The Experts below are selected from a list of 86616 Experts worldwide ranked by ideXlab platform
Mazlan Abdul Wahid - One of the best experts on this subject based on the ideXlab platform.
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Development of Biogas combustion in combined heat and power generation
Renewable and Sustainable Energy Reviews, 2014Co-Authors: S.e. Hosseini, Mazlan Abdul WahidAbstract:Based on the Biogas feedstock and its generation cycle, a considerable part of Biogas ingradients are noncombustible gases. Low calorific value (LCV) of Biogas is one of the most important barriers of Biogas development in the combined heat and power (CHP) generation. Biogas purification is usually performed in sensitive utilizations, however modification methods such as cryogenic and membrain are not economic. Therefore, new methods of Biogas utilization should be experimented. In this study, characteristics of Biogas are investigated under various combustion regimes such as Biogas conventional combustion, hydrogen-enriched Biogas traditional combustion, Biogas flameless mode and hydrogen-enriched Biogas flameless combustion. Since Biogas conventional combustion is not well-sustained due to LCV of Biogas, hydrogen addition to the Biogas components could improve combustion stability however NOx formation increases. Although flameless combustion of fosil fuel have been developed, few documents could be found about Biogas flameless mode. Flameless combustion of Biogas could be one of the best methods of pure Biogas utilization in CHP generation. Combustion stability and low pollutant formation are the main advantages of Biogas flameless combustion. The initial cost of flameless combustion instalation is high due to the cost of instrumentation and special equipments. In order to maintain the temperature inside the flameless chamber, some especial materials such as ceramic should be utilized. Biogas flameless combustion could be modified by hydrogen-enrichment strategy. The temperature distribution inside the flameless chamber is more uniform when small amounts of hydrogen added to the Biogas components and the flameless regime is more sustained. In this circumstance the rate of pollutant formation is a little higher than pure Biogas flameless combustion. ?? 2014 Elsevier Ltd.
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Biogas utilization: Experimental investigation on Biogas flameless combustion in lab-scale furnace
Energy Conversion and Management, 2013Co-Authors: S.e. Hosseini, Mazlan Abdul WahidAbstract:Biogas generated in the anaerobic digestion of biomass and organic wastes by micro-organisms can be applied for heating, transportation and power generation as a renewable energy source. However, low calorific value (LCV) of Biogas is one the most important bottlenecks of Biogas conversion into electrical or thermal energy. Indeed, the presence of corrosive gases such as H2S and water vapor in Biogas components makes some dilemmas in Biogas purification and utilization. In order to obtain the efficient Biogas utilization method, different Biogas resources, physical and chemical properties of Biogas and Biogas combustion characteristics should be considered. In this paper Biogas was utilized in lab-scale flameless combustion furnace and the performance of flameless combustion chamber fueled by Biogas has been presented. Results demonstrated that flameless combustion is one of the best feasible strategies for Biogas utilization. Uniformity of temperature in the flameless furnace increases the durability of refractory and related equipment. Simplicity of the flameless burner, pollutant formation reduction and fuel consumption decreases are the main causes of Biogas flameless combustion supremacy.
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Biogas Flameless Combustion: A Review
Applied Mechanics and Materials, 2013Co-Authors: S.e. Hosseini, Mazlan Abdul Wahid, Abuelnuor A. A. AbuelnuorAbstract:Biogas which is produced by the anaerobic digestion of biomass and organic wastes by micro-organisms is biodegradable. Biogas is a type of renewable energy sources that can be used for lighting, heating, and transportation and small-scale power generations. Although it seems that Biogas is not economical due to its low calorific values, various investigations have been conducted by various researchers. Flameless combustion of fossil fuel was introduced during last decade and it has been proven that it could be the best technique for Biogas combustion due to its low production of NOx pollution. In this paper, the review of Biogas, its resources, and the utilization of Biogas on flameless combustion is illustrated.
S.e. Hosseini - One of the best experts on this subject based on the ideXlab platform.
