scholarly journals A Critical Analysis of Bio-Hydrocarbon Production in Bacteria: Current Challenges and Future Directions

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2663 ◽  
Author(s):  
Ziaur Rahman ◽  
Javed Nawab ◽  
Bong Hyun Sung ◽  
Sun Chang Kim
Keyword(s):  
Energy Demand ◽  
Fossil Fuels ◽  
Metabolic Networks ◽  
High Energy ◽  
Biofuel Production ◽  
Next Generation ◽  
Future Directions ◽  
Hydrocarbon Production ◽  
High Yields ◽  
Generation Biofuel

As global fossil reserves are abruptly diminishing, there is a great need for bioenergy. Renewable and sustainable bioenergy products such as biofuels could fulfill the global energy demand, while minimizing global warming. Next-generation biofuels produced by engineered microorganisms are economical and do not rely on edible resources. The ideal biofuels are alcohols and n-alkanes, as they mimic the molecules in fossil fuels and possess high energy densities. Alcohols and n-alkane hydrocarbons (C2 to C18) have been produced using engineered microorganisms. However, it is difficult to optimize the complex metabolic networks in engineered microorganisms to obtain these valuable bio-hydrocarbons in high yields. Metabolic engineering results in drastic and adverse cellular changes that minimize production yield in microbes. Here, we provide an overview of the progress in next-generation biofuel (alcohols and n-alkanes) production in various engineered microorganisms and discuss the latest tools for strain development that improve biofuel production.

scholarly journals Conversion of biomass to biofuels and life cycle assessment: a review

2021 ◽  
Author(s):  
Ahmed I. Osman ◽  
Neha Mehta ◽  
Ahmed M. Elgarahy ◽  
Amer Al-Hinai ◽  
Ala’a H. Al-Muhtaseb ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Biomass Conversion ◽  
Biofuel Production ◽  
Process Efficiency ◽  
Liquid Fuels ◽  
Thermochemical Processes ◽  
Lower Temperature

AbstractThe global energy demand is projected to rise by almost 28% by 2040 compared to current levels. Biomass is a promising energy source for producing either solid or liquid fuels. Biofuels are alternatives to fossil fuels to reduce anthropogenic greenhouse gas emissions. Nonetheless, policy decisions for biofuels should be based on evidence that biofuels are produced in a sustainable manner. To this end, life cycle assessment (LCA) provides information on environmental impacts associated with biofuel production chains. Here, we review advances in biomass conversion to biofuels and their environmental impact by life cycle assessment. Processes are gasification, combustion, pyrolysis, enzymatic hydrolysis routes and fermentation. Thermochemical processes are classified into low temperature, below 300 °C, and high temperature, higher than 300 °C, i.e. gasification, combustion and pyrolysis. Pyrolysis is promising because it operates at a relatively lower temperature of up to 500 °C, compared to gasification, which operates at 800–1300 °C. We focus on 1) the drawbacks and advantages of the thermochemical and biochemical conversion routes of biomass into various fuels and the possibility of integrating these routes for better process efficiency; 2) methodological approaches and key findings from 40 LCA studies on biomass to biofuel conversion pathways published from 2019 to 2021; and 3) bibliometric trends and knowledge gaps in biomass conversion into biofuels using thermochemical and biochemical routes. The integration of hydrothermal and biochemical routes is promising for the circular economy.

scholarly journals Analysis of Energy System in Norway with Focus on Energy Consumption Prediction

2017 ◽  
Vol 9 (1) ◽  
pp. 5-14 ◽  
Author(s):  
Maryam Hamlehdar ◽  
Alireza Aslani
Keyword(s):  
Energy Consumption ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Electricity Consumption ◽  
Energy System ◽  
High Energy ◽  
Regression Result ◽  
Industry Growth ◽  
The Status

Abstract Today, the fossil fuels have dominant share of energy supply in order to respond to the high energy demand in the world. Norway is one of the countries with rich sources of fossil fuels and renewable energy sources. The current work is to investigate on the status of energy demand in Norway. First, energy and electricity consumption in various sectors, including industrial, residential are calculated. Then, energy demand in Norway is forecasted by using available tools. After that, the relationship between energy consumption in Norway with Basic economics parameters such as GDP, population and industry growth rate has determined by using linear regression model. Finally, the regression result shows a low correlation between variables.

