Solidification characteristics of solid biofuel densified by two-step torrefaction process

In this study, an innovative densification molding method is proposed; it uses a two-step torrefaction process with a high CO2 reduction effect. The molding method consists of the following two-step torrefaction process at torrefaction temperatures of 463-773 K: In the first step, raw biomass is torrefied to remove some of the volatile matter that inhibits densified molding. In the second step, the torrefied biomass is densified at the above temperature. The purpose of the second torrefaction step is to further enhance the fuel ratio due to the conversion of volatile matter to fixed carbon and to develop the thermal softening of lignin. Solid biofuel densified using a two-step torrefaction process was produced from a Japanese cedar sample, and it was found that its fuel ratio was significantly improved. Furthermore, the mechanism of the adhesive effect during carbonization was elucidated by analyzing the structure of the densified solid biofuel using Raman spectroscopy.PMID:38093142 | DOI:10.1007/s44211-023-00463-w
Source: Anal Sci - Category: Chemistry Authors: Source Type: research