Integrated biorefineries: CO2 utilization for maximum biomass conversion

RENEWABLE & SUSTAINABLE ENERGY REVIEWS

卷:47

Review

Sharifzadeh, Mahdi¹  Wang, Lei²  Shah, Nilay¹ 

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn, Ctr Proc Syst Engn, London SW7 2AZ, England

[2] Univ London Imperial Coll Sci Technol & Med, Ctr Environm Policy, London SW7 2AZ, England

关键词: Energy sustainability;    Integrated biorefineries;    Biomass pyrolysis;    Microalgae cultivation;    CO2 utilization;    Technoeconomic assessment;    Life cycle analysis;   

DOI  :  10.1016/j.rser.2015.03.001

来源: Elsevier

【 摘 要 】

Biomass-derived fuels can contribute to energy sustainability through diversifying energy supply and mitigating carbon emissions. However, the biomass chemistry poses an important challenge, i.e., the effective hydrogen to carbon ratio is significantly lower for biomass compared to petroleum, and biomass conversion technologies produce a large amount of carbon dioxide by-product. Therefore, CO2 capture and utilization will be an indispensable element of future biorefineries. The present research explores the economic feasibility and environmental performance of utilizing CO2 from biomass pyrolysis for biodiesel production via microalgae. The results suggest that it is possible to increase biomass to fuel conversion from 55% to 73%. In addition, if subsidies and fuel taxes are included in the economic analysis, the extra produced fuel can compensate the cost of CO2 utilization, and is competitive with petroleum-derived fuels. Finally, the proposed integrated refinery shows promise as CO2 in the flue gas is reduced from 45% of total input carbon to 6% with another 19% in biomass residue waste streams. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free