Kraft Lignin: A Valuable, Sustainable Resource, Opportunities and Challenges

Kraft lignin, a by-product from the production of pulp, is currently incinerated in the recovery boiler during the chemical recovery cycle, generating valuable bioenergy and recycling inorganic chemicals to the pulping process operation. Removing lignin from the black liquor or its gasification lowers the recovery boiler load enabling increased pulp production. During the past ten years, lignin separation technologies have emerged and the interest of the research community to valorize this underutilized resource has been invigorated. The aim of this Review is to give (1) a dedicated overview of the kraft process with a focus on the lignin, (2) an overview of applications that are being developed, and (3) a…

• SF
  Stiftelsen för Miljöstrategisk Forskning

  Awards: 2014/44, project number 2018/11, 2018/11
• EC
  European Commission

  Awards: ECS00000043, 824017
• SF
  Svenska Forskningsrådet Formas

  Award: 2022-01943
• V
  Vetenskapsrådet