Should Biomass be Used for Power Generation or Hydrogen Production?

2006 ◽  
Vol 129 (3) ◽  
pp. 629-636 ◽  
Author(s):  
Alessandro Corradetti ◽  
Umberto Desideri
Keyword(s):  
Power Generation ◽  
Hydrogen Production ◽  
Electrical Energy ◽  
Biomass Gasification ◽  
Gas Production ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Thermodynamic Efficiency ◽  
Gas Generation ◽  
Steam Methane

In the last several years, gasification has become an interesting option for biomass utilization because the produced gas can be used as a gaseous fuel in different applications or burned in a gas turbine for power generation with a high thermodynamic efficiency. In this paper, a technoeconomic analysis was carried out in order to evaluate performance and cost of biomass gasification systems integrated with two different types of plant, respectively, for hydrogen production and for power generation. An indirectly heated fluidized bed gasifier has been chosen for gas generation in both cases, and experimental data have been used to simulate the behavior of the gasifier. The hydrogen plant is characterized by the installation of a steam methane reformer and a shift reactor after the gas production and cleanup section; hydrogen is then purified in a pressure swing adsorption system. All these components have been modeled following typical operating conditions found in hydrogen plants. Simulations have been performed to optimize thermal interactions between the biomass gasification section and the gas processing. The power plant consists of a gas-steam combined cycle, with a three-pressure-levels bottoming cycle. A sensitivity analysis allowed to evaluate the economic convenience of the two plants as a function of the costs of the hydrogen and electrical energy.

Should Biomass Be Used for Power Generation or Hydrogen Production?

2005 ◽  
Author(s):  
Alessandro Corradetti ◽  
Umberto Desideri
Keyword(s):  
Power Generation ◽  
Hydrogen Production ◽  
Electrical Energy ◽  
Biomass Gasification ◽  
Gas Production ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Thermodynamic Efficiency ◽  
Gas Generation ◽  
Steam Methane

In the last years gasification has become an interesting option for biomass utilization, since the produced gas can be used as a gaseous fuel in different applications or burnt in a gas turbine for power generation with a high thermodynamic efficiency. In this paper a techno-economic analysis was carried out in order to evaluate performance and cost of biomass gasification systems integrated with two different types of plant, respectively for hydrogen production and for power generation. An indirectly heated fluidized bed gasifier has been chosen for gas generation in both cases and experimental data have been used to simulate the behavior of the gasifier. The hydrogen plant is characterized by the installation of a steam methane reformer and a shift reactor after the gas production and clean-up section; hydrogen is then purified in a pressure swing adsorption system. All these components have been modeled following typical operating conditions found in hydrogen plants. Simulations have been performed to optimize thermal interactions between the biomass gasification section and the gas processing. The power plant consists of a gas-steam combined cycle, with a three pressure levels bottoming cycle. A sensitivity analysis allowed to evaluate the economic convenience of the two plants as a function of the costs of the hydrogen and electrical energy.

Comparative Analysis of Advanced H2/Air Cycle Power Plants Based on Different Hydrogen Production Systems From Fossil Fuels

2004 ◽  
Author(s):  
M. Gambini ◽  
M. Vellini
Keyword(s):  
Hydrogen Production ◽  
Power Plants ◽  
Fossil Fuels ◽  
Coal Gasification ◽  
Fossil Fuel ◽  
H2 Production ◽  
Combined Cycle ◽  
Methane Reforming ◽  
Steam Methane Reforming ◽  
Steam Methane

In this paper two options for H2 production by means of fossil fuels are presented, evaluating their performance when integrated with advanced H2/air cycles. The investigation has been developed with reference to two different schemes, representative both of consolidated technology (combined cycle power plants) and of innovative technology (a new advance mixed cycle, named AMC). The two methods, here considered, to produce H2 are: • coal gasification: it permits transformation of a solid fuel into a gaseous one, by means of partial combustion reactions; • steam-methane reforming: it is the simplest and potentially the most economic method for producing hydrogen in the foreseeable future. These hydrogen production plants require material and energy integrations with the power section, and the best connections must be investigated in order to obtain good overall performance. The main results of the performed investigation are quite variable among the different H2 production options here considered: for example the efficiency value is over 34% for power plants coupled with coal decarbonization system, while it is in a range of 45–48% for power plants coupled with natural gas decarbonization. These differences are similar to those attainable by advanced combined cycle power plants fuelled by natural gas (traditional CC) and coal (IGCC). In other words, the decarbonization of different fossil fuels involves the same efficiency penalty related to the use of different fossil fuel in advanced cycle power plants (from CC to IGCC for example). The CO2 specific emissions depend on the fossil fuel type and the overall efficiency: adopting a removal efficiency of 90% in the CO2 absorption systems, the CO2 emission reduction is 87% and 82% in the coal gasification and in the steam-methane reforming respectively.

Performance Modeling of Unfired Steam Cycle Using Single and Dual Pressure Once-Through Steam Generator

2011 ◽  
Author(s):  
Emad Hamid ◽  
Mike Newby ◽  
Pericles Pilidis
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Low Cost ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Low Carbon ◽  
Performance Simulation ◽  
Actual Performance ◽  
Combined Cycle Power Plant ◽  
Steam Cycle

The high thermal efficiency and the use of low carbon content fuel (e.g., natural gas) have made the Combined Cycle Power Plant (CCPP) one of the best choices for power generation due to its benefits associate with low cost and low environmental impact. The performance of Unfired Steam Cycle (USC) as a part of the CCPP has significant impact on the performance of the whole power plant as it provides the CCPP with around one third of the total useful power. An accurate performance simulation of the USC is therefore necessary to analyze the effects of various operating parameters on the performance of combined cycle power plant. In this paper, a performance simulation approach for an unfired steam cycle using single and dual pressure-level of an OTSG is presented. The developed modeling method has been applied to the performance simulation of an existing unfired steam cycle power generation unit installed at Manx Electricity Authority and the results are promising. A comparison between simulated and actual performance at design and off design operating conditions of the same USC has shown a remarkable agreement with errors values below 1%.

