Energy conversion performances during biomass air gasification process under microwave irradiation

2022 ◽  
Author(s):  
Cunfeng Ke ◽  
Ce Shi ◽  
Yaning Zhang ◽  
Mengmeng Guang ◽  
Bingxi Li
Keyword(s):  
Microwave Irradiation ◽  
Energy Conversion ◽  
Gasification Process

Energy and Exergy Analysis on Gasification Processes

2015 ◽  
pp. 199-240
Author(s):  
Edgardo Olivares Gómez ◽  
Renato Cruz Neves ◽  
Elisa Magalhães de Medeiros ◽  
Mylene Cristina Alves Ferreira Rezende
Keyword(s):  
Energy Conversion ◽  
Thermodynamic Analysis ◽  
Chemical Reaction ◽  
Exergy Analysis ◽  
Gasification Process ◽  
Efficiency Assessment ◽  
Energy And Exergy ◽  
Thermochemical Processes ◽  
Energy And Exergy Analysis

In recent years, attention has focused on exergy analysis, a type of thermodynamic analysis which is an important tool for the efficiency assessment and the processes optimization when dealing with energy conversion and, particularly, thermochemical processes such as gasification. Thus, this chapter aims to introduce the fundamental concepts of energy and exergy and describe the energy and exergy evaluation tools, elucidating its importance for calculations applied to gasification processes. A case study was performed to show the proposal of energy and exergy analysis. Therefore, a single global gasification chemical reaction was used to represent the gasification process. This analysis can provide a tool to assess and develop models, simulations, calculations, and to optimize real gasification processes. Information and experiences covered in this chapter help to be put into perspective the technology, research and overcoming of challenges.

Energy and Exergy Analysis on Gasification Processes

2017 ◽  
pp. 1613-1646
Author(s):  
Edgardo Olivares Gómez ◽  
Renato Cruz Neves ◽  
Elisa Magalhães de Medeiros ◽  
Mylene Cristina Alves Ferreira Rezende
Keyword(s):  
Energy Conversion ◽  
Thermodynamic Analysis ◽  
Chemical Reaction ◽  
Exergy Analysis ◽  
Gasification Process ◽  
Efficiency Assessment ◽  
Energy And Exergy ◽  
Thermochemical Processes ◽  
Energy And Exergy Analysis

In recent years, attention has focused on exergy analysis, a type of thermodynamic analysis which is an important tool for the efficiency assessment and the processes optimization when dealing with energy conversion and, particularly, thermochemical processes such as gasification. Thus, this chapter aims to introduce the fundamental concepts of energy and exergy and describe the energy and exergy evaluation tools, elucidating its importance for calculations applied to gasification processes. A case study was performed to show the proposal of energy and exergy analysis. Therefore, a single global gasification chemical reaction was used to represent the gasification process. This analysis can provide a tool to assess and develop models, simulations, calculations, and to optimize real gasification processes. Information and experiences covered in this chapter help to be put into perspective the technology, research and overcoming of challenges.

Air-Steam Gasification of Dairy Biomass Using Small Scale Fixed Bed Gasifier

2009 ◽  
Author(s):  
Gerardo Gordillo ◽  
Kalyan Annamalai
Keyword(s):  
Energy Conversion ◽  
Fixed Bed ◽  
Energy Conversion Efficiency ◽  
Steam Gasification ◽  
Small Scale ◽  
Gasification Process ◽  
Green Power ◽  
Endothermic Process ◽  
Conversion Efficiencies ◽  
Rich Mixtures

The composition of gases obtained from gasification of biomass fuels depends principally upon parameters like fuel and oxidizing medium supplied, equivalence ratio (Φ), steam-fuel ratio (S:F), pressure, reaction temperature, and residence time in the gasifier. Gasification with steam only is an endothermic process which produces rich mixtures of CO and H2 while gasification with air-steam may not require heat input in order to produce H2 rich mixtures of CO and CO2. Furthermore, gases produced by gasification with-air-steam can be supplied to a shift reactor to produce mixtures of H2, CO2, and N2. When pure O2 is used instead of air, the H2 separated from CO2 can be used for in situ sustainable green power generation. The gasification process can handle low quality fuel and larger sized particles. While coal has higher fixed carbon (FC) providing more heat for gasification, the Dairy biomass (DB) selected in current study has lower FC and hence contributes less heat. While most of the past studies deal with gasification of coal, current study concentrates on DB as fuel. Experimental results are presented for gasification of i) dairy biomass (DB) and ii) DB ash blends (DBAB) using a 10 KW fixed bed counter-flow gasifier and air-steam as oxidizing source. The results show that the reactor operates almost adiabatically. The effects of the Φ and S:F ratio on peak temperatures, gas composition, gross heating value of the products (HHV), and energy conversion efficiency (ECE) are investigated. A mass spectrometer has been used to analyze the composition of gases in real time continuously. Increasing Φ or S:F increases the production of H2 and CO2 but decreases the production of CO; thus, the reaction of CO+H2O→CO2+H2 seems to control the composition of gases. The operating parameters include 1.59<Φ<6.36 and 0.36<S:F<0.8. Energy Conversion efficiencies (ECE) range from 0.26 to 0.80.

