Optimum energy analysis of separation and purification units for bioethanol production by the use of lignocellulose feedstock

2021 ◽  
Author(s):  
Ahmad Hajinezhad ◽  
Mojtaba Lak ◽  
Hamed Alimoradiyan
Keyword(s):  
Energy Analysis ◽  
Bioethanol Production ◽  
Separation And Purification ◽  
Optimum Energy ◽  
Lignocellulose Feedstock

Modeling and energy analysis of the fuel bioethanol production from sweet sorghum using very high gravity (VHG) conditions

2015 ◽  
Author(s):  
Valeria Larnaudie ◽  
Mario Daniel Ferrari ◽  
Claudia Lareo
Keyword(s):  
Sweet Sorghum ◽  
Energy Analysis ◽  
High Gravity ◽  
Bioethanol Production ◽  
Very High Gravity ◽  
Very High

Net energy analysis of bioethanol production system from high-yield rice plant in Japan

2010 ◽  
Vol 87 (7) ◽  
pp. 2164-2168 ◽  
Author(s):  
Kiyotaka Saga ◽  
Kenji Imou ◽  
Shinya Yokoyama ◽  
Tomoaki Minowa
Keyword(s):  
Production System ◽  
Rice Plant ◽  
Energy Analysis ◽  
High Yield ◽  
Net Energy ◽  
Bioethanol Production

Net Energy Analysis of Molasses Based Bioethanol Production in Indonesia

2019 ◽  
Vol 2 (1) ◽  
pp. 25-30
Author(s):  
Carrin Aprinada ◽  
Irvan S. Kartawiria ◽  
Evita H. Legowo
Keyword(s):  
Total Energy ◽  
Energy Analysis ◽  
Energy Content ◽  
Energy Requirement ◽  
Net Energy ◽  
Evaporation Process ◽  
Bioethanol Production ◽  
Distillation Process ◽  
Monthly Basis ◽  
Plant Capacity

Molasses is mostly used as feedstock for the bioethanol production in Indonesia. Bioethanol industries has the potential to be more developed if the mandate of blending gasoline with 5% bioethanol is implemented. However, some previous studies abroad have shown that mostly the net energy for producing bioethanol is negative. The main purpose of this research is to analyze the net energy requirement if a bioethanol conversion plant from scenario of a bioethanol producer in East Java. Bioethanol conversion processes inside the plant are pre-fermentation, fermentation, evaporation, distillation and dehydration. Method which was used in this research are modelling and calculation made on monthly basis for plant capacity of 30,000 KL/ year ethanol of 99.5% purity. The result shows that the total energy required to produce 1 L of ethanol is 4.55 MJ. The energy content of 1 L ethanol is 23.46 MJ. The largest energy requirement is for evaporation process (62%) followed by distillation process (33%). Thus, the net energy requirement for bioethanol production process is positive.

Process Simulation Integrated Life Cycle Net Energy Analysis and GHG Assessment of Fuel-Grade Bioethanol Production from Unutilized Rice Straw

2021 ◽  
Author(s):  
Piyumali Mewanthika Jayasundara ◽  
Thisara Kaveendra Jayasinghe ◽  
Mahinsasa Rathnayake
Keyword(s):  
Life Cycle ◽  
Rice Straw ◽  
Process Simulation ◽  
Energy Analysis ◽  
Life Stage ◽  
Energy Gain ◽  
Allocation Rule ◽  
Production Plant ◽  
Net Energy ◽  
Bioethanol Production

Abstract The life cycle stage of paddy rice cultivation can be excluded with a zero-inventory allocation rule for the life cycle scenario of bioethanol production from unutilized rice straw, i.e., rice straw with no applied valorization in current practice. Accordingly, this study evaluates the life cycle net energy analysis and greenhouse gas (GHG) assessment for a scaled-up bioethanol production plant using unutilized rice straw as the feedstock. The process simulation technique is integrated to model a scaled-up production plant to produce bioethanol at 99.7 vol% purity from unutilized rice straw, and the simulation results are retrieved to calculate inventory data for life cycle assessment (LCA). The simulated mass flow and energy flow results are comparable with that of real plants, reported in the published literature, which validates the process simulations in this study. Inclusive of energy generation using the waste flows in the process (i.e., wastewater and solid residues), the life cycle net energy analysis results show a net energy gain of 7,804.0 MJ/m3 of bioethanol with a net renewable energy gain of 38,230.9 MJ/m3 of bioethanol that corresponds to a net energy ratio of 1.20 and renewability factor of 5.49. The life cycle GHG assessment exhibits a net global warming potential of 584.8 kg CO2 eq./m3 of bioethanol. The effect of system boundary expansion up to the end-of-life stage as gasohol (E10), the sensitivity of the key process parameters, and the economic benefit via valorization of unutilized rice straw are further analyzed and discussed.

