Structural and chemical changes of sludge derived pyrolysis char prepared under different process temperatures.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F21%3A00541619" target="_blank" >RIV/67985858:_____/21:00541619 - isvavai.cz</a>

Alternative codes found

RIV/61389021:_____/21:00541619 RIV/67985891:_____/21:00541619 RIV/60461373:22320/21:43922835

Result on the web

<a href="http://hdl.handle.net/11104/0319409" target="_blank" >http://hdl.handle.net/11104/0319409</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jaap.2021.105085" target="_blank" >10.1016/j.jaap.2021.105085</a>

Result language

angličtina

Original language name

Structural and chemical changes of sludge derived pyrolysis char prepared under different process temperatures.

Original language description

Sewage sludge was pyrolyzed at 400–800 ◦C to study the influence of the pyrolysis temperature on the bulk and structural properties of the resulting sludge-chars. For this purpose, sludge-chars were subjected to proximate and ultimate analyses and the textural and porous properties were examined by the nitrogen adsorptiondesorption isotherm. Raman spectroscopy was employed to correlate the results of the structural changes of the sludge-chars obtained by conventional analysis (textural properties) and together with solid state NMR it was used to characterize the organic part of the sludge-chars. Additionally, an XPS of the chars’ surfaces and inner layers of the char particles was conducted to study the phosphorus, nitrogen and sulfur speciation and its changes with regard to the change in pyrolysis temperature and the depth of the char particles. Raising the pyrolysis temperature increased the relative content of phosphates and metaphosphates and decreased the reduced P species relative content. Sulfur speciation analysis revealed an increase in sulfides content and a decrease innsulfates and sulfites content as the temperature was raised. The influence of the temperature on N speciation was marginal. The NMR and Raman spectroscopy results showed a significant contribution of graphite and (poly) aromatic hydrocarbons and a negligible contribution of the carbonyl groups to the structure of the organic part of sludge-chars. The increase in the pyrolysis temperature increased the content of (poly)aromatic hydrocarbons over the total carbon content, revealing its contribution to the porosity evolution. This is in good correlation withnthe microporosity and surface area analyses. Regarding the sludge-char potential soil application, the results may help to predict and better understand the sludge-char stability and N and P plant availability.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20704 - Energy and fuels

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Analytical and Applied Pyrolysis

ISSN

0165-2370

e-ISSN

1873-250X

Volume of the periodical

156

Issue of the periodical within the volume

JUN 2021

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

105085

UT code for WoS article

000663089700010

EID of the result in the Scopus database

2-s2.0-85103753555