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Thermochemical Biorefining II

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A4: Bio-Energy".

Deadline for manuscript submissions: closed (31 January 2020) | Viewed by 4670

Special Issue Editor

Department of Energy, Aalborg University, Pontoppidanstræde 111, 9220 Aalborg, Denmark
Interests: biofuels; thermochemical processes; hydrothermal liquefaction; catalytic upgrading; circular use of resources; sector-coupling technologies; green carbon pathways
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Thermochemical biorefining holds enormous potential for sustainable production of carbonaceous chemicals and fuels; sustainable in terms of economic, environmental and resource efficiency. Within this scope, virtually all organic streams, be they wet/dry, virgin/residual, aquatic/terrestrial, flora/fauna-derived can be processed alone or in mixtures to intermediate platform chemicals and precursors, intermediate fuel products, such as syngas or bio-oils and, from there, efficiently converted to synthetic hydrocarbons or higher alcohols. However, challenges in implementation, process understanding, design and upscaling, identifying and alleviating bottlenecks in process flows, exist within all, as do significant challenges in establishing and documentating sustainability in its full meaning.

The scope of this Special Issue is to present the state-of-the-art within sustainable thermochemical biorefining for fuels and chemicals, and to highlight opportunities within sustainable processing realisable by these pathways.

Prof. Lasse Rosendahl
Guest Editor

Manuscript Submission Information

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Keywords

  • Thermochemical biorefining
  • Hydrothermal liquefaction
  • Pyrolysis
  • Gasification
  • Fischer-Tropsch
  • Synthetic fuels
  • Circular economy
  • Bioeconomy
  • Sustainability
  • Life cycle analysis
  • Biofuels
  • Biochemicals
  • Direct thermochemical liquefaction
  • Drop-in biofuels

Published Papers (1 paper)

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Research

18 pages, 5059 KiB  
Article
Bio-Crude Production through Aqueous Phase Recycling of Hydrothermal Liquefaction of Sewage Sludge
by Ayaz A. Shah, Saqib S. Toor, Tahir H. Seehar, Rasmus S. Nielsen, Asbjørn H. Nielsen, Thomas H. Pedersen and Lasse A. Rosendahl
Energies 2020, 13(2), 493; https://0-doi-org.brum.beds.ac.uk/10.3390/en13020493 - 19 Jan 2020
Cited by 50 | Viewed by 4223
Abstract
Hydrothermal liquefaction (HTL) is a promising technology for the production of bio-crude. However, some unresolved issues still exist within HTL, which need to be resolved before its promotion on a commercial scale. The management of the aqueous phase is one of the leading [...] Read more.
Hydrothermal liquefaction (HTL) is a promising technology for the production of bio-crude. However, some unresolved issues still exist within HTL, which need to be resolved before its promotion on a commercial scale. The management of the aqueous phase is one of the leading challenges related to HTL. In this study, the sewage sludge has been liquefied at 350 °C with and without catalyst (K2CO3). Subsequently, aqueous phase recycling was applied to investigate the effect of recycling on bio-crude properties. Obtained results showed that the energy recovery in the form of bio-crude increased by 50% via aqueous phase recirculation, whereas nitrogen content in the bio-crude was approximately doubled after eight rounds of recycling. GCMS characterization of the aqueous phase indicated acetic acid as a major water-soluble compound, which employed as a catalyst (0.56 M), and resulted in a negligible increase in bio-crude yield. ICP-AES highlighted that the majority of the inorganics were transferred to the solid phase, while the higher accumulation of potassium and sodium was found in the aqueous phase via successive rounds of recycling. Full article
(This article belongs to the Special Issue Thermochemical Biorefining II)
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