Catalytic Performance of Limonite in the Decomposition of Ammonia in the Coexistence of Typical Fuel Gas Components Produced in an Air-Blown Coal Gasification Process

2007 ◽  
Vol 21 (6) ◽  
pp. 3063-3069 ◽  
Author(s):  
Naoto Tsubouchi ◽  
Hiroyuki Hashimoto ◽  
Yasuo Ohtsuka
Keyword(s):  
Coal Gasification ◽  
Catalytic Performance ◽  
Fuel Gas ◽  
Gasification Process

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.

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.

Catalytic activities of nickel, dolomite, and olivine for tar removal and H2-enriched gas production in biomass gasification process

2018 ◽  
Vol 29 (6) ◽  
pp. 839-867 ◽  
Author(s):  
Ahsanullah Soomro ◽  
Shiyi Chen ◽  
Shiwei Ma ◽  
Wenguo Xiang
Keyword(s):  
Biomass Gasification ◽  
Catalytic Performance ◽  
Gas Production ◽  
Fuel Gas ◽  
Catalytic Activities ◽  
Gasification Process ◽  
Gas Utilization ◽  
Gas Products ◽  
Tar Cracking ◽  
Gasification Products

Tar content in gasification products is a serious problem for fuel gas utilization in downstream applications. Catalytic steam reforming of tar to syngas is a promising way for the removal of tar from the gas products. Nickel-based catalysts, dolomite, and olivine have been widely investigated for tar cracking and reforming by various researchers. This paper presents a review of biomass gasification, tar composition, and its elimination process by using the above three catalysts. This paper summarizes the knowledge in the published literature associated with tar elimination during the biomass gasification including discussion on the effects of different support, promoter on the catalytic performance. The aim of this paper is to collect information on the performance of above catalysts to make them accessible to readers within one paper. Comparative studies on these catalysts carried out by some researchers have also been presented here which show that the nickel-based catalyst is much more active than dolomite and olivine, but they are more expensive and can be also deactivated. Compared to olivine, the dolomite shows better catalytic performance with much higher gas yield and H2. Calcination of these catalysts improves the catalytic activities but the amount of coke deposited on the surface of the dolomite is reported higher than that of the olivine, which may be resulted from the different Fe amount of the catalyst.

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 Changes in properties of tar obtained during underground coal gasification process

2021 ◽  
Author(s):  
Marian Wiatowski ◽  
Roksana Muzyka ◽  
Krzysztof Kapusta ◽  
Maciej Chrubasik
Keyword(s):  
Coal Gasification ◽  
Coal Tar ◽  
Liquid Product ◽  
Coke Oven ◽  
Underground Coal Gasification ◽  
Gasification Process ◽  
Dominant Component ◽  
Process Gas ◽  
High Volatility ◽  
Product Separator

AbstractIn this study, the composition of tars collected during a six-day underground coal gasification (UCG) test at the experimental mine ‘Barbara’ in Poland in 2013 was examined. During the test, tar samples were taken every day from the liquid product separator and analysed by the methods used for testing properties of typical coke oven (coal) tar. The obtained results were compared with each other and with the data for coal tar. As gasification progressed, a decreasing trend in the water content and an increasing trend in the ash content were observed. The tars tested were characterized by large changes in the residue after coking and content of parts insoluble in toluene and by smaller fluctuations in the content of parts insoluble in quinoline. All tested samples were characterized by very high distillation losses, while for samples starting from the third day of gasification, a clear decrease in losses was visible. A chromatographic analysis showed that there were no major differences in composition between the tested tars and that none of the tar had a dominant component such as naphthalene in coal tar. The content of polycyclic aromatic hydrocarbons (PAHs) in UCG tars is several times lower than that in coal tar. No light monoaromatic hydrocarbons (benzene, toluene, ethylbenzene and xylenes—BTEX) were found in the analysed tars, which results from the fact that these compounds, due to their high volatility, did not separate from the process gas in the liquid product separator.

Prediction of Key Parameters of Coal Gasification Process Based on Time Delay Mining Fuzzy Time Cognitive Maps

2021 ◽  
Author(s):  
Congbin Jiang ◽  
Dan Wang ◽  
Cuiping Gong ◽  
Gang Zhang ◽  
Wen Gu ◽  
...  
Keyword(s):  
Time Delay ◽  
Coal Gasification ◽  
Cognitive Maps ◽  
Gasification Process

Numerical simulation on the coal gasification process in dry feed entrained gasifier

2020 ◽  
Author(s):  
Lijun Wang ◽  
Xiaocheng Du ◽  
Jiajun Sun ◽  
Shuping Duan ◽  
Xin Xie
Keyword(s):  
Numerical Simulation ◽  
Coal Gasification ◽  
Gasification Process
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