scholarly journals Evaluation of the Bioenergy Potential of Temer Musa: An Invasive Tree from the African Desert

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Nikdalila Radenahmad ◽  
Md Sumon Reza ◽  
Muhammad Saifullah Abu Bakar ◽  
Shahriar Shams ◽  
Alem Tesfai ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Calorific Value ◽  
Volatile Matter ◽  
Environment Friendly ◽  
Gasification Process ◽  
Invasive Tree ◽  
Wild Tree ◽  
The Usa ◽  
Ash Formation ◽  
Value Measurement

Temer musa (Prosopis chilensis) is an invasive wild tree found in the desert of many countries, e.g., Eritrea, Ethiopia, Sudan, India, South Africa, and the USA. The thermochemical properties of this invasive tree were analyzed as a potential biomass feedstock for energy generation. The calorific value measurement of the temer musa wood was found to be 19.83 MJ/kg. Thermogravimetric analysis and derivative weight profiles displayed that the decomposition happened in four stages representing moisture content, volatile matter, fixed carbon, and ash formation. The proximate parameters are in good range with other known biomasses and are found suitable for the thermochemical energy conversion. The gasification process confirmed the existence of several gases that are usually observed in invasive biomasses. All gasification gases were in the acceptable range, and no hydrogen sulfide gas was observed, which makes the conversion as environment friendly. The obtained results show that the energy conversion of temer musa is suitable for real-time implementation.

scholarly journals Electricity generation and atmospheric pollution: The role of solid fuels gasification

2013 ◽  
Vol 3 (3) ◽  
pp. 171-178
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Solid Fuel ◽  
Electricity Generation ◽  
Pollution Abatement ◽  
Energy Conversion Efficiency ◽  
Combined Cycle ◽  
Solid Fuels ◽  
Integrated Gasification Combined Cycle ◽  
Gasification Process

Electricity generation in solid fuel fired power stations is currently the main source of flying particulates and greenhouse gases emissions. Environmental pollution is expected to deteriorate dramatically in the coming century unless pollution abatement technologies for solid fuels energy conversion will be applied. The Integrated Gasification Combined Cycle (IGCC) system, currently under industrial testing, provides for high solid fuel energy conversion efficiency (e.g. ~ 45 %) and favors the application of proven technologies for gas purification (e.g. H2S oxidation to elemental sulfur, CO2 separation and disposal as a stable carbonate solid). Additionally, gasification combined with fuel cell technology (CGFC) may provide in the long run, for energy conversion efficiency well over 50%. This article reports also the results of pilot plant lignite gasification tests for the production of a medium heating value synthesis gas using a novel indirect heat (allothermal) gasification process (ALLOGAS). The latter process employs an indirect heat rotary kiln gasifier and is considered as the most appropriate to gasify moist lignite with the minimum pretreatment.

Artificial cells containing sustainable energy conversion engines

2019 ◽  
Vol 3 (5) ◽  
pp. 573-578 ◽  
Author(s):  
Kwanwoo Shin
Keyword(s):  
Energy Conversion ◽  
Nicotinamide Adenine Dinucleotide ◽  
Sustainable Energy ◽  
Living Cells ◽  
Energy Transduction ◽  
Artificial Cells ◽  
Energy Conversion Process ◽  
Metabolic Reactions ◽  
Metabolic Activities ◽  
Reduced Nicotinamide Adenine Dinucleotide

Living cells naturally maintain a variety of metabolic reactions via energy conversion mechanisms that are coupled to proton transfer across cell membranes, thereby producing energy-rich compounds. Until now, researchers have been unable to maintain continuous biochemical reactions in artificially engineered cells, mainly due to the lack of mechanisms that generate energy-rich resources, such as adenosine triphosphate (ATP) and reduced nicotinamide adenine dinucleotide (NADH). If these metabolic activities in artificial cells are to be sustained, reliable energy transduction strategies must be realized. In this perspective, this article discusses the development of an artificially engineered cell containing a sustainable energy conversion process.

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