Open AccessPerformance studies on co-gasification between coal/sawdust and coal/wood pellet using RSM
Author(s) -
Fatin Zafirah Mansur,
C. K. M. Faizal,
Minhaj Uddin Monir,
Noor Asma Fazli Abdul Samad,
Samson Mekbib Atnaw,
Shaharin Anwar Sulaiman
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/736/2/022085
Subject(s) - syngas , sawdust , coal , heat of combustion , pulp and paper industry , wood gas generator , biomass (ecology) , pelletizing , waste management , pellet , environmental science , pellets , materials science , chemistry , composite material , organic chemistry , engineering , geology , catalysis , combustion , oceanography
This work presents the comparative study between raw biomass and pre-treated biomass co-gasified with coal with the aimed to investigate the reliability of the pre-treated biomass to enhance the gasification performance. Sawdust and wood pellet (the pelletization form of sawdust) and blends of these two feedstocks with sub-bituminous coal, were gasified in an air atmosphere using an external heated fixed-bed downdraft gasifier system. Response surface methodology (RSM) incorporating with the central composite design (CCD) was applied to assist the comparison of all operating variables. The independent variables were investigated within the specific range of coal ratio from 25 to 75%, gasification temperature from 650 to 850 °C and equivalence ratio from 0.20 to 0.30. Meanwhile, the dependent variables were evaluated on the H 2 /CO ratio in the syngas, higher heating value of the syngas (HHV syngas ) and gas yield (GY). The results revealed the H 2 /CO ratio in the syngas, HHV syngas and GY of more than 1.585, 6.072 MJ/Nm 3 and 2.464 Nm 3 /kg were achieved, respectively for both co-gasification. From the results, the H 2 /CO ratio in the syngas and GY from co-gasification of coal/wood pellet shows a higher value than that of the coal/sawdust. However, for the HHV syngas , co-gasification of the coal/sawdust possess higher value with merely 1% difference from the coal/wood pellet. Therefore, co-gasified coal with wood pellet has the potential to be substitute with the sawdust.