Comparison of the gasification of cashew wood and cashew nut shells chars with CO2 and steam

Abstract

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 active 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 se 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 to the shrinking core model (SCM) and the random pore model (RPM). The results show that and water vapor, the activation energies of the cashew wood is greater than those obtained for l function computing time of reaction, the experimental results show that is faster compared to cashew wood; probably due to the steam reactivity is different to char-CO2 reactivity.