Air-blown circulating fluidized bed gasifiers are of interest because they produce a good quality, low calorific value (LCV) gas (4–6 MJ/Nm 3 ) and possess a very high carbon conversion efficiency while allowing high capacity, good tolerance to variations in fuel quality, and reliable operation. The high and homogeneously distributed temperatures and the use of particular bed materials, such as dolomite, favor tar cracking. Successful tar cracking can also be achieved using secondary circulating fluidized bed reactors. Also, successful tests on catalytic tar cracking have been performed, for example, by introducing nickel compounds into the gasifier. Sulfur control is made easier because of the significant reduction that can be achieved by adding limestone or dolomite to the gasifier bed. (more…)
The moisture content of the feedstock affects the gas composition and the energy balance of the process since gasification is an en ...
Thermo chemical processing of biomass yields gaseous, liquid, and solid products and offers a means of producing useful gaseous ...
A combination of legislation and technology has helped clean up many of the world’s coal-burning plants. Both developed and develop ...
Biomass Storage Biomass storage is required to ensure the continuous operation of the facility. To limit the space required for ...
Gasification is a thermo chemical process that has been exploited for more than a century for converting solid feedstocks to ga ...
The product gas can be burned in boilers to generate heat and raise steam, in internal combustion engines to generate electricity and heat at small to medium scale (from a few kilowatts to a few megawatts), and in gas turbines to generate electricity (Brayton cycle) and heat at small to large scale. In large-scale systems using gas turbines, the exhaust gas from the gas turbine can be used to raise steam in a heat recovery steam generator to generate additional electricity using a steam turbine (Rankine cycle), resulting in combined cycle operation. (more…)
Gasification is a thermo chemical process that has been exploited for more than a century for converting solid feedstocks to ga ...
The moisture content of the feedstock affects the gas composition and the energy balance of the process since gasification is an en ...
Biomass Storage Biomass storage is required to ensure the continuous operation of the facility. To limit the space required for ...
Natural gas and oil are common source energy used to give electricity. How efficient is coal if we compare to these other source of ...
Many characteristics of traditional engines make them attractive for use in power generation and propulsion technology. They tend t ...
Biomass Storage
Biomass storage is required to ensure the continuous operation of the facility. To limit the space required for storage at the plant site, biomass must be stored in relatively high piles. Two main problems associated with fuel storage are decomposition and selfheating. Self-heating increases the rate of decomposition and fire risk, and it encourages the growth of thermophilic fungi whose spores can cause a respiratory condition in humans similar to farmers lung. Some small virgin biomass losses may occur at the storage stage, but they are likely to be negligible. For intermediary storage of the fuel between the pretreatment (e.g., drying and sizing) and gasification stage, storage silos may be used. (more…)
The moisture content of the feedstock affects the gas composition and the energy balance of the process since gasification is an en ...
Thermo chemical processing of biomass yields gaseous, liquid, and solid products and offers a means of producing useful gaseous ...
A combination of legislation and technology has helped clean up many of the world’s coal-burning plants. Both developed and develop ...
Gasification is a thermo chemical process that has been exploited for more than a century for converting solid feedstocks to ga ...
The product gas can be burned in boilers to generate heat and raise steam, in internal combustion engines to generate electricity a ...
The moisture content of the feedstock affects the gas composition and the energy balance of the process since gasification is an endothermic process. Water vapor, however, is an essential component of gasification reactions. Therefore, there is a trade-off between the extent of fuel drying and the quality of product gas. Drying of the feedstock to a moisture content of approximately 15% is commonly adopted. Fuel drying is likely to be the most energy intensive activity in the biomass gasification process. Important contributions can be made to the energy balance by using flue gases or steam to dry the biomass. The heat used for drying does not have to be high temperature, and a low temperature level is actually desired because it will prevent the evaporation of undesirable organic components. (more…)
Biomass Storage Biomass storage is required to ensure the continuous operation of the facility. To limit the space required for ...
Air-blown circulating fluidized bed gasifiers are of interest because they produce a good quality, low calorific value (LCV) gas (4 ...
Thermo chemical processing of biomass yields gaseous, liquid, and solid products and offers a means of producing useful gaseous ...
A combination of legislation and technology has helped clean up many of the world’s coal-burning plants. Both developed and develop ...
Drying is one of the most important post harvest steps. It enhances the storage life of the crop products, minimizes losses during ...
Gasification is a thermo chemical process that has been exploited for more than a century for converting solid feedstocks to gaseous energy carriers. The first gasifier patent was issued in England at the end of the 18th century and producer gas from coal gasification was mainly used as lighting fuel throughout the 19th century. At the turn of the 20th century, the main use of producer gas, obtained essentially from coal, switched to electricity generation and automotive applications via internal combustion engines. The use of producer gas was gradually supplanted by the use of higher energy density liquid fuels and as a result confined to areas with expensive or unreliable supplies of petroleum fuels. (more…)
The product gas can be burned in boilers to generate heat and raise steam, in internal combustion engines to generate electricity a ...
