Home |  English version |  Mappa |  Commenti |  Sondaggio |  Staff |  Contattaci Cerca nel sito  
Istituto di ricerche sulla combustione
Soppresso il 01/10/2020

Torna all'elenco Contributi in rivista anno 2020

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Second law thermodynamic analysis of syngas premixed flames

Anno di pubblicazione: 2020

Formato: Elettronico Cartaceo

Autori: Acampora, Luigi; Marra, Francesco Saverio

Affiliazioni autori: CNR - Istituto di Ricerche sulla Combustione

Autori CNR:

  • LUIGI ACAMPORA
  • FRANCESCO SAVERIO MARRA

Lingua: inglese

Abstract: The exergy loss in laminar premixed flames of syngas is investigated numerically by analyzing the local entropy generation. The effects of the change in the H-2 molar ratio in H-2-CO mixture at different temperature values (from 300 to 600 K), at atmospheric and high pressure (10 and 50 atm) conditions and for different equivalence ratios (0.5, 1 and 2) are studied identifying both the mainly responsible process for exergy loss and the factors that can positively affect the performance of the syngas combustion. It is found that the chemical reactions are not always the main contribution to the total entropy generation (i.e. to exergy loss) and that the roles of the chemical reactions and heat conduction are strongly affected by pressure. Furthermore, it is underlined that the hydrogen content in syngas worsens the exergy loss due to entropy generation by the combustion process, whereas pressure increase has positive effects. However, these beneficial effects are counterbalanced by an increase of the chemical exergy content in the flue gases (mostly due to unreacted species or incomplete combustion). Therefore, a careful selection of the combustion process conditions is required to meet efficiency constraints if exhaust exergy is not meant to be afterward exploited. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Lingua abstract: inglese

Pagine da: 12185

Pagine a: 12202

Pagine totali: 18

Rivista:

International journal of hydrogen energy Pergamon Press.
Paese di pubblicazione: Regno Unito
Lingua: inglese
ISSN: 0360-3199

Numero volume: 45

Numero fascicolo: 21

DOI: 10.1016/j.ijhydene.2020.02.142

Referee: Sė: Internazionale

Stato della pubblicazione: Published version

Indicizzato da: ISI Web of Science (WOS) [000524161700024]

Parole chiave:

  • Exergy Loss
  • Syngas
  • Premixed Flame
  • Hydrogen
  • Entropy
  • Renewable Fuels

Data di accettazione: 21/02/2020

Altre informazioni: Submitted 3 December 2019

Strutture CNR:

 
Torna indietro Richiedi modifiche Invia per email Stampa
Home Il CNR  |  I servizi News |   Eventi | Istituti |  Focus