The influence of temperature on the physicochemical properties of products of pyrolysis of leather-tannery waste
| Autor: | Łukasz Heda, Jacek Kluska, Mateusz Ochnio, Dariusz Kardaś |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Waste Products
Thermogravimetric analysis Hot Temperature Chemistry 020209 energy Condensation Temperature 02 engineering and technology 010501 environmental sciences 01 natural sciences Chemical engineering Yield (chemistry) 0202 electrical engineering electronic engineering information engineering Degradation (geology) Heat of combustion Composition (visual arts) Gases Char Waste Management and Disposal Pyrolysis 0105 earth and related environmental sciences |
| Zdroj: | Waste Management. 88:248-256 |
| ISSN: | 0956-053X |
| Popis: | The present paper examines the pyrolysis of waste from leather tanneries at 300–500 °C. These studies are important because of difficulties in the utilisation of this type of waste as well as its energy potential as fuel. The pyrolysis of tannery waste and data from the relevant literature showed that thermal degradation can be explained using tanned collagen as a reference. Moreover, the experimental results indicated that this process is highly non-linear, due to various mechanisms of heat transport which cause temperature differences in a laboratory pyrolysis reactor. Thermogravimetric analysis has shown that the greater part of mass loss is observed between 80 and 500 °C and that the most significant mass release occurs at 325 °C. Moreover, the proportions of CO2 and CO decrease along with increasing temperatures. The paper presents characteristics of the composition of solid, liquid, and gaseous products of leather-waste pyrolysis at various temperatures. The maximum heating value of gaseous products at 500 °C was 9.54 MJ/Nm3. An increase from 300 to 500 °C results in the dominant position of condensation polymerisation; the maximum value of the liquid phase yield is reached at 400 °C (42%). HHV analysis of the resulting char showed a maximum value of 21.18 MJ/kg at 450 °C. The results of oxidised component analysis showed that the major oxidised component of char was chromium oxide (Cr2O3), with a content of approximately 8.5% at all pyrolysis temperatures. |
| Databáze: | OpenAIRE |
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