High-Energy-Density Hydrochar and Bio-Oil from Hydrothermal Processing of Spent Coffee Grounds—Experimental Investigation DOI Creative Commons
Mariusz Wądrzyk, Jakub Katerla, Rafał Janus

et al.

Energies, Journal Year: 2024, Volume and Issue: 17(24), P. 6446 - 6446

Published: Dec. 21, 2024

Spent coffee grounds (SCGs), a by-product of brewing, have high application potential. However, their moisture content complicates conventional conversion without energy-intensive drying. This study explores new route to convert SCGs high-carbon bioproducts, such as hydrochar and bio-oil, through hydrothermal processing. The effect the processing variables, i.e., temperature, residence time, binary solvent reaction medium, on distribution resultant bioproducts was investigated. quality fabricated analyzed by means instrumental techniques EA, ATR-FTIR, GC-MS, GC-TCD-FID. Two dominant fractions were liquid bio-oil solid hydrochar. highest char yield (39 wt.%) observed under milder conditions (low T short times), while more severe led an increase in formation, which reached maximum 46 wt.%. resulting bio-oils similar quality, presenting carbon (71–74 energetic values (approximately 35 MJ/kg). Also, hydrochars showed noticeable energy densification compared raw materials, where C HHV up 73.8 wt.% 30 MJ/kg, respectively. addition co-solvent water improves result enhanced stabilization reactive intermediates.

Language: Английский

Enhancing energy recovery: Integrating two-stage anaerobic co-digestion and hydrothermal liquefaction of organic solid waste and fecal sludge DOI
Md Khalekuzzaman, Nusrat Jahan, Mehedi Hasan

et al.

Fuel, Journal Year: 2025, Volume and Issue: 386, P. 134276 - 134276

Published: Jan. 8, 2025

Language: Английский

Citations

0
Bio-crude and biochar production and properties from corn stover at low energy-intensive hydrothermal liquefaction DOI

Isaac Nava-Bravo,

Carlos Escamilla‐Alvarado, José J. Cano‐Gómez

et al.

Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 8, 2024

Language: Английский

Citations

3
High-Energy-Density Hydrochar and Bio-Oil from Hydrothermal Processing of Spent Coffee Grounds—Experimental Investigation DOI Creative Commons
Mariusz Wądrzyk, Jakub Katerla, Rafał Janus

et al.

Energies, Journal Year: 2024, Volume and Issue: 17(24), P. 6446 - 6446

Published: Dec. 21, 2024

Spent coffee grounds (SCGs), a by-product of brewing, have high application potential. However, their moisture content complicates conventional conversion without energy-intensive drying. This study explores new route to convert SCGs high-carbon bioproducts, such as hydrochar and bio-oil, through hydrothermal processing. The effect the processing variables, i.e., temperature, residence time, binary solvent reaction medium, on distribution resultant bioproducts was investigated. quality fabricated analyzed by means instrumental techniques EA, ATR-FTIR, GC-MS, GC-TCD-FID. Two dominant fractions were liquid bio-oil solid hydrochar. highest char yield (39 wt.%) observed under milder conditions (low T short times), while more severe led an increase in formation, which reached maximum 46 wt.%. resulting bio-oils similar quality, presenting carbon (71–74 energetic values (approximately 35 MJ/kg). Also, hydrochars showed noticeable energy densification compared raw materials, where C HHV up 73.8 wt.% 30 MJ/kg, respectively. addition co-solvent water improves result enhanced stabilization reactive intermediates.

Language: Английский

Citations

0