Journal
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
Volume 22, Issue 4, Pages 1176-1183Publisher
SPRINGER
DOI: 10.1007/s10163-020-01010-9
Keywords
Porous carbon; Algae waste; Liquid products
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Funding
- Project Clean technologies for sustainable environment -water, waste, energy for circular economy (Clean and Circle) [BG05M2OP001-1.002-0019]
- European union, European Regional Development Fund, Operational Programme Science and Education for Smart Growth
- Bulgarian National Science Fund, Bulgarian Ministry of Education [KP-06-27/9]
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A novel procedure for the conversion of waste algae waste, remaining from biodiesel production, into gas, liquid products and porous carbon has been developed. The precursor, algae waste is studied by thermogravimetric and differential thermal analysis. First algae material is subjected to pyrolysis at 550 degrees C, and the composition of evolving gas and liquid products is studied-dominant content of polar compounds in the liquid products is determined. The solid product after pyrolysis is subjected to hydro-pyrolysis (physical activation with water vapor) at different temperatures. The pore structure of the obtained carbon after activation at pre-determined optimal temperature is investigated by nitrogen adsorption porosimetry, which demonstrate moderate surface area, microporosity and mesoporosity, developed during activation process. Presence of oxygen functional groups with weak acidic and basic nature is established.
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