Co-pyrolysis of lignite and rapeseed cake: a comparative study on the thermal decomposition behavior and pyrolysis kinetics

Aysu Ulusal,Başak Burcu Uzun,Elif Yaman

doi:10.1007/s42452-020-04040-y

Aysu Ulusal, Başak Burcu Uzun + Show 1 more

Open Access

https://doi.org/10.1007/s42452-020-04040-y

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Abstract

In this study, physicochemical properties, co-pyrolysis kinetics and characteristics of lignite and rapeseed cake is investigated. While lignite has high calorific value, rapeseed cake has high volatile matter content and low moisture content that is suitable for the pyrolysis reactions. According to the thermal behavior of lignite and rapeseed cake blends, the addition of rapeseed cake into lignite provides to shift to lower initial decomposition temperature of blends compared to lignite. While rapeseed cake has a significant role in determining activation energies at the lower conversion degrees, lignite plays a vital role in specifying the activation energies at the higher conversion degrees. The char yield considerably decreases under the higher rapeseed cake ratio, while both of the bio-oil and gas yields increase. As conclusion, blending of rapeseed cake with lignite provides a positive synergy with regard to volatile yields and follows through different types of chemicals that can be valorized in various applications such as bio-chemicals and bio-fuel.

Highlights

Coal is the most used energy source in power generation in the amount of 36% in the world [1]
Rapeseed cake has a higher volatile matter content, ~ 73.09% which can be regarded suitable for pyrolysis, gasification or combustion processes
The volatile matter content of Seyitömer lignite was higher than the other coal sample that is important to pyrolysis process

Summary

Introduction

Coal is the most used energy source in power generation in the amount of 36% in the world [1]. Coal is a type of mineral which is heterogeneous by chemically and physically. It includes high amount of carbon and lower amount of nitrogen and sulphur. Combustion of coal is caused 43% of CO2 emissions in the world with 28% of the emission from thermal power stations [3]. For this reason, there must be a development about coal-valorization to enhance of energy conversion and decrease emitting of CO2 [4]

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