Search





 Advanced search
 

Papers, Slide presentations, Posters



Paper details

Title:

Time-dependent Catalytic Activation of Inactive K-Feldspar by Layer Formation during Fluidized Bed Conversion with Residual Fuels

Author(s):

Wagner, K., Hammerl, C., Kuba, M., Hofbauer, H.

Document(s):

Paper Paper

Poster Poster

Abstract:

Olivine is currently used as bed material in dual fluidized bed steam gasification due to its catalytic activity towards the water-gas-shift (WGS) reaction and tar reforming. However, olivine contains traces of heavy metals which necessitate an expensive disposal of the accruing ash. The study of alternative bed materials for DFB steam gasification is therefore of major importance. The activity of a bed material is one important factor when classifying its suitability. Several alternative bed materials like quartz and K-feldspar are non-active when fresh but become activated during operation by interaction with the ash by forming layers. The focus of this work was therefore to quantify the initial activation of K-feldspar over the first operational hours as exemplary inactive bed material. Bed material samples from fluidized bed combustion were collected during operation. The fuels used were bark, chicken manure and a bark/chicken manure mixture. The obtained samples were sieved to 200 250 m and tested in a micro-scale test-rig regarding the WGS reaction. A time-dependent activation of K-feldspar was observed marking a first step in better understanding the activation of bed materials.

Keywords:

catalysis, gasification, ashes, layer formation

Topic:

Biomass Conversion Technologies for Heating, Cooling and Electricity

Subtopic:

Gasification for power, CHP and polygeneration

Event:

27th European Biomass Conference and Exhibition

Session:

2CV.2.4

Pages:

779 - 785

ISBN:

978-88-89407-19-6

Paper DOI:

10.5071/27thEUBCE2019-2CV.2.4

Price:

FREE