Title:
Formation of N-Containing Heterocycles from Hydrothermal Liquefaction of Model Compounds and Sewage Sludge
Author(s):
Fan, Y., Hornung, U., Dahmen, N., Kruse, A.
Document(s):
Paper
Poster
Abstract:
The hydrothermal liquefaction (HTL) process is limited for fuel applications by the high nitrogen content in the bio-crude in case of the protein-containing biomass. In this study, carbohydrates and proteins are selected as model compounds to perform HTL, investigating the fate of nitrogen and nitrogen-containing heterocycles in the bio-crude. Special attention was paid to the influence of Maillard Reactions on this conversion. In addition, sewage sludge as “real” feedstock is subjected to the same experimental conditions, to compare the formed products with those produced from the model compounds. The results from the model compounds show that higher bio-crude yields (15-40 wt.%) with higher nitrogen content (10-40 wt.%) are produced via HTL of model mixtures, which are increased with reaction temperature. In case of real feedstock, lower bio-crude yields with higher nitrogen content are found from HTL of lipid-extracted sewage sludge under highest temperature. An investigation of the N-containing products formed was performed to derive a scheme of reaction pathways based on the key chemical compounds.
Keywords:
sewage sludge, hydrothermal liquefaction, bio-crude, nitrogen distribution
Topic:
Biomass Conversion Technologies for Fuels, Chemicals and Materials
Subtopic:
Biomass hydrothermal liquefaction
Event:
26th European Biomass Conference and Exhibition
Session:
3CV.6.4
Pages:
1158 - 1162
ISBN:
978-88-89407-18-9
Paper DOI:
10.5071/26thEUBCE2018-3CV.6.4
Price:
FREE
