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Fast Pyrolysis of Lignin Extracted by Different Lignocellulosic Biomass after the Pretreatment Process

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Ulakpa W. C., Soomro S., Siddique M., Gbuvoro A.
World News of Natural Sciences
|
2023
|
vol. 47
1-13
EN
The manufacturing of aromatic chemicals and fuels through the rapid pyrolysis of lignin looks promising. Product selectivity and liquid yield are determined by the lignin structure and pyrolysis conditions. Lignocellulosic biomass is a carbon-containing renewable and long-lasting energy source that can be found naturally. Pyrolysis has received a lot of attention for its efficient thermal decomposition of lignocellulose biomass—which includes components of cellulose, hemicellulose, and lignin—into solid, liquid, and gas products. The formation of char is one way to describe the conversion mechanism of pyrolysis. A pre-treatment process was used to extract lignin, and the maximum yield was achieved by varying the time and temperature in a material-to-material ratio of 1:20. Without the use of any inert gas for fluidization, the first set of experiments was carried out at temperatures ranging from 400 to 650 °C. In continuous fast pyrolysis, the heating rate has an excessive rank in converting biomass into liquid, gas, and char yield when the pyrolysis temperature is increased from 600 to 700 and then 800 °C. This research provides a deeper comprehension of the interactions that take place between various components during the rapid pyrolysis of biomass. With an optimal yield of 11.96 percent being NTB, walnut shell (WNS), almond shell (AS), and babool tree bark (BTB) were produced at 600 °C with yields of 11.21, 11.73, 11.88, and 11.96%, respectively. With an optimal yield of 11.17 percent being BTB, walnut shell (WNS), almond shell (AS), and neem tree bark (NTB) were produced at 700 °C at yields of 10.89, 11.23, 11.17, and 10.88%, respectively. For walnut shell (WNS), almond shell (AS), babool tree bark (BTB), and neem tree bark (NTB), respectively, an optimal yield of 11.55 percent was obtained at 800 °C for NTB. Neem tree bark (NTB) produced the highest yield of 11.96 percent when compared to the biomass when heated to 600 °C.
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