From vapour to gas: Optimizing cellulose degradation with gaseous HCl

  • Timo Pääkkönen (Speaker)
  • Kontturi, E. (Contributor)
  • Leena-Sisko Johansson (Contributor)
  • Nieminen, K. (Contributor)
  • Panagiotis Spiliopoulos (Contributor)
  • Aaro Knuts (Contributor)
  • Eric Enqvist (Contributor)

Activity: Talk or presentation typesConference presentation


A novel technique of cellulose nanocrystal (CNC) production is introduced. Use of hydrogen chloride (HCl) vapor to high-yield CNC production has been studied with numerous studies formerly. A new device, which can be applied to the degradation of cellulose with pressurized HCl (99.8 %) gas, was designed and built in Aalto University. LOPD level of cellulose cotton linter filter papers, which was reached by overnight reaction with HCl vapor technique, is now reached with less than 2 h reaction time. Addedly, the reaction kinetics of the degradation of the industrial dissolving pulp was studied with pressurized HCl gas. This technique is a promising candidate to the industrial production of CNC with high yields and industrially feasible reaction time. Eventially, HCl gas is a widely applied process gas in the industry. Moreover, the wasteload of the process is composed of chloride salts after aqueous washing step after pulp degradation.
Period22 Mar 2018
Event titleAmerican Chemical Society National Meeting & Exposition
Event typeConference
Conference number256
OrganiserAmerican Chemical Society
LocationBoston, United States, MassachusettsShow on map
Degree of RecognitionInternational


  • CNC
  • gaseous HCl
  • hydrolysis
  • cellulose