Paper details

Title:

Influence of Torrefaction on Stability of Fixed-Bed Gasification and Composition of Liquid Syngas Contaminants - an Industrial Experiment

Author(s):

Sosnowska, M., Kwiatkowski, K., Dudyński, M., van Dyk, J.C.

Document(s):

Abstract:

The paper contains results of an industrial experiment involving gasification of three types of woody biomass in an industrial fixed-bed system. The research aimed at investigating the dynamics of syngas production and composition of tars contained in the gas obtained from gasification of sawdust, pellets and torrefied pellets. The average temperature regime of the process was approximately 1,000 K. The test runs conducted with sawdust and ordinary pellets did not cause any operational problems. The most complicated part of the experiment was maintaining process stability during gasification of torrefied pellets, which created a compact fixed bed with a strong tendency to combust rather than gasify. The condensates collected during the experiment contained a distinct water fraction and a dense mixture of hydrocarbons. The main organic species determined by GC-MS in the water fractions were acids, aliphatic alcohols, alkylphenols, and linear and cyclic aliphatic oxygenates. The main organic species in torrefied biomass tar were acids, whereas in tars produced from non thermally pre-treated biomass were composed of alkylphenols, linear and cyclic aliphatic oxygenates and polyfunctional aromatic oxygenates.

Keywords:

fixed bed, gasification, sawdust, torrefaction

Topic:

Biomass Conversion Technologies for Heating, Cooling and Electricity

Subtopic:

Gasification for power, CHP and polygeneration

Event:

22nd European Biomass Conference and Exhibition

Session:

2BO.1.4

Pages:

442 - 447

ISBN:

978-88-89407-52-3

Paper DOI:

10.5071/22ndEUBCE2014-2BO.1.4

Price:

FREE