Files and links (1)
CC BY V4.0, Open Access
Journal article
Comparative analysis of non-isothermal decomposition kinetics in Chrysotila carterae (Haptophyta) culture: Effects of coccolith removal
Biomass & bioenergy, Vol.199, 107921
2025
Abstract
The cement industry is a major contributor to global CO2 emissions, necessitating sustainable alternatives. Biocement production using microalgae-derived calcium carbonate (CaCO3) offers a promising solution. Coccolithophores, a group of calcifying microalgae, naturally produce CaCO3, which can be extracted and utilized in biocement production to reduce the industry's carbon footprint. This study investigates the thermal degradation of Chrysotila carterae biomass before and after coccolith removal to assess its thermal stability. Thermogravimetric analysis (TGA) confirmed effective coccolith extraction via acid treatment. Isoconversional models (Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose, and Starink) were applied at multiple heating rates (5, 10, 25 °C/min) to determine the activation energy (Ea). The coccolith-free biomass exhibited significantly higher Ea values (3441.2 ± 4.3 kJ/mol) than biomass with coccoliths (536.4 ± 4.8 kJ/mol), indicating improved heat resistance. Further kinetic modeling using Coats-Redfern and Malek methods identified the three-way transfer model as the best fit. These results provide crucial insights into the thermal behavior of C. carterae, facilitating its optimal use in biocement production. Additionally, understanding its thermal decomposition enhances the feasibility of utilizing the residual biomass in other applications, including bioenergy. This study contributes to advancing sustainable cement alternatives and biomass valorisation.
[Display omitted]
•Coccolith removal increased activation energy from 536.4 to 3441.2 kJ/mol.•Acid treatment effectively removed coccoliths from Chrysotila carterae biomass.•FWO, KAS, and Starink models used at 5, 10, and 25 °C/min heating rates.•Three-way transfer model showed the best fit, with MSE of 0.005•Coccolith removal enhanced thermal stability and biocement potential.
Details
- Title
- Comparative analysis of non-isothermal decomposition kinetics in Chrysotila carterae (Haptophyta) culture: Effects of coccolith removal
- Authors/Creators
- Saleha Al-Mardeai - Chemical and Petroleum Engineering, UAE University, 15551, Al Ain, United Arab EmiratesHilal El-Hassan - Civil and Environmental Engineering, UAE University, 15551, Al Ain, United Arab EmiratesNavid R. Moheimani - Murdoch University, Centre for Water, Energy and WasteWaleed Hamza - Biology Department, UAE University, 15551, Al Ain, United Arab EmiratesTamer El-Maaddawy - Civil and Environmental Engineering, UAE University, 15551, Al Ain, United Arab EmiratesSulaiman Al-Zuhair - Chemical and Petroleum Engineering, UAE University, 15551, Al Ain, United Arab Emirates
- Publication Details
- Biomass & bioenergy, Vol.199, 107921
- Publisher
- Elsevier Ltd.
- Number of pages
- 9
- Identifiers
- 991005778130707891
- Copyright
- © 2025 The Authors.
- Murdoch Affiliation
- School of Environmental and Conservation Sciences
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
1 File views/ downloads
25 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.171 Photoproductivity
- 3.171.477 Microalgae Biotechnology
- Web Of Science research areas
- Agricultural Engineering
- Biotechnology & Applied Microbiology
- Energy & Fuels
- ESI research areas
- Environment/Ecology