Aluminum Remelting using Directly Solar-Heated Rotary Kilns

2001 ◽  
Vol 123 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Karl-Heinz Funken ◽  
Martin Roeb ◽  
Peter Schwarzboezl ◽  
Heiko Warnecke
Keyword(s):  
Energy Demand ◽  
Fossil Fuels ◽  
High Energy ◽  
Solar Furnace ◽  
Exhaust Gas ◽  
Gas Streams ◽  
Temperature Heat ◽  
Concentrated Solar Radiation ◽  
Rotary Kilns ◽  
Gas Volume

To check the feasibility of solar thermal remelting of aluminum scrap a directly absorbing rotary kiln receiver-reactor was constructed for experimentation in a mini-plant scale in the DLR high flux solar furnace. Conventionally the high energy demand for heating rotary kilns is met by the combustion of fossil fuels. This procedure generates a big exhaust gas volume which is contaminated by volatiles if the technology is applied to treat waste materials. Application of concentrated solar radiation to provide the high temperature heat enables to substitute the fossil fuel. Thus smaller off-gas streams are generated and lower investment and O&M cost are expected for the off-gas purification. In this paper market and environmental issues are discussed and pre-designs both for solar pilot and industrial scale applications are presented.

Implications of Nanotechnology into Next Generation Biofuel Industry

2015 ◽  
pp. 452-476
Author(s):  
Matthew S. Muroski ◽  
Om V. Singh
Keyword(s):  
Carbon Nanotube ◽  
Fossil Fuels ◽  
Woody Biomass ◽  
Catalyst Design ◽  
Next Generation ◽  
Enzymatic Production ◽  
Research Areas ◽  
Biofuel Industry ◽  
Alternative Sources ◽  
Generation Biofuel

Biofuels are emerging as integral and necessary research areas towards clean, next generation energy production, while providing alternative sources of sustainability. In addition to advancements in nanotechnology, many obstacles remain on the way for producing economically viable biofuels such as the challenges involved in the breakdown of cellulose, hemicelluloses, and lignin found in woody biomass. The use of micro-algae as a feedstock in biofuel has already been impacted by the advancements of nanotechnology. However, interdisciplinary breakthroughs are needed to make biofuels viable contenders as replacements for traditional fossil fuels. The authors discuss recent advances, benefits, and challenges facing nanotechnology in accordance with furthering our understanding and improving the state of biofuel manufacturing, including the implementation of nanotechnology in other aspects of biofuels production, such as cracking catalyst design, carbon nanotube electrodes for fuel cells, and enzymatic production of biofuels.

Transgenicism in algae: Challenges in compatibility, global scenario and future prospects for next generation biofuel production

2022 ◽  
Vol 154 ◽  
pp. 111829
Author(s):  
B. Bharathiraja ◽  
J. Iyyappan ◽  
M. Gopinath ◽  
J. Jayamuthunagai ◽  
R. PraveenKumar
Keyword(s):  
Biofuel Production ◽  
Next Generation ◽  
Future Prospects ◽  
Generation Biofuel

scholarly journals Computational Approaches for Microalgal Biofuel Optimization: A Review

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Joseph Koussa ◽  
Amphun Chaiboonchoe ◽  
Kourosh Salehi-Ashtiani
Keyword(s):  
Fossil Fuels ◽  
Metabolic Networks ◽  
Target Genes ◽  
Renewable Energy Sources ◽  
Deep Understanding ◽  
Biological Data ◽  
Economic Feasibility ◽  
Production Optimization ◽  
Biofuel Production ◽  
Metabolic System

The increased demand and consumption of fossil fuels have raised interest in finding renewable energy sources throughout the globe. Much focus has been placed on optimizing microorganisms and primarily microalgae, to efficiently produce compounds that can substitute for fossil fuels. However, the path to achieving economic feasibility is likely to require strain optimization through using available tools and technologies in the fields of systems and synthetic biology. Such approaches invoke a deep understanding of the metabolic networks of the organisms and their genomic and proteomic profiles. The advent of next generation sequencing and other high throughput methods has led to a major increase in availability of biological data. Integration of such disparate data can help define the emergent metabolic system properties, which is of crucial importance in addressing biofuel production optimization. Herein, we review major computational tools and approaches developed and used in order to potentially identify target genes, pathways, and reactions of particular interest to biofuel production in algae. As the use of these tools and approaches has not been fully implemented in algal biofuel research, the aim of this review is to highlight the potential utility of these resources toward their future implementation in algal research.

Integration of next-generation biofuel production in the Swedish forest industry – A geographically explicit approach

2015 ◽  
Vol 154 ◽  
pp. 317-332 ◽  
Author(s):  
Karin Pettersson ◽  
Elisabeth Wetterlund ◽  
Dimitris Athanassiadis ◽  
Robert Lundmark ◽  
Christian Ehn ◽  
...  
Keyword(s):  
Biofuel Production ◽  
Forest Industry ◽  
Next Generation ◽  
Explicit Approach ◽  
Generation Biofuel
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