Catalytic pyrolysis of Chlorella vulgaris: Kinetic and thermodynamic analysis

Melissa Jia Bao Fong; Adrian Chun Minh Loy; Bridgid Lai Fui Chin; Man Kee Lam; Suzana Yusup; Zeinab Abbas Jawad

doi:10.1016/j.biortech.2019.121689

Catalytic pyrolysis of Chlorella vulgaris: Kinetic and thermodynamic analysis

Bioresour Technol. 2019 Oct:289:121689. doi: 10.1016/j.biortech.2019.121689. Epub 2019 Jun 22.

Authors

Melissa Jia Bao Fong¹, Adrian Chun Minh Loy², Bridgid Lai Fui Chin³, Man Kee Lam⁴, Suzana Yusup⁵, Zeinab Abbas Jawad⁶

Affiliations

¹ Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009 Miri Sarawak, Malaysia. Electronic address: 700015709@student.curtin.edu.my.
² Biomass Processing Lab, Centre for Biofuel and Biochemical Research, Institute of Sustainable Living, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia; Department of Chemical Engineering, University Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia.
³ Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009 Miri Sarawak, Malaysia. Electronic address: bridgidchin@curtin.edu.my.
⁴ Biomass Processing Lab, Centre for Biofuel and Biochemical Research, Institute of Sustainable Living, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia; Department of Chemical Engineering, University Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia. Electronic address: lam.mankee@utp.edu.my.
⁵ Biomass Processing Lab, Centre for Biofuel and Biochemical Research, Institute of Sustainable Living, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia; Department of Chemical Engineering, University Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia. Electronic address: drsuzana_yusup@utp.edu.my.
⁶ Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009 Miri Sarawak, Malaysia. Electronic address: zeinab.aj@curtin.edu.my.

PMID: 31252316
DOI: 10.1016/j.biortech.2019.121689

Abstract

In the present study, catalytic pyrolysis of Chlorella vulgaris biomass was conducted to analyse the kinetic and thermodynamic performances through thermogravimetric approach. HZSM-5 zeolite, limestone (LS), bifunctional HZSM-5/LS were used as catalysts and the experiments were heated from 50 to 900 °C at heating rates of 10-100 °C/min. Iso-conversional model-free methods such as Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), Starink's, and Vyazovkin (V) were employed to evaluate the kinetic parameters meanwhile the thermodynamic parameters were determined by using FWO and KAS methods. The calculated E_A values of non-catalytic and catalytic pyrolysis of HZSM-5 zeolite, LS, and bifunctional HZSM-5/LS were determined to be in the range of 156.16-158.10 kJ/mol, 145.26-147.84 kJ/mol, 138.81-142.06 kJ/mol, and 133.26 kJ/mol respectively. The results have shown that catalytic pyrolysis with the presence of bifunctional HZSM-5/LS resulted to a lower average E_A and ΔH compared to HZSM-5, and LS which indicated less energy requirement in the process.

Keywords: Catalytic pyrolysis; Chlorella vulgaris; Kinetic analysis; Thermodynamic analysis; Thermogravimetric analysis.

MeSH terms

Biocatalysis
Biomass
Chlorella vulgaris / metabolism*
Hot Temperature
Kinetics
Pyrolysis
Thermodynamics
Thermogravimetry