Bio-Crude Production through Recycling of Pretreated Aqueous Phase via Activated Carbon

Autor: Thomas Helmer Pedersen, Ayaz Ali Shah, Asbjørn Haaning Nielsen, Lasse Rosendahl, Saqib Toor
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Technology
Control and Optimization
020209 energy
Activated carbon
Aqueous phase recycling
Bio‐crude
Energy Engineering and Power Technology
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
01 natural sciences
12. Responsible consumption
Autoclave
aqueous phase recycling
Phase (matter)
0202 electrical engineering
electronic engineering
information engineering
medicine
activated carbon
Electrical and Electronic Engineering
Sewage sludge
Engineering (miscellaneous)
0105 earth and related environmental sciences
sewage sludge
HTL
bio-crude
Renewable Energy
Sustainability and the Environment
Aqueous two-phase system
Nitrogen
6. Clean water
Hydrothermal liquefaction
chemistry
13. Climate action
Carbon
Sludge
Energy (miscellaneous)
medicine.drug
Nuclear chemistry
Zdroj: Energies; Volume 14; Issue 12; Pages: 3488
Energies, Vol 14, Iss 3488, p 3488 (2021)
Shah, A A, Toor, S S, Nielsen, A H, Pedersen, T H & Rosendahl, L A 2021, ' Bio-crude production through recycling of pretreated aqueous phase via activated carbon ', Energies, vol. 14, no. 12, 3488 . https://doi.org/10.3390/en14123488
ISSN: 1996-1073
DOI: 10.3390/en14123488
Popis: The management and optimization of the aqueous phase are the major challenges that hinder the promotion of hydrothermal liquefaction (HTL) technology on a commercial scale. Recently, many studies reported about the accumulation of the N-content in the bio-crude with continuous recycling of the aqueous phase from high protein-containing biomass. In the present study, sewage sludge was processed at 350 °C in an autoclave. The produced aqueous phase was treated with activated carbon, and its subsequent recycling effect on the properties of the bio-crude and aqueous phase was investigated. By contacting the aqueous phase with activated carbon, 38–43% of the total nitrogen was removed from the aqueous phase. After applying the treated aqueous phase recycling, the energy recovery of the bio-crude increased from 50 to 61% after three rounds of recycling. From overall carbon/nitrogen recoveries, 50 to 56% of the carbon was transferred to the bio-crude phase and more than 50% of the nitrogen remained in the aqueous phase. The aqueous phase contained mostly of N&O-heterocyclic compounds, small chain organic acids, and amides. ICP-AES analysis showed that more than 80% of the inorganic elements were concentrated into the solid phase.
Databáze: OpenAIRE
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