Investigation of biomass ash thermal decomposition by thermogravimetry using raw and artificial ashes

Abstract

The effects of alkali oxide (K 2 O), calcium oxide (CaO) and ratio of silicon oxide to aluminum oxide (SiO 2 /Al 2 O 3 ) on the thermal decomposition of biomass ashes and artificial ashes were examined by using thermogravimetric (TG) and derivative thermogravimetric (DTG) analysis. It was observed that mass losses due to mineral evolution from the ashes mainly occur during three temperature ranges: (a) low temperature, 70-250°C; (b) moderate temperature, 350-450°C; and (c) high temperature, 600-1100°C. The ratios of SiO 2 /Al 2 O 3 almost have no obvious effects of on the mass loss. The CaO content mainly contributes to the peaks at moderate temperature. The alkali contents show clear effects on the TG and DTG curves. The apparent activation energy and pre-exponential factor were obtained based on the first-order assumption for the separate splitting consecutive reaction. The kinetic analysis of the thermal decomposition of biomass ashes to some extent confirms that the initial deformation temperature during ash fusion test is susceptible to the K 2 O evolution at low temperature. It also helps understand the inorganic compounds partitioning during the biomass combustions and thereof effects on the ash fusion temperature.

Determination of active sites during gasification of biomass char with CO2 using temperature-programmed desorption. Part 2: Influence of ash components

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TG analysis and kinetic study of organic constituents in wastewater from coal‐gasification process

“…Thermogravimetric (TG) analysis is one applicable lab‐scale approach and has been extensively adopted to investigate the thermal behaviors of solid fuels . The wastewater sprayed into the gasifier has continuous processes of moisture evaporation, constituent concentration, and chemical reactions.…”

A Novel Granular Activated Carbon Adsorption Method for Separation of Levulinic Acid from Formic Acid

“…In this work, we attempted to separate LA from formic acid in aqueous solution using a granular activated carbon (GAC). The predominant usage of GAC is to remove contaminants from solutions [12,13]. This is the first time that activated carbon is used to separate acid mixtures.…”