Publication detail

A Study of Physicochemical Properties of Stockpile and Ponded Coal Ash

ŠULC, R. ŠÍDLOVÁ, M. FORMÁČEK, P. SNOP, R. ŠKVÁRA, F. POLONSKÁ, A.

Original Title

A Study of Physicochemical Properties of Stockpile and Ponded Coal Ash

Type

journal article in Web of Science

Language

English

Original Abstract

The article describes chemical and also selected physical properties of ponded high temperature fly ash (FA) and bottom ash (BA) from a Melnik lignite power plant located in the Czech Republic. The research was carried out on samples obtained from drills with a depth of up to 54 m and the age of the samples retrieved from the lowest layers of the stockpile dating back to 1960. At the same time, a comparison was made with fresh fly ash and fresh bottom ash obtained from the identical power plant. The study analyzed a total of 98 stockpile samples. The properties selected were studied across the entire stockpile, namely moisture content, specific density, specific surface, carbon content, elemental and phase composition, pH, electrical conductivity and leachability. SEM analyses were also performed. The performed measurements of chemical properties proved the chemical stability of the material even after several decades of storage in the stockpile. The largest changes are evident in the results of the analyses related to the leachability of SO3, Cl- and F-. In contrast, the pH does not change significantly, and the composition is pH neutral or alkaline. Regarding ponded BA, particle disintegration was noted depending on the increasing core borehole depth.

Keywords

stockpile ashponded ashrecoveryCCPsphysicochemical propertiescoal combustion

Authors

ŠULC, R.; ŠÍDLOVÁ, M.; FORMÁČEK, P.; SNOP, R.; ŠKVÁRA, F.; POLONSKÁ, A.

Released

9. 6. 2023

Publisher

MDPI

Location

Switzerland

ISBN

1996-1944

Periodical

Materials

Year of study

15

Number

10

State

Swiss Confederation

Pages count

15

URL

https://www.mdpi.com/1996-1944/15/10/3653

Full text in the Digital Library

http://hdl.handle.net/11012/244979

BibTex

@article{BUT183221,
  author="Rostislav {Šulc} and Martina {Šídlová} and Petr {Formáček} and Roman {Snop} and František {Škvára} and Adéla {Polonská}",
  title="A Study of Physicochemical Properties of Stockpile and Ponded Coal Ash",
  journal="Materials",
  year="2023",
  volume="15",
  number="10",
  pages="15",
  doi="10.3390/ma15103653",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/15/10/3653"
}