Chemometric interpretation of different biomass gasification processes based on the syngas quality: Assessment of crude glycerol co-gasification with lignocellulosic biomass

PCA has evidenced the strongest correlations among the variables included in the sets, which were further used to discuss the similarities among the produced gases. Some of the major conclusions derived from PCA results concern the comparability of gases produced by co-gasification of crude glycerol and olive kernel with the published data, particularly with gases produced by gasification of olive residues with intermediate to the highest H2 contents, intermediate to low CO2 contents and intermediate H2/CO ratios. Even though olive-based waste gasification may result in wide range of the gas composition, the majority of the considered syngases was separated on the PCA biplots from gases produced by gasification of woody and other non-woody biomass due to higher H2/CO ratios.