Coal Gasification Characteristics in a 2MWth Second-Generation PFB Gasifier

2005 ◽  
Author(s):  
Xiao Rui ◽  
Baosheng Jin ◽  
Yunquan Xiong ◽  
Yufeng Duan ◽  
Zhaoping Zhong ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Pilot Scale ◽  
Test Results ◽  
Fuel Gas ◽  
Gasification Process ◽  
Feasibility Research ◽  
Fluid Bed ◽  
Long Time ◽  
Run Test ◽  
Gasification Temperature

Coal gasification process and equipment feasibility research were carried out in a 2 MW thermal input pressurized spout-fluid bed pilot-scale gasifier and a long-time-run test was performed to study the effects of operating parameters on coal partial gasification behaviors. The test results have demonstrated the feasibility of the gasifier to provide suitable fuel gas and residual char for downstream system of 2G PFBC-CC. The concentration of methane decreased at higher gasification temperature due to the secondary cracking of methane while the carbon conversion increased, and the concentration of hydrogen increased with an increase of steam flow rate. The main experimental results were compared with those of pilot-scale facilities in the world.

Solution of Combustor Noise in a Coal Gasification Cogeneration Application of 100 MW-Class Combustion Turbines

1989 ◽  
Author(s):  
A. J. Scalzo ◽  
W. T. Sharkey ◽  
W. C. Emmerling
Keyword(s):  
Coal Gasification ◽  
Field Tests ◽  
Combustion Noise ◽  
Action Program ◽  
Test Results ◽  
Fuel Gas ◽  
Gasification Process ◽  
Engine Vibration ◽  
Noise Phenomenon ◽  
Synchronous Engine

The field conversion of two W501D5 combustion turbines to burn medium BTU fuel gas supplied by a DOW Chemical coal gasification process at Plaquemine, Louisiana resulted in excessive 105 Hz airborne sound and a corresponding unacceptable non-synchronous engine vibration when burning natural gas. A joint Westinghouse and DOW Chemical corrective action program is described including field tests. Test results indicated that the combustion noise phenomenon was related to the strength of the primary air scoop recirculation pattern and its compatibility with the fuel and steam momentum vectors. A design was selected that eliminated the non-synchronous combustion noise generated vibration and reduced the 100 Hz third-octave noise from 115 db to 97 db, an intensity reduction of 64 to 1.

Solution of Combustor Noise in a Coal Gasification Cogeneration Application of 100-MW-Class Combustion Turbines

1990 ◽  
Vol 112 (1) ◽  
pp. 38-43 ◽  
Author(s):  
A. J. Scalzo ◽  
W. T. Sharkey ◽  
W. C. Emmerling
Keyword(s):  
Natural Gas ◽  
Coal Gasification ◽  
Field Tests ◽  
Combustion Noise ◽  
Action Program ◽  
Test Results ◽  
Fuel Gas ◽  
Gasification Process ◽  
Engine Vibration ◽  
Noise Phenomenon

The field conversion of two W501D5 combustion turbines to burn medium Btu fuel gas supplied by a Dow Chemical coal gasification process at Plaquemine, LA resulted in excessive 105-Hz airborne sound and a corresponding unacceptable nonsynchronous engine vibration when burning natural gas. A joint Westinghouse and Dow Chemical corrective action program is described including field tests. Test results indicated that the combustion noise phenomenon was related to the strength of the primary air scoop recirculation pattern and its compatibility with the fuel and steam momentum vectors. A design was selected that eliminated the nonsynchronous combustion noise generated vibration and reduced the 100-Hz third-octave noise from 115 db to 97 db, an intensity reduction of 64 to 1.

scholarly journals Simulation of a Downdraft Gasifier for Production of Syngas from Different Biomass Feedstocks

2021 ◽  
Vol 5 (2) ◽  
pp. 20
Author(s):  
Mateus Paiva ◽  
Admilson Vieira ◽  
Helder T. Gomes ◽  
Paulo Brito
Keyword(s):  
Modeling And Simulation ◽  
Pilot Scale ◽  
Operating Conditions ◽  
Fuel Gas ◽  
Heating Value ◽  
Downdraft Gasifier ◽  
Process Operation ◽  
Independent Parameters ◽  
Gasification Temperature ◽  
Main Operating

