11 research outputs found
TGA Investigation of CO2 Gasification of Hydrothermally Treated Biomass (Corn Cob - Coconut Shell Mixture)
Gasification is one option for producing cleaner fuel
from biomass. A gaseous mixture of H2, CO, CH4, and CO2
is produced through the partial oxidation of biomass with a gasifying agent
such as air, pure O2, steam, CO2, or a mixture of these.
This method is capable of handling a wide range of inhomogeneous biomass
(including forest, agricultural, and organic processing residues) and
converting them into a homogeneous gas with a considerably higher level of
applicability. In this research, the CO2 gasification of hydrothermally
treated biomass has been studied using TG-DTA analyzer (Bruker TG DTA 2000SA)
apparatus. The biomass treated was a mixture of corn cob and
coconut shell (weight ratio of 1:1). This raw biomass was firstly subjected to hydrothermal
treatment at three different temperatures (200, 240, and 270°C-denoted as H-200, H-240, and H-270) using a batch autoclave prior
to being gasified by CO2
under atmospheric pressure in the TGA apparatus. The experimental results show that the weight
loss of hydrochar was resulted mostly from the process of devolatilization (82.92-86.16%). Hydrochar obtained from higher hydrothermal temperatures
demonstrated a lower reactivity of gasification, due to the lower amount of
moisture and volatile matter. In addition, higher-temperature hydrochar
contained lower potassium content and thus shifted the conversion of
gasification reaction to a higher temperature