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Development of Biogas combustion in combined heat and power generation
Renewable and Sustainable Energy Reviews, 2014Co-Authors: S.e. Hosseini, Mazlan Abdul WahidAbstract:Based on the Biogas feedstock and its generation cycle, a considerable part of Biogas ingradients are noncombustible gases. Low calorific value (LCV) of Biogas is one of the most important barriers of Biogas development in the combined heat and power (CHP) generation. Biogas purification is usually performed in sensitive utilizations, however modification methods such as cryogenic and membrain are not economic. Therefore, new methods of Biogas utilization should be experimented. In this study, characteristics of Biogas are investigated under various combustion regimes such as Biogas conventional combustion, hydrogen-enriched Biogas traditional combustion, Biogas flameless mode and hydrogen-enriched Biogas flameless combustion. Since Biogas conventional combustion is not well-sustained due to LCV of Biogas, hydrogen addition to the Biogas components could improve combustion stability however NOx formation increases. Although flameless combustion of fosil fuel have been developed, few documents could be found about Biogas flameless mode. Flameless combustion of Biogas could be one of the best methods of pure Biogas utilization in CHP generation. Combustion stability and low pollutant formation are the main advantages of Biogas flameless combustion. The initial cost of flameless combustion instalation is high due to the cost of instrumentation and special equipments. In order to maintain the temperature inside the flameless chamber, some especial materials such as ceramic should be utilized. Biogas flameless combustion could be modified by hydrogen-enrichment strategy. The temperature distribution inside the flameless chamber is more uniform when small amounts of hydrogen added to the Biogas components and the flameless regime is more sustained. In this circumstance the rate of pollutant formation is a little higher than pure Biogas flameless combustion. ?? 2014 Elsevier Ltd.
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Biogas utilization: Experimental investigation on Biogas flameless combustion in lab-scale furnace
Energy Conversion and Management, 2013Co-Authors: S.e. Hosseini, Mazlan Abdul WahidAbstract:Biogas generated in the anaerobic digestion of biomass and organic wastes by micro-organisms can be applied for heating, transportation and power generation as a renewable energy source. However, low calorific value (LCV) of Biogas is one the most important bottlenecks of Biogas conversion into electrical or thermal energy. Indeed, the presence of corrosive gases such as H2S and water vapor in Biogas components makes some dilemmas in Biogas purification and utilization. In order to obtain the efficient Biogas utilization method, different Biogas resources, physical and chemical properties of Biogas and Biogas combustion characteristics should be considered. In this paper Biogas was utilized in lab-scale flameless combustion furnace and the performance of flameless combustion chamber fueled by Biogas has been presented. Results demonstrated that flameless combustion is one of the best feasible strategies for Biogas utilization. Uniformity of temperature in the flameless furnace increases the durability of refractory and related equipment. Simplicity of the flameless burner, pollutant formation reduction and fuel consumption decreases are the main causes of Biogas flameless combustion supremacy.
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Biogas Flameless Combustion: A Review
Applied Mechanics and Materials, 2013Co-Authors: S.e. Hosseini, Mazlan Abdul Wahid, Abuelnuor A. A. AbuelnuorAbstract:Biogas which is produced by the anaerobic digestion of biomass and organic wastes by micro-organisms is biodegradable. Biogas is a type of renewable energy sources that can be used for lighting, heating, and transportation and small-scale power generations. Although it seems that Biogas is not economical due to its low calorific values, various investigations have been conducted by various researchers. Flameless combustion of fossil fuel was introduced during last decade and it has been proven that it could be the best technique for Biogas combustion due to its low production of NOx pollution. In this paper, the review of Biogas, its resources, and the utilization of Biogas on flameless combustion is illustrated.
Lucie Moeller - One of the best experts on this subject based on the ideXlab platform.
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Foam formation in full-scale Biogas plants processing biogenic waste
Energy Sustainability and Society, 2015Co-Authors: Lucie Moeller, Kati GörschAbstract:Background The proportion of Biogas in the mix of renewable energies is still remarkably high. The process of anaerobic digestion (AD) provides the basis of Biogas production but often leads to excessive foaming. Identifying the reasons for foaming is difficult for Biogas plant operators because many factors may play a role. It is therefore difficult for laboratory research to give answers to this specific problem, as the consistency of the digestate itself plays a crucial part in the foam formation process. Hence, careful investigation of foaming in full-scale Biogas plants is important in order to identify the main causes and to develop strategies for the prevention of foaming. Methods Fifteen operators of Biogas plants treating biogenic waste have been reviewed in order to estimate the frequency of foaming events in full-scale Biogas plants. Samples from foaming digestates were subsequently analyzed. Seven foaming periods in five Biogas plants were investigated closely in order to ascertain the causes of foaming events. Results It was noted that 80% of surveyed Biogas plants have had excessive foam formation during the AD process. The foam of two wastewater-treating Biogas plants contained filamentous microorganisms. An abrupt temperature increase and the use of grain products and yeasts were identified to be the reason for foaming in four cases. It was, however, not possible to identify the real causes of the foaming event in two cases. Conclusions Foam formation is a common phenomenon in waste-processing Biogas plants. It is important to identify the reasons for foaming because this knowledge helps Biogas plant operators to prevent foam formation in the future.
