OPEN ACCESS

Articles online

A Review: Microalgae and Their Applications in CO2 Capture and Renewable Energy

Category: Review

Volume: 15 | Issue: 2 | Pages: 712-742
DOI: 10.4209/aaqr.2014.11.0299
PDF | RIS | BibTeX

Worasaung Klinthong, Yi-Hung Yang, Chih-Hung Huang, Chung-Sung Tan

  • Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan

Highlights

Microalgae have their potential for CO2 capture and utilization in biofuels.
Cultivation in photobioreactor is promising for biofuel industries.
Pretreatment before solvent extraction is necessary to effectively recover lipid.
A hybrid biofuel refinery concept can be implemented profitably for biofuels.
More researches are required for effective production of microalgae-based biofuel.


Abstract

Fossil fuels, which are recognized as unsustainable sources of energy, are continuously consumed and decreased with increasing fuel demands. Microalgae have great potential as renewable fuel sources because they possess rapid growth rate and the ability to store high-quality lipids and carbohydrates inside their cells for biofuel production. Microalgae can be cultivated on opened or closed systems and require nutrients and CO2 that may be supplied from wastewater and fossil fuel combustion. In addition, CO2 capture via photosynthesis to directly fix carbon into microalgae has also attracted the attention of researchers. The conversion of CO2 into chemical and fuel (energy) products without pollution via this approach is a promising way to not only reduce CO2 emissions but also generate more economic value. The harvested microalgal biomass can be converted into biofuel products, such as biohydrogen, biodiesel, biomethanol, bioethanol, biobutanol and biohydrocarbons. Thus, microalgal cultivation can contribute to CO2 fixation and can be a source of biofuels. This article reviews the literature on microalgae that were cultivated using captured CO2, technologies related to the production of biofuels from microalgae and the possible commercialization of microalgae-based biofuels to demonstrate the potential of microalgae. In this respect, a number of relevant topics are addressed: the nature of microalgae (e.g., species and composition); CO2 capture via microalgae; the techniques for microalgal cultivation, harvesting and pretreatment; and the techniques for lipid extraction and biofuel production. The strategies for biofuel commercialization are proposed as well.

Keywords

Microalgae Pretreatment Extraction CO2 capture Biofuels


Related Article

Toxicity Evaluation of Fly Ash by Microtox®

San-Chyi Chang, Ya-Fen Wang , Sheng-Jie You, Yi-Ming Kuo, Cheng-Hsien Tsai, Lin-Chi Wang, Po-Yen Hsu
Volume: 13 | Issue: 3 | Pages: 1002-1008
DOI: 10.4209/aaqr.2012.10.0267
PDF

An Overview of PCDD/F Inventories and Emission Factors from Stationary and Mobile Sources: What We Know and What is Missing

Nicholas Kiprotich Cheruiyot, Wen-Jhy Lee, Ping Yan, John Kennedy Mwangi , Lin-Chi Wang , Xiang Gao, Neng-Huei Lin, Guo-Ping Chang-Chien
Volume: 16 | Issue: 12 | Pages: 2965-2988
DOI: 10.4209/aaqr.2016.10.0447
PDF

Challenges and Perspectives on Carbon Fixation and Utilization Technologies: An Overview

Ping Li, Shu-Yuan Pan, Silu Pei, Yupo J. Lin, Pen-Chi Chiang
Volume: 16 | Issue: 6 | Pages: 1327-1344
DOI: 10.4209/aaqr.2015.12.0698
PDF
;