Dilute sulfuric acid hydrolysis of red macroalgae Eucheuma denticulatum with microwave-assisted heating for biochar production and sugar recovery
| Autor: | Herng Kuang Sheen, Yong Yi Teh, Shih Cheng Lin, Wei Hsin Chen, Keat Teong Lee, Inn Shi Tan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
020209 energy Biomass Bioengineering 02 engineering and technology 010501 environmental sciences 01 natural sciences Heating chemistry.chemical_compound Hydrolysis Biochar 0202 electrical engineering electronic engineering information engineering Eucheuma denticulatum Microwaves Sugar Waste Management and Disposal 0105 earth and related environmental sciences biology Renewable Energy Sustainability and the Environment Chemistry Sulfuric acid General Medicine Sulfuric Acids Seaweed biology.organism_classification Pulp and paper industry Agronomy Biofuel Charcoal Acid hydrolysis Sugars |
| Zdroj: | Bioresource Technology. 246:20-27 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2017.07.101 |
| Popis: | This study aims to produce biochar and sugars from a macroalga Eucheuma denticulatum using dilute sulfuric acid hydrolysis along with microwave-assisted heating. The reactions were operated at sulfuric acid concentrations of 0.1 and 0.2M, reaction temperatures of 150-170°C and a heating time of 10min. Compared to the raw macroalga, biochar qualities were improved with increased carbon content and lower ash and moisture contents. The calorific value of the biochar could be intensified up to 45%, and 39% of energy yield was recovered. Apart from producing biochar, the highest total reducing sugars were 51.47g/L (74.84% yield) along with a low by-product 5-HMF of 0.20g/L, when the biomass was treated under the optimum conditions at 160°C with 0.1M H2SO4. Thus, this study demonstrated that macroalgae could be potentially used as biomass feedstock under microwave-assisted acid hydrolysis for the production of biofuel and value-added products. |
| Databáze: | OpenAIRE |
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