Biomass combustion systems: A review on the physical and chemical properties of the ashes

• Type: Another Publication in an International Scientific Journal
• Date: 2016

Authors

Nunes, LJR (Author) Other; Matias, JCO (Author) Other; Catalao, JPS (Author) FEUP

Journal

Title: Renewable and Sustainable Energy Reviews

Vol. 53

Pages: 235-242

ISSN: 1364-0321

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 225 Citations

Scopus - 261 Citations

Other information

Authenticus ID: P-00G-MAP

DOI: 10.1016/j.rser.2015.08.053

Abstract (EN): Biomass as an energy source contributes to a decrease in the dependence on imported fossil fuels, while at the same time, adding value to the countries where biomass fuel sources thrive, in addition to providing a source of renewable energy. Knowledge of the behaviour of fuel is essential in order to design and operate equipment safely and efficiently. In particular, knowledge about mineral content is essential because the ashes play an important role in the dynamics of the generation system. Through knowledge of the chemical composition and physical properties of the ashes, it is possible to predict the tendency to form deposits in the boiler components, as well as their potential to cause corrosion, erosion and abrasion. The behaviour of the ashes in the system is highly dependent on fuel, particularly when it comes from industrial waste or energy crops. These fuels have a higher mineral content, particularly sodium (Na), potassium (K), phosphorous (P) and chloride (Cl). They also have higher ash content with a low melting point and high corrosion potential. This paper focuses on the characteristics of the ashes derived from the combustion of biomass, with particular attention paid to the chemical transformations at high temperatures, as well as its effect on the combustion equipment. Emphasis is placed on the potential problems that occur when biomass-burning technologies are used for energy crops, in order to avoid catastrophic failures. It concludes with recommendations for the management, control and prevention of problems associated with ash.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8