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Comparison of the Gasification of Cashew Wood and Cashew Nut Shells Chars with CO2 and Steam

Author Affiliations

  • 1Département de Physique, BP.523 Ziguinchor, Sénégal, Université Assane Seck de Ziguinchor, Ziguinchor, 523, Senegal
  • 2Département de Physique, BP.523 Ziguinchor, Sénégal, Université Assane Seck de Ziguinchor, Ziguinchor, 523, Senegal and Centre de recherche de Royallieu, EA 4297-TIMR, Université de Technologie de Compiègne, Compiègne, BP20529 – 60205, France
  • 3Centre de recherche de Royallieu, EA 4297-TIMR, Université de Technologie de Compiègne, Compiègne, BP20529 – 60205, France
  • 4Centre de recherche de Royallieu, EA 4297-TIMR, Université de Technologie de Compiègne, Compiègne, BP20529 – 60205, France

Res.J.chem.sci., Volume 6, Issue (9), Pages 11-18, September,18 (2016)


Cashew (biomass) is a fairly common plant in the tropics, while pyrolysis/gasification seems to be the best option for his recovery. Experimental gasification with carbon dioxide and steam in a fixe bed reactor studies are reported for a highly reactive South Senegal cashew wood, and cashew nut shells chars. Gasification tests were made in two atmospheres and at three different temperatures between 950°C, 1000°C, and 1050°C. The latter is done in order to investigate the effect of reactivity of these char samples. Gasification rate of carbon conversion at a given temperature is found to be dependent to the gasifying agent, suggesting the use of three models such as the volume reaction model (VRM) which is found to be the more suitable model compared to the shrinking core model (SCM) and the random pore model (RPM). The results show that in the presence of CO2 and water vapor, the activation energies of the cashew wood is greater than those obtained for cashew nut shells. However, by using an empirical function computing time of reaction, the experimental results show that the kinetic reaction of the cashew nut shells with steam and CO2 is faster compared to cashew wood; probably due to the nutshells liquid content (CNSL). In addition, results showed that char-steam reactivity is different to char-CO2 reactivity.


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