Technische Chemie - Wark

Hendrik Multhaupt, M.Sc.
(PhD student)

W3 3-364

+49441 798 3727

E-Mail: hendrik.multhaupt(at)uni-oldenburg.de



Research field: hydrothermal carbonization

 

Research:

  • Hydrothermal carbonization
  • Biomass
  • Sorption
  • Porosity
  • Wastewater treatment

 

PhD Thesis:

Title: Hydrothermal carbonization in the presence of salt-water mixtures

In recent years the method of hydrothermal carbonization (HTC) has received increasing popularity using biowaste for the production of valuable carbonaceous materials. This is achieved by coalification of biomass at mild temperatures (~ 200 °C) and autogenic pressures on a timescale of hours and days. The biochars usually possess low surface areas (specific surface areas - SSA) as measured by e.g. nitrogen sorption. So far, few information is avaible for increasing the SSA by using various additives to the reaction. Usually carbons with high internal areas are achieved by the use of high temperatures (500-900 °C) in combination with either steam or activation agents (physical or chemical activated carbons).

My aim is to find the best additives for developing high surface area carbons at low HTC temperatures (180-220 °C) and to understand the mechanism or function of those.

Testing the received hydrochars in the field of waste water treatment, especially for the sorption of dyes out of water, opens up the potential for possible applications of the samples.