Title:
Mitigation of High-temperature Corrosion during Thermal Processing of Biomass Rich in Chlorine
Author(s):
Maj, I., Niesporek, K., Matus, K.
Document(s):
Paper
Slide presentation
Abstract:
This study presents the influence of aluminosilicate additives: kaolin and bentonite on chlorine content, ash fusion temperatures (AFTs), and corrosive activity of chicken litter (CL) and cattle manure (CM). To assess the corrosion potential of investigated fuels, experimental research on corrosion has been performed. Samples of boiler steel 10Cr9-10 were covered with deposits of investigated ashes and exposed to the temperature of 560 °C for 168 h. After the exposition, the mass gain of samples was measured. Aluminosilicate additives, when applied to chicken litter and cattle manure in the amount of 8wt%, reduce the chlorine content in ashes and elevate their shrinkage starting temperature (SST) and deformation temperature (DT). In the case of CM, the chlorine content in ash was reduced from 6.8% to 2.3% (kaolin) and 2.7% (bentonite). In the case of CL, the chlorine reduction from 6.4% to 3.0% (kaolin) and 3.7% (bentonite) was observed. The reduction of chlorine content in ash is reflected in the mitigation of their corrosive activity. The mass gains of tested 10Cr9-10 samples are significantly reduced by the presence of aluminosilicates in the ash deposits. In the case of CL ash deposit, the mass gain after 168 h of exposition at 560 °C was reduced from 10.5 mg/cm2 to 4.2 mg/cm2 (8wt% of kaolin) and 5.5 mg/cm2 (8wt% of bentonite). A similar tendency can be observed for CM. The mass gain after 168 h of exposition at 560 °C was reduced from 12.2 mg/cm2 to 4.6 mg/cm2 and 5.3 mg/cm2 for kaolin and bentonite, respectively. The presented results demonstrate the ability of kaolin and bentonite to mitigate chlorine corrosion. Therefore, the presence of aluminosilicates can be a simple and cost-effective remedy for corrosion problems during the combustion of high-chlorine fuels.
Keywords:
combustion, corrosion, ashes, animal residues
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Biomass pre-treatment and production of intermediates
Event:
32nd European Biomass Conference and Exhibition
Session:
4CO.12.3
Pages:
511 - 516
ISBN:
978-88-89407-24-0
Paper DOI:
10.5071/32ndEUBCE2024-4CO.12.3
Price:
FREE