In the evaluation of gasification processes, estimating the composition of the fuel gas for different conditions is fundamental to identify the best operating conditions. In this way, modeling and simulation of gasification provide an analysis of the process performance, allowing for resource and time savings in pilot-scale process operation, as it predicts the behavior and analyzes the effects of different variables on the process. Thus, the focus of this work was the modeling and simulation of biomass gasification processes using the UniSim Design chemical process software, in order to satisfactorily reproduce the operation behavior of a downdraft gasifier. The study was performed for two residual biomasses (forest and agricultural) in order to predict the produced syngas composition. The reactors simulated gasification by minimizing the free energy of Gibbs. The main operating parameters considered were the equivalence ratio (ER), steam to biomass ratio (SBR), and gasification temperature (independent variables). In the simulations, a sensitivity analysis was carried out, where the effects of these parameters on the composition of syngas, flow of syngas, and heating value (dependent variables) were studied, in order to maximize these three variables in the process with the choice of the best parameters of operation. The model is able to predict the performance of the gasifier and it is qualified to analyze the behavior of the independent parameters in the gasification results. With a temperature between 850 and 950 °C, SBR up to 0.2, and ER between 0.3 and 0.5, the best operating conditions are obtained for maximizing the composition of the syngas in CO and H2.

Development of a Heavy Duty GT Syngas Burner for IGCC Power Plant in Order to Enlarge the GT Operating Conditions

2006 ◽  
Author(s):  
Federico Bonzani ◽  
Paolo Gobbo
Keyword(s):  
Atmospheric Pressure ◽  
Coal Gasification ◽  
Working Condition ◽  
Operating Conditions ◽  
Test Results ◽  
Customer Requirements ◽  
Test Rig ◽  
Gasification Process ◽  
Fuel Flexibility ◽  
Current Design

In order to increase the fuel flexibility of the current design of the SynGas burner [4,5,6], Ansaldo Energia, since the growing requests of the market, performed a R&D financed project to use the SynGas fuel available as the unique fuel to feed the gas turbine. Therefore the new working condition to be fulfilled by the modified SynGas burner are the following: a) ignition; b) acceleration; c) loading at part load; d) change over from diffusion line to main SynGas line. To fulfill with new requirements, the standard V94.2K burners have been modified in order to operate from ignition up to the change over point with a SynGas mixture provided by the coal gasification process of a typical IGCC plant [7]. After the design phase, a experimental test campaign on the new design burner has been performed at atmospheric pressure. In order to validate the test results carried out at actual engine working conditions a further test campaign has been performed at the high pressure consistent with the test rig technical limitations [2.3]. The paper show the results carried out that are really promising to meet the customer requirements.

The Exergy Underground Coal Gasification Technology as a Source of Superior Fuel for Power Generation

2006 ◽  
Author(s):  
Michael S. Blinderman
Keyword(s):  
Power Generation ◽  
Power Plants ◽  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Fuel Gas ◽  
Gasification Process ◽  
Product Gas ◽  
Production Wells ◽  
Industrial Projects ◽  
Fossil Fuel Power Plants

Underground Coal Gasification (UCG) is a gasification process carried on in non-mined coal seams using injection and production wells drilled from the surface, converting coal in situ into a product gas usable for chemical processes and power generation. The UCG process developed, refined and practiced by Ergo Exergy Technologies is called the Exergy UCG Technology or εUCG® Technology. The εUCG technology is being applied in numerous power generation and chemical projects worldwide. These include power projects in South Africa (1,200 MWe), India (750 MWe), Pakistan, and Canada, as well as chemical projects in Australia and Canada. A number of εUCG based industrial projects are now at a feasibility stage in New Zealand, USA, and Europe. An example of εUCG application is the Chinchilla Project in Australia where the technology demonstrated continuous, consistent production of commercial quantities of quality fuel gas for over 30 months. The project is currently targeting a 24,000 barrel per day synthetic diesel plant based on εUCG syngas supply. The εUCG technology has demonstrated exceptional environmental performance. The εUCG methods and techniques of environmental management are an effective tool to ensure environmental protection during an industrial application. A εUCG-IGCC power plant will generate electricity at a much lower cost than existing or proposed fossil fuel power plants. CO2 emissions of the plant can be reduced to a level 55% less than those of a supercritical coal-fired plant and 25% less than the emissions of NG CC.

scholarly journals A Modified Gibbs Free Energy Minimisation Model for Fluid Bed Coal Gasification

2015 ◽  
Vol 36 (1) ◽  
pp. 73-87 ◽  
Author(s):  
Marek Ściążko ◽  
Leszek Stępień
Keyword(s):  
Large Scale ◽  
Coal Gasification ◽  
Heterogeneous Reactions ◽  
Boudouard Reaction ◽  
Quasi Equilibrium ◽  
Gaseous Species ◽  
Gasification Process ◽  
Energy Minimisation ◽  
Inorganic Matter ◽  
Fluid Bed

