Ash Transformation during Single-Pellet Combustion of Agricultural Biomass with a Focus on Potassium and Phosphorus

Ali Hedayati,Christoffer Boman,Norbert Kienzl,Robert Lindgren,Marcus Öhman,Nils Skoglund

doi:10.1021/acs.energyfuels.0c03324

Abstract

In this study, ash transformation and release of critical ash-forming elements during single-pellet combustion of different types of agricultural opportunity fuels were investigated. The work focus ...

Highlights

Concerns about global warming and limited resources of fossil fuels have led to the ever-increasing attention to alternative energy sources
Agricultural biomass typically has a higher content of phosphorus (P), potassium (K), and silicon (Si) than woody biomass, which could have an undesirable influence on different ash transformation pathways.[2,5−7] In several studies, it has been shown that using P-rich agricultural fuels in thermal conversion processes can cause severe ash-related problems such as deposits and slag formation,[8,9] corrosion,[10] and particulate matter emissions.[11]
The ash transformation reactions occurring in thermal conversion of Pand K-rich agricultural biomass assortments are still not fully understood[2] and rarely described in the literature

Summary

Introduction

Concerns about global warming and limited resources of fossil fuels have led to the ever-increasing attention to alternative energy sources. Biomass is one of the encouraging CO2-neutral alternative energy sources, and it has a high potential to be utilized in thermal conversion units due to its abundance and high availability worldwide.[1] there are some challenges to use biomass as an energy source in different technologies. One of them is related to the ash-forming elements in biomass materials that may cause several ashrelated operational problems, for example, deposit formation, slagging, corrosion, and particulate matter emissions. The ash transformation reactions occurring in thermal conversion of Pand K-rich agricultural biomass assortments are still not fully understood[2] and rarely described in the literature

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