Analysis of carbon footprint and energy performance of biohydrogen production through gasification of different waste ag
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ORIGINAL ARTICLE
Analysis of carbon footprint and energy performance of biohydrogen production through gasification of different waste agricultural biomass from the Philippines Resmond Lat Reaño 1
&
Anthony Halog 2
Received: 1 August 2020 / Revised: 30 October 2020 / Accepted: 13 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Agricultural crop residues are available in abundance in Asian countries such as the Philippines. These residues have high potential as feedstock to produce clean and high-value energy products, to mitigate global warming and reduce dependence on fossil fuels. This study investigated the carbon footprint and energy performance of biohydrogen production system through gasification of different waste agricultural biomass. The proposed system includes biomass transport and pre-processing, gasification process, and biohydrogen enrichment and purification technologies. Calculation of the syngas composition was performed using a stoichiometric-thermodynamic equilibrium model using python script. Generation of energy from fossil fuel to support the system operations produced the highest greenhouse gas emission. The production system using sugarcane leaves as feedstocks exhibited the lowest carbon footprint, highest gasification efficiency, and best energy performance based on the computed energy ratio. Biophysical allocation was used to determine the burden associated with the biomass during its growth phase. Incorporation of the carbon uptake during biomass growth phase reduced the carbon footprint of the system. Sensitivity analysis showed that increasing C/O and H/O ratio improves the quality of the syngas produced, while increasing C/H ratio results to lower biohydrogen yield. In selection of feedstock mix, it is preferred to maximize C/O and H/O ratio while reducing C/ H ratio of the feedstock composition. Keywords Gasification . Biohydrogen . Carbon footprint . Sensitivity analysis . Biophysical allocation
1 Introduction The world energy demand has increased over the years due to rapid increase in global population and industrialization of many areas around the globe [1, 2]. Currently, the use of fossil fuel supplies about 86.4% of the world’s energy requirements [3, 4]. However, energy generation through fossil fuel combustion releases carbon dioxide and other potent greenhouse
* Resmond Lat Reaño [email protected] Anthony Halog [email protected] 1
Department of Engineering Science, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños, 4031 Laguna, Philippines
2
School of Earth and Environmental Science, Faculty of Science, The University of Queensland, Brisbane, Qld 4072, Australia
gases (GHG) which contributes to global warming. Aside from that, studies have shown that as the current energy situation continues, fossil fuel reserve is expected to last for less than 60 years only [5]. Therefore, the demand for renewable energy source has increased as the depletion of natural resources and adverse environm
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