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Comparative review of foam formation in Biogas plants and ruminant bloat
Energy Sustainability and Society, 2012Co-Authors: Lucie Moeller, Kati Goersch, Juergen Neuhaus, Andreas Zehnsdorf, Roland Arno MuellerAbstract:This review gives an overview of the current knowledge concerning the problem of foam formation in the process of anaerobic digestion in Biogas plants that utilize renewable resources or biogenic waste material for Biogas production. Process upsets in Biogas production induced by foam formation can have a negative impact on the efficiency of Biogas plants. The foam can block gas pipes and cause severe damage to the bioreactor equipment, ranging from a failure of the feeders to a damage of the roof of the Biogas plant. The most common foam removal methods - stirring in the foam, adding anti-foaming agents, diminishing substrate feeding, and altering the Biogas reactor management - are not always successful. However, the reasons for the excessive foam formation during the Biogas production process have not yet been elucidated in detail. In contrast, foam building in the rumen of ruminants as a cause for bloat has been studied thoroughly. In general, the interaction between proteins, polysaccharides (mucilage), and small plant particles is assumed to be the crucial factor. As the fermentation process in the rumen has many similarities with the Biogas production process, the current research results on bloat in ruminants are summarized and compared with the process of foaming in Biogas plants.
Kati Görsch - One of the best experts on this subject based on the ideXlab platform.
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Foam formation in full-scale Biogas plants processing biogenic waste
Energy Sustainability and Society, 2015Co-Authors: Lucie Moeller, Kati GörschAbstract:Background The proportion of Biogas in the mix of renewable energies is still remarkably high. The process of anaerobic digestion (AD) provides the basis of Biogas production but often leads to excessive foaming. Identifying the reasons for foaming is difficult for Biogas plant operators because many factors may play a role. It is therefore difficult for laboratory research to give answers to this specific problem, as the consistency of the digestate itself plays a crucial part in the foam formation process. Hence, careful investigation of foaming in full-scale Biogas plants is important in order to identify the main causes and to develop strategies for the prevention of foaming. Methods Fifteen operators of Biogas plants treating biogenic waste have been reviewed in order to estimate the frequency of foaming events in full-scale Biogas plants. Samples from foaming digestates were subsequently analyzed. Seven foaming periods in five Biogas plants were investigated closely in order to ascertain the causes of foaming events. Results It was noted that 80% of surveyed Biogas plants have had excessive foam formation during the AD process. The foam of two wastewater-treating Biogas plants contained filamentous microorganisms. An abrupt temperature increase and the use of grain products and yeasts were identified to be the reason for foaming in four cases. It was, however, not possible to identify the real causes of the foaming event in two cases. Conclusions Foam formation is a common phenomenon in waste-processing Biogas plants. It is important to identify the reasons for foaming because this knowledge helps Biogas plant operators to prevent foam formation in the future.
Yongzhong Feng - One of the best experts on this subject based on the ideXlab platform.
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household Biogas use in rural china a study of opportunities and constraints
Renewable & Sustainable Energy Reviews, 2010Co-Authors: Yu Chen, Gaihe Yang, Sandra Sweeney, Yongzhong FengAbstract:As a renewable energy, Biogas is not only an important part of the development of rural new energy, but also an important aspect of sustainable development in China. The development process and present status of household Biogas, specifically the opportunities and constraints of household Biogas in rural China, are discussed in this paper. Only about 19% of the Biogas potential has been utilized in rural China. There are several opportunities for household Biogas development in rural China, including the problem of rural household energy consumption, the availability of Biogas fermentation materials, national financial subsidies, legal and international clean development mechanisms. Also, more research needs to be done in straw fermentation and cold fermentation technology. Training should be conducted to raise the level of Biogas customers in comprehensive Biogas utilization. Measures should be taken to improve the follow-up services and management of Biogas plants. The information presented in this paper will be helpful not only to the sustainable development of household Biogas in rural China, but also to the development of Biogas in similar countries around the world.
