Catalytic torrefaction using potassium carbonate (K 2 CO 3) impregnation is a pretreatment
method demonstrated to catalyze wood powder's thermal degradation for energy use. In this …

High alkali impregnation (HAI) increases the total yield of softwood pulps following kraft
cooking. This yield improvement is also maintained after oxygen delignification. This study …

The purpose of the impregnation stage is to ensure that cooking chemicals reach all parts of
the chips. However, as alkali comes into contact with wood, reactions take place, which alter …

A pulp yield increase up to 2% can be achieved by impregnation with a liquor containing 2
M effective alkali (EA) concentration instead of 1 M. The yield increase is due to higher …

Local evolution of delignification and xylan removal inside wood chips was investigated
throughout the initial stages of kraft cooking. Model chips of birch sapwood were pulped at …

Impregnation with high initial concentration is fast and efficient, leading to a homogeneous
delignification in the subsequent cook, resulting in improved screened pulp yield. To obtain …

Although organosolv processes using high-boiling solvents have been investigated in
recent decades for developing novel industrial processes, there are potential benefits of …

This study investigated whether the yield improvement after high alkali impregnation (HAI) is
maintained after oxygen delignification and whether the potential of oxygen delignification to …

Oxygen delignification is widely used in the pulp and paper industry as a part of
delignification process between the kraft cook and bleaching. However, its potential has not …

Presteaming is a well-established technique in pulp mills, which improves cooking liquor
impregnation by removing air from within and between chips. The aim of the study was to …