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

Physical and mechanical properties of wood treated with chitosan-caffeine formulations DOI
Magdalena Woźniak, Jerzy Majka, Patrycja Kwaśniewska‐Sip

et al.

European Journal of Wood and Wood Products, Journal Year: 2025, Volume and Issue: 83(2)

Published: Feb. 19, 2025

Language: Английский

Citations

1
Valorization of Biodiesel Into Bio‐Based Plasticizers: Optimization of Epoxidized Fatty Acid Isobutyl Ester Production Using Response Surface Methodology and Artificial Neural Network DOI Open Access
Xiaojiang Liang, Haotian Fei,

Fengjiao Wu

et al.

European Journal of Lipid Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 9, 2025

ABSTRACT Biodiesel is a promising green chemical feedstock due to its renewability and sustainability. In this study, bio‐based plasticizers, epoxidized fatty acid isobutyl esters (Ep‐FABEs), were prepared using biodiesel as through combination of transesterification the formic autocatalytic method. The effects reaction temperature, time, FA/C═C molar ratio, H 2 O /C═C ratio on conversion oxirane (RCO) during epoxidation process investigated central composite design. Both response surface methodology (RSM) artificial neural network (ANN) models developed model optimize process. Comparative analysis revealed that ANN demonstrated superior predictive capabilities, with lower mean squared error (MSE), absolute (MAE), higher coefficient determination ( R ) compared RSM model. predicted an RCO 92%, which was closely aligned experimental value 91% under optimized conditions (reaction temperature 66°C, time 6.7 h, 0.35, 2.70). Additionally, physico‐chemical properties Ep‐FABEs further analyzed. These findings provide valuable insights into production plasticizers feedstock.

Language: Английский

Citations

0
Transformation of waste cooking oil into biodiesel in a microwave reactor using nickel-loaded graphitic biochar catalyst DOI
Rahul Mishra, Chi‐Min Shu,

Anjani R.K. Gollakota

et al.

Fuel, Journal Year: 2025, Volume and Issue: 397, P. 135369 - 135369

Published: April 18, 2025

Language: Английский

Citations

0
Useful Extracts from Coffee By-Products: A Brief Review DOI Creative Commons
Krystyna Pyrzyńska

Separations, Journal Year: 2024, Volume and Issue: 11(12), P. 334 - 334

Published: Nov. 21, 2024

The waste materials generated from the processing of coffee cherries are still rich in several bioactive compounds. Several studies highlight by-products as a valuable source for diverse applications, such biofuels, biopolymers, biocomposites, and natural antioxidants food, pharmaceuticals, cosmetics. development prospective strategies valorization wastes is goal sustainable circular bioeconomy, increasing added value these reducing environmental pollution. This brief overview describes recently proposed procedures extraction recovery functional ingredients diversity by-products. comparison between conventional alternative methods enables one to choose most suitable techniques valorizing given by-product.

Language: Английский

Citations

1
Synergetic strategy: upgrading fuel properties of waste starch composite fuels by blending torrefied spent coffee grounds DOI
Wei‐Hsin Chen, Guan-Hong Chen, Kuan-Ting Lee

et al.

Journal of the Taiwan Institute of Chemical Engineers, Journal Year: 2024, Volume and Issue: unknown, P. 105820 - 105820

Published: Dec. 1, 2024

Language: Английский

Citations

1
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