Study of the Effect of the Operating Conditions on the MCFC-Biomass Gasification Power Generation System

2014 ◽  
Vol 953-954 ◽  
pp. 317-320
Author(s):  
Ai Guo Liu ◽  
Bing Wang ◽  
Kai Liu ◽  
Cheng Jun Wang
Keyword(s):  
Power Generation ◽  
Hybrid System ◽  
System Performance ◽  
Biomass Gasification ◽  
Operating Conditions ◽  
Inlet Temperature ◽  
Molten Carbonate ◽  
Generation System ◽  
Operation Conditions ◽  
Power Generation System

The combination of biomass gasification and molten carbonate fuel/micro-gas turbine (MCFC/MGT) hybrid system offers great potential as a future sustainable power generation system. A numerical model of a 100 kW classic MCFC/MGT hybrid system using biomass syngas as fuel has been developed. The simulation was performed to investigate the influence of operation conditions and the syngas compositions on the system performance. The results show that the MCFC/MGT can keep its performance when using syngas gas as fuel which confirms the feasibility of biomass gasification-MCFC/MGT hybrid system. According to the simulation results, the increase of MGT pressure ration and MCFC inlet temperature positively affects the system performance, the fluctuation of syngas composition has little effects on the system.

AN OVERVIEW OF HYDROGEN FUEL FROM BIOMASS GASIFICATION - COST EFFECTIVE ENERGY FOR DEVELOPING ECONOMY

2021 ◽  
Vol 36 (1) ◽  
pp. 42-52
Author(s):  
F. N Osuolale ◽  
K. A. Babatunde ◽  
O.O Agbede ◽  
A. F Olawuni ◽  
A.J Fatukasi ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Cost Effective ◽  
Biomass Gasification ◽  
Operating Conditions ◽  
Thermochemical Conversion ◽  
Gasification Process ◽  
Product Gas ◽  
Economic Process ◽  
Percentage Yield ◽  
Different Sources

Hydrogen has the potential to be a clean and sustainable alternative to fossil fuel especially if it is produced from renewable sources such as biomass. Gasification is the thermochemical conversion of biomass to a mixture of gases including hydrogen. The percentage yield of each constituent of the mixture is a function of some factors. This article highlights various parameters such as operating conditions; gasifier type; biomass type and composition; and gasification agents that influence the yield of hydrogen in the product gas. Economic evaluation of hydrogen from different sources was also presented. The hydrogen production from gasification process appears to be the most economic process amongst other hydrogen production processes considered. The process has the potential to be developed as an alternative to the conventional hydrogen production process.

H Gas Turbine Combined Cycle Technology and Development Status

1996 ◽  
Author(s):  
James C. Corman
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Environmental Control ◽  
Cooling System ◽  
Pressure Ratio ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Significant Advance ◽  
Single Digit ◽  
Cycle System

A revolutionary step has been taken in the development of the Next Advance in Power Generation Systems — “H” Technology Combined Cycle. This new gas turbine combined cycle system increases thermal performance to the 60% level by increasing gas turbine operating conditions to 2600°F (1430°C) at a pressure ratio of 23 to 1. This represents a significant increase in operating temperature for the gas turbine. However, the potential for single digit NOx levels (based upon 15% O2 in the exhaust) has been retained. The combined effect of performance increase and environmental control is achieved by an innovative closed loop steam cooling system which tightly integrated the gas turbine and steam turbine cycles. Although a significant advance has been taken in performance, the new power generation system has been configured with a substantial number of proven concepts and technology programs are ongoing to validate the new features. The technical activities which support the introduction of the new turbine system have reached a point in the development cycle where the results are integrated into the design methods. This has permitted the “H” Technology to achieve a design readiness status and the first unit will be under test in late 1997.

scholarly journals Biomass Gasification Process with Catalyst

2020 ◽  
Vol 06 (09) ◽  
pp. 38-53
Author(s):  
H Musfer
Keyword(s):  
Power Generation ◽  
Chemical Process ◽  
Biomass Gasification ◽  
Operating Conditions ◽  
Low Energy ◽  
Fuel Gas ◽  
Heavy Hydrocarbons ◽  
Gasification Process ◽  
Endothermic Reactions ◽  
Secondary Cracking

Gasification is a thermo-chemical process used to convert biomass fuelsinto a fuel gas. Biomass gasification is considered amongst the best methods to enhance biomass-based energy production’s efficiency as it allows common biomass utilization.It has become more important as a mean of converting low energy-density such as biomass feeds or into a transportable high value gas for heat and power generation, chemicals and fuels. Operating conditions are affecting the gasification reactions. the review identified that in high-temperature gasification, endothermic reactions the secondary cracking and reforming of heavy hydrocarbons are favored and hence enhances the whole process’s efficiency. Finally, catalysts are vital for the biomass gasification process, and it is important to select the appropriate ones taking into consideration possible setbacks discussed above and will be explored further in this study.

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