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Conference abstract - Peer-reviewed, 2017

Combustion characteristics of barley straw stored with CaCO3 during fluidized bed combustion using quartz and olivine as bed materials

Bozaghian, Marjan; Rebbling, Anders; Larsson, Sylvia; Xiong, Shaojun; Skoglund, Nils

Abstract

In order to achieve a continuous feedstock supply for power plants a large quantity of harvested material must be stored for long-term periods. During storage, especially during right conditions of temperature, moisture and oxygen, solid agricultural fuels are susceptible to microbial activities. Microbial respiration not only leads to loss of organic carbon, but also to an increased temperature in the stored fuel which may lead to self-ignition. There is on-going work studying the effect of adding Ca as CaO or CaCO3 during storage of straw with the aim of creating an unfavorable alkaline microenvironment that prevents microbial growth during storage. The effect of this amendment during storage is still being explored, but the effect in the combustion step of the process in terms of determining the potential of Ca-additives to positively affect overall ash chemistry have yet to be certainly quantified. Utilization of agricultural crops for energy purposes in heat and power plants has proven to be challenging in numerous ways. Compared to woody fuels, agricultural fuels can cause severe ash-related operational problems in combined heat and power plants through by fouling, slagging and/or bed agglomeration due to their high concentrations of inorganic constituents. The objective of the present study is therefore to determine the fouling and bed agglomeration characteristics during fluidized-bed combustion of barley straw stored with different dosages of Ca to biomass with the main ash-forming elements shown in Figure 1, using two types of bed materials, quartz and olivine.

Keywords

barley; energy crops; storage

Published in

Book title: Combustion characteristics of barley straw stored with CaCO3 during fluidized bed combustion using quartz and olivine as bed materials
Publisher: Swedish university of agricultural sciences

Conference


5th Central European Biomass Conference

Authors' information

Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology
Rebbling, Anders
Umeå University
University of British Columbia
Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology
Skoglund, Nils
Umeå University

UKÄ Subject classification

Inorganic Chemistry
Agricultural Science
Bioenergy

URI (permanent link to this page)

https://res.slu.se/id/publ/86566