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Slow-rate devolatilization of municipal sewage sludge and texture of residual solids.

SYSNO ASEP	0544243
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Slow-rate devolatilization of municipal sewage sludge and texture of residual solids.
Author(s)	Hartman, Miloslav (UCHP-M)_{RID, ORCID, SAI} Čech, B. (CZ) Pohořelý, Michael (UCHP-M)_{RID, ORCID, SAI} Svoboda, Karel (UCHP-M)_{RID, ORCID, SAI} Šyc, Michal (UCHP-M)_{RID, SAI, ORCID}
Source Title	Korean Journal of Chemical Engineering. - : Korean Institute of Chemical Engineers - ISSN 0256-1115 Roč. 38, č. 10 (2021), s. 2072-2081
Number of pages	10 s.
Language	eng - English
Country	KR - Korea, Republic of
Keywords	devolatilization ; reaction kinetics ; sewage sludge ; reaction kinetics
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
OECD category	Chemical process engineering
R&D Projects	QK21020022 GA MZe - Ministry of Agriculture (MZe)
Method of publishing	Limited access
Institutional support	UCHP-M - RVO:67985858
UT WOS	000671772100001
EID SCOPUS	85110367065
DOI	10.1007/s11814-021-0847-8
Annotation	Ash-rich sludge samples originating in four large plants were analyzed and employed to explore primarily the kinetics and the chemistry of devolatilization. A gravimetric, slowly increasing-temperature method was used in the range 298–1,123 K in a milieu of nitrogen. As an intricate combination of numerous (bio)organic and inorganic compounds, the dry sludge commences devolatilizing at approximately 418 K. The bulk of organic matter is released up to 823 K, at the rate becoming very slow thereafter. Basic constituents of the product gas are CO2, CO, H2, and CH4 with undesired nitrogenous, sulfurous, and chloro compounds. The residual solids contain significant amounts of organic matter/carbon and, on account of their favorable textural characteristics, they can be viewed as promising sorbents or catalysts. Kinetic triad was inferred from the experimental data: the model is well-capable of simulating the process of devolatilization and can be used for design considerations. An explicit equation, based upon a tractable approximation to the temperature integral (for [E/(RT)]≥0.1), has been verified and proposed for predicting the maximum reaction rate temperature. Remarkable differences in thermal behavior were explored in detail between the sludge and the alkali bicarbonates.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2022
Electronic address	http://hdl.handle.net/11104/0321886

Number of the records: 1