Thermo chemical processing of biomass yields gaseous, liquid, and solid products and offers a means of producing useful gaseous ...
Biomass Storage Biomass storage is required to ensure the continuous operation of the facility. To limit the space required for ...
Estimation of the future technical potential of biomass as an energy source is dependent on assumptions with respect to land av ...
The moisture content of the feedstock affects the gas composition and the energy balance of the process since gasification is an en ...
Thermo chemical processing of biomass yields gaseous, liquid, and solid products and offers a means of producing useful gaseous and/or liquid fuels. Biomass gasification is a total degradation process consisting of a sequence of thermal and thermo chemical processes that converts practically all the carbon in the biomass to gaseous form, leaving an inert residue. The gas produced consists of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2), methane (CH4), and nitrogen (N2) (if air is used as the oxidizing agent) and contains impurities, such as small char particles, ash, tars, and oils. The solid residue will consist of ash (composed principally of the oxides of Ca, K, Na, Mg, and Si) and possibly carbon or char. (more…)
The moisture content of the feedstock affects the gas composition and the energy balance of the process since gasification is an en ...
Air-blown circulating fluidized bed gasifiers are of interest because they produce a good quality, low calorific value (LCV) gas (4 ...
Biomass Storage Biomass storage is required to ensure the continuous operation of the facility. To limit the space required for ...
Gasification is a thermo chemical process that has been exploited for more than a century for converting solid feedstocks to ga ...
A combination of legislation and technology has helped clean up many of the world’s coal-burning plants. Both developed and develop ...
Agricultural and forestry residues provide the largest proportion of biomass used for the production of biomas bioenergy. Some estimates suggest that globally available biomass role in the form of recoverable residues represents about 40 Ejyr -1, enough to meet 10% of the total present energy use of 406 Ejyr -1 . However, realizing this potential is limited by factors such as ease and cost of recovery and environmental concerns relating to sustainable land use practices. (more…)
Estimation of the future technical potential of biomass as an energy source is dependent on assumptions with respect to land av ...
The quantification of the actual reduction in green house gases sourcess emissions resulting from the substitution of fossil fu ...
Bioenergy produced from biomass is sometimes called a carbon-neutral energy source, because the same quantity of carbon released wh ...
To date, most discussion and research relating to the various of biomass role in mitigating CO2 emissions has been focused around i ...
Another large source of renewable carbon supplies is waste biomass. It consists of a wide range of materials and includes munic ...
To date, most discussion and research relating to the various of biomass role in mitigating CO2 emissions has been focused around its use as a fuel or as a sink. However, full utilization of the potential of biomass products, particularly from woody biomass, may provide significant opportunities. (more…)
Climate change caused by the enhanced greenhouse effect is one of the most significant global environmental issues. Increased emiss ...
Bioenergy produced from biomass is sometimes called a carbon-neutral energy source, because the same quantity of carbon released wh ...
The accumulation of carbon within a forest growth cycle can be considered in four stages. The initial establishment stage involves ...
The quantification of the actual reduction in green house gases sourcess emissions resulting from the substitution of fossil fu ...
Estimation of the future technical potential of biomass as an energy source is dependent on assumptions with respect to land av ...
The future development of energy crops, to the level at which they would replace residues as the major bioenergy fuel source, will be largely dependent on regional factors such as climate change and local energy requirements and emission factors, which will determine their environmental and financial viability. (more…)
Estimation of the future technical potential of biomass as an energy source is dependent on assumptions with respect to land av ...
Bioenergy produced from biomass is sometimes called a carbon-neutral energy source, because the same quantity of carbon released wh ...
Advances in biomass feedstock production are extremely important. These advances have the potential for reducing the final cost ...
Over the last decade, the number of countries researching the potential of biomass and bioenergy for energy services rose rapid ...
The accumulation of carbon within a forest growth cycle can be considered in four stages. The initial establishment stage involves ...
Climate change caused by the enhanced greenhouse effect is one of the most significant global environmental issues. Increased emissions of GHG to the atmosphere, most notably CO2 , are considered the main cause of global climate change. Increasing energy consumption, a reliance on fossil fuels to meet these needs, and deforestation related to land use change are the main sources of increasing atmospheric CO2. (more…)
Bioenergy produced from biomass is sometimes called a carbon-neutral energy source, because the same quantity of carbon released wh ...
To date, most discussion and research relating to the various of biomass role in mitigating CO2 emissions has been focused around i ...
Ten industry giants – with business operations spanning the utilities, manufacturing, chemicals and financial-services sector – joi ...
The quantification of the actual reduction in green house gases sourcess emissions resulting from the substitution of fossil fu ...
It is of interest to examine potential sources of greenhouse gases sources or atmospheric CO2 by analysis of the global distrib ...