scholarly journals Bioethanol Production from Renewable Raw Materials and its Separation and Purification: a Review

2018 ◽  
Vol 56 (3) ◽  
Author(s):  
Arijana Bušić ◽  
◽  
Nenad Marđetko ◽  
Semjon Kundas ◽  
Galina Morzak ◽  
...  
Keyword(s):  
Raw Materials ◽  
Bioethanol Production ◽  
Separation And Purification ◽  
Renewable Raw Materials

scholarly journals Treatment of Waste Paper Using Ultrasound and Sodium Hydroxide for Bioethanol Production

2018 ◽  
Vol 12 (1) ◽  
pp. 108-114
Author(s):  
Osama F. Saeed ◽  
Rafid Abdulkareem ◽  
Shatha Muallah
Keyword(s):  
Sodium Hydroxide ◽  
Fossil Fuels ◽  
Treatment Time ◽  
Waste Paper ◽  
Cellulolytic Enzymes ◽  
Bioethanol Production ◽  
Hydrolysis Process ◽  
Wide Range ◽  
Cellulomonas Uda ◽  
Lignocellulose Feedstock

Bioethanol produced from lignocellulose feedstock is a renewable substitute to declining fossil fuels. Pretreatment using ultrasound assisted alkaline was investigated to enhance the enzyme digestibility of waste paper. The pretreatment was conducted over a wide range of conditions including waste paper concentrations of 1-5%, reaction time of 10-30 min and temperatures of 30-70°C. The optimum conditions were 4 % substrate loading with 25 min treatment time at 60°C where maximum reducing sugar obtained was 1.89 g/L. Hydrolysis process was conducted with a crude cellulolytic enzymes produced by Cellulomonas uda (PTCC 1259).The maximum amount of sugar released and hydrolysis efficiency were 20.92 g/L and 78.4 %, respectively. Sugars released from waste paper were fermented into bioethanol with Saccharomyces cerevisiae. The maximum concentration of bioethanol estimated was 9.5 g/L after 48h of cultivation, the yield and volumetric productivity were 0.454 g/g glucose and 0.2g bioethanol/ L h. respectively. This study of ultrasound and sodium hydroxide treatment may be (we think) it will be a promising technique to develop bioethanol production from waste paper.

scholarly journals Energy Analysis of Cassava Bioethanol Production in the Philippines

2014 ◽  
Vol 93 (3) ◽  
pp. 301-309
Author(s):  
Ralph Kristoffer B. GALLEGOS ◽  
Delfin C. SUMINISTRADO ◽  
Jessie C. ELAURIA ◽  
Marilyn M. ELAURIA
Keyword(s):  
Energy Analysis ◽  
The Philippines ◽  
Bioethanol Production

A General Method for Spectrometer Design in the Scoff Approximation

1976 ◽  
Vol 34 ◽  
pp. 538-539
Author(s):  
J. R. Fields
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Energy Analysis ◽  
Incident Beam ◽  
Scanning Transmission Electron Microscope ◽  
Chemical Identification ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
General Method

The energy analysis of electrons scattered by a specimen in a scanning transmission electron microscope can improve contrast as well as aid in chemical identification. In so far as energy analysis is useful, one would like to be able to design a spectrometer which is tailored to his particular needs. In our own case, we require a spectrometer which will accept a parallel incident beam and which will focus the electrons in both the median and perpendicular planes. In addition, since we intend to follow the spectrometer by a detector array rather than a single energy selecting slit, we need as great a dispersion as possible. Therefore, we would like to follow our spectrometer by a magnifying lens. Consequently, the line along which electrons of varying energy are dispersed must be normal to the direction of the central ray at the spectrometer exit.

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