Sustainable valorization of marine plastic residues via hydrothermal liquefaction for clean energy recovery
Mahadevan Vaishnavi, S. Raja, Maher Ali Rusho, Tesfaye Barza Zema
TL;DR
This study explores using hydrothermal liquefaction to convert marine plastic waste into clean energy, showing promising results for energy recovery and sustainability.
Contribution
The study introduces an optimized HTL process using diatomaceous earth and aqueous-phase recirculation for marine residue conversion.
Findings
A maximum bio crude yield of 51.6% with a high heating value of 40.3 MJ kg-1 was achieved under optimized conditions.
The DE + AQ configuration improved hydrocarbon content and reduced oxygenation in the products.
Energy-positive operation is possible with elevated aqueous-phase recirculation temperature and heat integration.
Abstract
This study evaluates hydrothermal liquefaction (HTL) of real-world marine pollutant residues (MPR) composed of mixed plastics, organic matter, paper, and textiles. Using diatomaceous earth (DE) catalysis and aqueous-phase (AQ) recirculation, the effects on product yield, composition, and energy recovery were examined. Under optimized conditions (380 °C, 80 min, 10 wt% DE, RR = 6 mL g-1), a maximum bio crude yield of 51.6% with an HHV of 40.3 MJ kg-1 was achieved. Elemental, molecular, and thermal analyses (CHNS, GC–MS, FTIR, TGA) indicated improved hydrocarbon content and reduced oxygenation in the DE + AQ configuration. Net energy ratio (NER) calculations showed that the process can achieve energy-positive operation under conditions of elevated AQ recirculation temperature, highlighting the importance of heat integration. While these results demonstrate effective conversion of…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 10
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsThermochemical Biomass Conversion Processes · Subcritical and Supercritical Water Processes · Anaerobic Digestion and Biogas Production