Adsorption of alkali metals at high temperature by solid sorbents for the implementation of sewage sludge-derived syngas in solide oxide fuel cells
Struttura
INGEGNERIA DELL'ENERGIA, DEI SISTEMI, DEL TERRITORIO E DELLE COSTRUZIONI
Corso di studi
INGEGNERIA ENERGETICA
Commissione
relatore Prof. Tognotti, Leonardo
relatore Prof. Aravind, Purushothaman V.
Parole chiave
  • adsorption
  • alkali metals
  • high temperature
  • SOFC requirements
Data inizio appello
06/10/2016;
Consultabilità
completa
Riassunto analitico
This thesis regards the removal process of alkali metals using solid sorbents at high temperature for future applications of syngas, obtained by plasma gasification of sewage sludge, in a Solide Oxide Fuel Cell (SOFC).The SOFC requires limited concentration of the contaminants and 1 ppm of alkali metals has to be achieved. Available technologies to remove alkali metals are studied and a literature review is made on solid sorbents for the removal of alkali metals at high temperature gases. The aim of this work is to further study the performance of activated alumina (Al2O3) which showed high performances to remove alkali metals from experimental results found in literature and thermodynamic equilibrium calculations. In this study is investigated the effect of temperature and moisture content on the achievable concentration and adsorption mechanism. Thermodynamic equilibrium calculations are performed in parallel with an experimental investigation. Furthermore the nature of adsorption whether physical or chemical is investigated to better understand the process and to better control alkali metal removal in future applications.
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