Abstract A modified approach to equilibrium modelling of coal gasification is presented, based on global thermodynamic analysis of both homogeneous and heterogeneous reactions occurring during a gasification process conducted in a circulating fluid bed reactor. The model is based on large-scale experiments (ca. 200 kg/h) with air used as a gasification agent and introduces empirical modifications governing the quasi-equilibrium state of two reactions: water-gas shift and Boudouard reaction. The model predicts the formation of the eight key gaseous species: CO, CO2, H2O, H2, H2S, N2, COS and CH4, volatile hydrocarbons represented by propane and benzene, tar represented by naphthalene, and char containing the five elements C, H, O, N, S and inorganic matter.

Operational characteristics of the pilot-scale coal gasification with filtration and hot fuel gas desulfurization

2016 ◽  
Vol 33 (9) ◽  
pp. 2610-2621 ◽  
Author(s):  
Jieun Lee ◽  
Suk-Hwan Kang ◽  
Hyo-Sik Kim ◽  
Dong-Hwan Jeon ◽  
Seung-Jong Lee ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Pilot Scale ◽  
Fuel Gas ◽  
Operational Characteristics ◽  
Hot Fuel Gas Desulfurization

scholarly journals Pengujian Kinerja Dan Modifikasi Reaktor Downdraft Gasifikasi Biomassa 100 kW

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Muhammad Ridwan ◽  
Indradjaja Indradjaja ◽  
Noviyanti Nugraha ◽  
Irfan Taufik
Keyword(s):  
Combustion Chamber ◽  
Combustion Process ◽  
Reactor Design ◽  
Cow Dung ◽  
Test Results ◽  
Solid Materials ◽  
Fuel Gas ◽  
Design Capacity ◽  
Gasification Process ◽  
Air Supply

ABSTRAKGasifikasi adalah suatu proses konversi senyawa yang mengandung karbon untuk mengubah material baik cair maupun padat menjadi bahan bakar gas mampu bakar melalui proses pembakaran dengan suplai udara terbatas. Reaktor tempat terjadinya proses gasifikasi disebut gasifier. Gas hasil dari proses gasifikasi disebut syngas. Pada penelitian sebelumnya telah dirancang reaktor gasifikasi dengan menggunakan kotoran sapi sebagai bahan bakar proses gasifikasi. Tipe reaktor yang digunakan adalah tipe downdraft. Tujuan dari penelitian ini adalah menguji performa mesin, menganalisa hasil pengujian dan memodifikasi rancangan reaktor gasifikasi downdraft kapasitas 100 kW. Dari pengujian pertama, diperoleh hasil pengujian yaitu temperatur di dalam ruang pembakaran kurang dari 500°C serta masih terdapat kebocoran pada komponen reaktor. Maka di perlukan modifikasi agar temperature yang ditargetkan yaitu diatas 500°C tercapai dan memperbaiki kekurangan lainnya. Modifikasi yang dilakukan meliputi bagian atas yaitu hopper, pemasangan instalasi pipa 2 in, serta pembuatan kembali saringan ash grate. Setelah melakukan modifikasi, dilakukan pengujian kembali, Hasil pengujian setelah dimodiifikasi diperoleh temperatur antara 550 oC – 600oC.Kata kunci : reaktor, downdraft, gasifikasi, kotoran sapi, pengujjianABSTRACTGasification is a process of converting carbonaceous compounds to convert both liquid and solid materials into fuel gas capable of burning through a combustion process with limited air supply. The reactor where the gasification process occurs is called a gasifier. The resultant gas from the gasification process is called syngas. Previous studies have designed gasification reactors using cow dung as a fuel for gasification processes. The type of reactor used is the downdraft type. The purpose of this study is to test the performance of the engine, analyze the test results and modify the down kaft gasification reactor design capacity of 100 kW. From the first test, obtained the test results that the temperature in the combustion chamber is less than 500°C and there is still leakage in the reactor component. So in need of modifications to the targeted temperature that is above 500°C achieved and fix other deficiencies. Modifications made include the top of the hopper, installation of 2-in pipe installation, as well as remaking ash grate filter. After modification, re-testing, the test results after modified temperature obtained between 550 oC - 600oC.Keywords: reactor, downdraft, gasification, cow dung, test.

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