Spent coffee grounds as a versatile source of green energy

Spent Coffee Grounds as a Versatile Source of Green Energy Spent Coffee Grounds as a Versatile Source of Green Energy Scientific Seminar Le Ngoc Hoang Anh Hanoi, 05th Octorbor 2020 01 INTRODUCTION 02 MATERIALS AND METHODS 03 RESULTS AND DISCUSSION 04 CONCLUSION 2 OUTLINE 3 Biodiesel is a good alternative for fossil fuel INTRODUCTION However, biodiesel is more expensive than fossil fuels 4 INTRODUCTION Coffee powder Beverage Brewed Coffee powder waste Extraction with hexaneether Triglycerides So.

Spent Coffee Grounds as a Versatile Source of Green Energy Scientific Seminar Le Ngoc Hoang Anh th Hanoi, Hanoi, 05 05th Octorbor Octorbor 2020 2020 OUTLINE INTRODUCTIO N MATERIALS AND METHODS RESULTS AND DISCUSSION CONCLUSION INTRODUCTION However, biodiesel is more expensive than fossil fuels Biodiesel is a good alternative for fossil fuel INTRODUCTION Coffee powder Beverage Brewed Coffee powder waste Extraction with hexane/ether Triglycerides Solid waste Glycerin Biodiesel Ethanol Fuel pellets Figure Schematic representation of the biodiesel production process from spent coffee grounds The other value-added products such as H2, ethanol, and fuel pellets can also be achieved from this waste feedstock MATERIALS AND METHODS Oil Extraction Transesterification Process Characterization MATERIALS AND METHODS Oil Extraction Refluxed Filtered (Buckner funnel) Separated FFAs Separated (rotary evaporator) characterized & quantified (HPLC) MATERIALS AND METHODS Transesterification Process MATERIALS AND METHODS Characterization The yield and composition of the biodiesel were investigated using HPLC (High performance liquid chromatography) RESULTS AND DISCUSSION A small amount of FFA, monoglycerides (MG), and diglycerides (DG) was also observed in the oil Figure HPLC chromatogram of the oil extracted from spent coffee grounds indicating the presence of TG, a small amount of DG, MG, and FFA 10 RESULTS AND DISCUSSION Source Advantage Disadvantage Tallow, brown grease, pork fat (white grease), lard, fish oil, poultry fat Animal fat oxidative stability, less expensive High sulfur content, high FFA (50%90%) bad odor, bad cold flow properties, high cloud point, high pour point, transportation costs, purification required Used Used vegetable vegetable oil oil Vegetable Vegetable oil oil less less expensive, expensive, readily available readily available Bad Bad ofor, ofor, high high FFA FFA Less expensive, higher Less expensive, higher stability, well-established stability, well-established transportation, pleasant transportation, pleasant smell smell Extraction of oil from spent coffee Extraction of oil from spent coffee grounds required grounds required Coffee oil Coffee oil Amount (million gallons/year) 2.92 2.92 Table Comparison of Coffee Oil with Other Waste Feedstock for Biodiesel Production The quality of the coffee oil as feedstock for biodiesel production was a better quality and cost-effective as compared to other waste sources available to date 11 RESULTS AND DISCUSSION GC-MS analysis showed the presence of C18-C16 methyl esters of fatty acids, where more than 99% of the total composition was methyl esters of palmitic acid (51.4%), linoleic acid (40.3%), and stearic acid (8.3%) Figure GC analysis of the biodiesel shows the different methyl esters of fatty acids present in the biodiesel produced from the used coffee grounds The presence of various methyl esters in coffee biodiesel obtained by MS is shown in the inset table (spectra not shown) 12 RESULTS AND DISCUSSION The analysis of the results shows that biodiesel obtained from spent coffee grounds is a strong candidate as an alternative to diesel Table ASTM Results for the Coffee Biodiesel RESULTS AND DISCUSSION  Coffee grounds could still be used as compost for the garden and/or as fuel pellets  A profit of more than $8 million/year, if both biodiesel and pellets can be marketed 14 CONCLUSION - ≈ 15% of the oil obtained from spent coffee grounds was converted to biodiesel with 100% yield - Spent coffee grounds can be used as a potential source to produce quality biodiesel and fuel pellets, this biodiesel can be used industrially as an alternative to diesel Spent coffee ground THANK YOU! 15 ANY QUESTION? ... TG, a small amount of DG, MG, and FFA 10 RESULTS AND DISCUSSION Source Advantage Disadvantage Tallow, brown grease, pork fat (white grease), lard, fish oil, poultry fat Animal fat oxidative stability,... pleasant transportation, pleasant smell smell Extraction of oil from spent coffee Extraction of oil from spent coffee grounds required grounds required Coffee oil Coffee oil Amount (million gallons/year)... Characterization MATERIALS AND METHODS Oil Extraction Refluxed Filtered (Buckner funnel) Separated FFAs Separated (rotary evaporator) characterized & quantified (HPLC) MATERIALS AND METHODS Transesterification