In this study we have evaluated the production of gas during lignin pyrolysis under static vacuum con-ditions, the quantity of the most important gases produced, and the role of sulfur compounds. In fact,sulfates can act as oxidizers at the high temperature of pyrolysis (>200◦C) increasing the amount of car-bon dioxide formed. This is related to the detection of reduced volatile sulfur compounds by GC–MS. Wehave evaluated the decrease in the production of CO2and of reduced sulfur species after a simple acidtreatment for the removal of inorganic sulfates from the pristine lignin. The thermovolumetric analysis(TVA) was found as effective as thermogravimetric (TGA) one for the investigation of lignin pyrolysis.
The role of inorganic sulfur compounds in the pyrolysis of Kraft lignin
DONDI, DANIELE;ZEFFIRO, ALBERTO;SPELTINI, ANDREA;BUTTAFAVA, ARMANDO
2014-01-01
Abstract
In this study we have evaluated the production of gas during lignin pyrolysis under static vacuum con-ditions, the quantity of the most important gases produced, and the role of sulfur compounds. In fact,sulfates can act as oxidizers at the high temperature of pyrolysis (>200◦C) increasing the amount of car-bon dioxide formed. This is related to the detection of reduced volatile sulfur compounds by GC–MS. Wehave evaluated the decrease in the production of CO2and of reduced sulfur species after a simple acidtreatment for the removal of inorganic sulfates from the pristine lignin. The thermovolumetric analysis(TVA) was found as effective as thermogravimetric (TGA) one for the investigation of lignin pyrolysis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
