Effect of temperature on the physicochemical characteristics of pine nut shell pyrolysis products in a screw reactor

ABSTRACT

Pyrolysis experiments of pine nut shells (PNSs) were carried out in a screw reactor at 300–700°C with approximately 98% energy yields. The analysis results showed that higher temperatures result in elevated heating values (HVs) of products but reduced biochar and bio-oil yields. The HVs of pyrolytic gas were remarkably influenced by proportions of CH₄ and H₂. Bio-oil of PNSs consisted primarily of phenols, acids, aldehydes, ketones, furans, and aromatic hydrocarbons. Five hundred degree Celsius was considered as optimal temperature for PNS pyrolysis, and biochar was the primary product with a yield of 37.11% and better Cu²⁺, Ni²⁺, and Zn²⁺ adsorption properties.

KEYWORDS:

• Pine nut shell
• pyrolysis temperature
• screw reactor
• biochar adsorption
• energy yield

Acknowledgement

The authors would like to thank Chenxi Zhao for assisting with experiments.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51706040], the University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2017001], the Heilongjiang Postdoctoral Science Foundation [LBH-Q17024], Academic Backbone Project of Northeast Agricultural University [18XG14], and the Scientific Research Foundation for Returned Scholars of Heilongjiang Province.