scholarly journals Direct biodiesel production from wet spent coffee grounds

RSC Advances ◽  
2019 ◽  
Vol 9 (60) ◽  
pp. 35109-35116 ◽  
Author(s):  
Juliati Br. Tarigan ◽  
Mimpin Ginting ◽  
Siti Nurul Mubarokah ◽  
Firman Sebayang ◽  
Justaman Karo-karo ◽  
...  
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Biodiesel Production ◽  
Reactive Extraction ◽  
Spent Coffee Grounds ◽  
Short Reaction Time ◽  
Coffee Grounds

Here, we demonstrate the direct biodiesel production from wet SCG in mild reaction temperature and short reaction time using reactive extraction Soxhlet (RES) method.

scholarly journals Process optimization for biodiesel production from neutralized waste cooking oil and the effect of this biodiesel on engine performance

2018 ◽  
Vol 8 (1) ◽  
pp. 121-127 ◽  
Author(s):  
Tanzer Eryilmaz
Keyword(s):  
Reaction Time ◽  
Methyl Ester ◽  
Reaction Temperature ◽  
Direct Injection ◽  
Engine Performance ◽  
Waste Cooking Oil ◽  
Biodiesel Production ◽  
Phase Reaction ◽  
Optimum Conditions ◽  
Cooking Oils

In this study, the methyl ester production process from neutralized waste cooking oils is optimized by using alkali-catalyzed (KOH) single-phase reaction. The optimization process is performed depending on the parameters, such as catalyst concentration, methanol/oil ratio, reaction temperature and reaction time. The optimum methyl ester conversion efficiency was 90.1% at the optimum conditions of 0.7 wt% of potassium hydroxide, 25 wt% methanol/oil ratio, 90 min reaction time and 60°C reaction temperature. After the fuel characteristics of the methyl ester obtained under optimum conditions were determined, the effect on engine performance, CO and NOx emissions of methyl ester was investigated in a diesel engine with a single cylinder and direct injection. When compared to diesel fuel, engine power and torque decreased when using methyl ester, and specific fuel consumption increased. NOx emission increases at a rate of 18.4% on average through use of methyl ester.

Potential biodiesel production from Brazilian plant oils and spent coffee grounds by Beauveria bassiana lipase 1 expressed in Aspergillus nidulans A773 using different agroindustry inputs

2020 ◽  
Vol 256 ◽  
pp. 120513 ◽  
Author(s):  
Enrico Cerioni Spiropulos Gonçalves ◽  
Malena Martínez Pérez ◽  
Ana Claudia Vici ◽  
Jose Carlos Santos Salgado ◽  
Mariana de Souza Rocha ◽  
...  
Keyword(s):  
Aspergillus Nidulans ◽  
Beauveria Bassiana ◽  
Biodiesel Production ◽  
Plant Oils ◽  
Spent Coffee Grounds ◽  
Coffee Grounds

Biodiesel production by direct transesterification of wet spent coffee grounds using switchable solvent as a catalyst and solvent

2020 ◽  
Vol 296 ◽  
pp. 122334 ◽  
Author(s):  
Hoang Chinh Nguyen ◽  
My Linh Nguyen ◽  
Fu-Ming Wang ◽  
Horng-Yi Juan ◽  
Chia-Hung Su
Keyword(s):  
Biodiesel Production ◽  
Spent Coffee Grounds ◽  
Direct Transesterification ◽  
Coffee Grounds

scholarly journals Biodiesel Production from Spent Coffee Grounds

2017 ◽  
Vol 25 (40) ◽  
pp. 113-121 ◽  
Author(s):  
Lenka Blinová ◽  
Alica Bartošová ◽  
Maroš Sirotiak
Keyword(s):  
Organic Solvents ◽  
Oil Extraction ◽  
Waste Material ◽  
Biodiesel Production ◽  
Spent Coffee Grounds ◽  
Drying Oil ◽  
Biodiesel Feedstock ◽  
Coffee Grounds ◽  
Coffee Oil

Abstract The residue after brewing the spent coffee grounds is an oil-containing waste material having a potential of being used as biodiesel feedstock. Biodiesel production from the waste coffee grounds oil involves collection and transportation of coffee residue, drying, oil extraction, and finally production of biodiesel. Different methods of oil extraction with organic solvents under different conditions show significant differences in the extraction yields. In the manufacturing of biodiesel from coffee oil, the level of reaction completion strongly depends on the quality of the feedstock oil. This paper presents an overview of oil extraction and a method of biodiesel production from spent coffee grounds.

scholarly journals Acid hydrolysis of spent coffee grounds: effects on possible prebiotic activity of oligosaccharides

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Fabrizio Sarghini ◽  
Francesco Marra ◽  
Angela De Vivo ◽  
Paola Vitaglione ◽  
Gianluigi Mauriello ◽  
...  
Keyword(s):  
Reaction Time ◽  
Acid Hydrolysis ◽  
High Resolution Mass Spectrometry ◽  
Water Soluble ◽  
Mass Spectrometry Analysis ◽  
Bacterial Strains ◽  
Spent Coffee Grounds ◽  
Prebiotic Activity ◽  
Coffee Grounds ◽  
Promising Source

Abstract Background Spent coffee grounds (SCG) are a promising source of natural by-products which can be used for different purposes. In this work, a possible use of oligosaccharides isolated from SCG as functional ingredients was investigated. SCGs were treated with an acid hydrolysis at high temperature (200 °C) in a closed reactor setting reaction time of 30, 60 and 90 s depending on the sample (original or defatted). A comprehensive study of the resulted water-soluble hydrolysate using a high-resolution mass spectrometry analysis was performed. Additionally, the growth of four Lactobacillus strains was tested to assess the prebiotic potential of the hydrolysate. Results Oligosaccharide chains formed by hexoses with a degree of polymerization ranging from 3 to 6 were identified and characterized. Regardless of the composition and the reaction time of hydrolysis, the bacterial activity of SCG extracts exhibited significantly higher values than the well-known versatile carbohydrate used by food industry, i.e., inulin. Conclusions The results pave the way toward the use of hydrolysate SCG as an innovative ingredient intended to fortify food formulations. The diversity in coffee oligosaccharides composition suggests their selective prebiotic activity for specific bacterial strains. Graphical Abstract

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