scholarly journals Energy balances in the production and end use of alcohols derived from biomass. A fuels-specific comparative analysis of alternate ethanol production cycles

1980 ◽  
Author(s):  
Not Given Author
Keyword(s):  
Comparative Analysis ◽  
Ethanol Production ◽  
Production Cycles ◽  
End Use ◽  
Energy Balances

scholarly journals Transformation of energy balances with dominant coal consumption in European economies and Turkey in the years 1990–2017

2019 ◽  
Vol 10 (4) ◽  
pp. 627-647 ◽  
Author(s):  
Izabela Jonek-Kowalska
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Comparative Analysis ◽  
Energy Balance ◽  
Nuclear Energy ◽  
European Countries ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Coal Consumption ◽  
Energy Balances

Research background: Energy policy is closely linked to economic development. Therefore, its optimization is an important issue especially in the contemporary European environmental conditions.  EU regulations enforce a reduction of carbon dioxide emissions and the abandonment of non-renewable energy resources. Instead, they promote renewable energy sources. In this way, new legal and environmental circumstances are becoming the main reason for the transformation of energy balances, which is a real economic and technological challenge. This transformation requires a strategic and effective approach, especially in those countries which until now have used mainly hard coal in the energy sector. Purpose of the article: According to above justification, the main purpose of the article is to identify the strategies for the transformation of energy balances that were implemented in the years 1990–2017 by chosen European countries and Turkey. Methods: The study period covers the years 1990–2017, and the subject of the research at first applies to all European countries, and then to 7 countries selected due to their high share of bituminous coal in energy balance in the first year of the analysis, treated as the initial point of transformation (1990). As a result of this selection, 6 EU members and Turkey with the largest share of coal in energy production in the year 1990 are examined. Particularly, an analysis of the trends in their energy balances in the years 1990–2017 is conducted. The research uses data on non-renewable energy consumption and renewable energy resources and the total energy consumption. The research methodology includes: analysis of the structure and dynamics, evaluation of trends and comparative analysis and presentation of development strategies. At the end of the article, a comparative analysis is carried out, the economic consequences of identified changes are assessed, and recommendations are formulated aimed at optimizing the structure of the energy balance in the future. Findings & Value added: Generally, there are four theoretical and empirical patterns of transformation strategies of energy balances with dominant coal consumption: 1) using other non-renewable energy resources; 2) replacing non-renewable energy resources with renewable ones; 3) using nuclear energy instead of coal; 4) increasing coal consumption as available and efficient energy resource. It was found that the examined countries implement mainly the strategy in which the decreasing share of coal is made up for by an increasing share of gas. Additionally, we can observe an increase in the share of nuclear energy in France, the Czech Republic and the United Kingdom. In Spain and Germany, despite the use of nuclear power plants for the production of energy, the share of nuclear energy in the energy balances has systematically decreased in time. In all analyzed countries, we can also observe an increasing share of renewable sources in energy balances, however, this growth is very slow.

scholarly journals A Comparative Analysis of Annual Market Investments in Energy Supply and End-Use Technologies

2013 ◽  
pp. 332-346
Author(s):  
Charlie Wilson ◽  
Arnulf Grubler ◽  
Arnulf Grübler ◽  
Charlie Wilson
Keyword(s):  
Comparative Analysis ◽  
Energy Supply ◽  
End Use

Effects of integrating a bioethanol production process to a kraft pulp mill

2010 ◽  
Vol 25 (2) ◽  
pp. 233-242 ◽  
Author(s):  
Jesse Kautto ◽  
Kaj Henricson ◽  
Herbert Sixta ◽  
Mikaela Trogen ◽  
Raimo Alén
Keyword(s):  
Production Process ◽  
Ethanol Production ◽  
Kraft Pulp ◽  
Black Liquor ◽  
Pulp Mill ◽  
Simulation Software ◽  
Kraft Pulp Mill ◽  
Excess Power ◽  
Energy Balances ◽  
Wood Consumption

Abstract The integration of an ethanol production process based on prehydrolysis of softwood chips to a kraft pulp mill is discussed. A simulation model of this biorefinery has been created with WinGEMS simulation software to calculate the mass and energy balances of the biorefinery and to examine the effects of the integration on the operation of the pulp mill. Integrating the prehydrolysis process to the modeled pulp mill producing 1000 Adt/day of pine pulp would increase the wood consumption by 16%. With the increased wood consumption, 40 t/day of ethanol could be produced, and the excess power production could be increased by 460 MWh/day. The integration of the ethanol production process to a pulp mill would have considerable effects on the operation of the pulp mill. The coupling of hydrolyzate evaporation with black liquor evaporation would require major modifications in the evaporation plant. Due to the burning of organic residue from the ethanol process and to the increase in the heating value of black liquor, the load on the recovery boiler would increase by 31%.

Comparative analysis of key technologies for cellulosic ethanol production from Brazilian sugarcane bagasse at a commercial scale

2019 ◽  
Vol 13 (4) ◽  
pp. 994-1014 ◽  
Author(s):  
Anuj K Chandel ◽  
Juliana Q Albarelli ◽  
Diego T Santos ◽  
Shishir Ps Chundawat ◽  
Munish Puri ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Ethanol Production ◽  
Sugarcane Bagasse ◽  
Cellulosic Ethanol ◽  
Commercial Scale ◽  
Key Technologies

scholarly journals Comparative analysis of maize hybrides grown for bioethanol production purposes

2012 ◽  
pp. 11-14
Author(s):  
Lívia Bánszki
Keyword(s):  
Comparative Analysis ◽  
Ethanol Production ◽  
Starch Content ◽  
Weather Conditions ◽  
The Other ◽  
Bioethanol Production ◽  
Lower Content ◽  
Maize Hybrids ◽  
Main Components ◽  
Starch Yield

The objective of this study was to evaluate the effects of crop year on the main components of maize grown for bio-ethanol production yield, starch content and starch yield per hectare of maize hybrids were investigated in a droughty (2007) and in a favourable years with optimal weather conditions (2008, 2009). We measured very low starch yield (1.5 t ha-1) in the year with unfavourable precipitation supply (2007) together with higher starch content (73%). In the case of good precipitation supply we measured a much higher starch yield per hectare (7.7 t ha-1) with lower content (72.4%). In 2009 the starch content (74.5%) exceed the results of the two previous years, but on the other hand the average of starch yield was (4.9 t ha-1) which falls between the other two years values.

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