Coal gasification schematics

Fig. 1. Schematic of coal gasification combined cycle power generation.

Figure 1. A schematic of an integrated coal gasification system for fuel cell or combined-cycle-power-generation applications.

Schematic of coal gasification. (http //www.fossil.energy.gov/programs/powersystems/gasification/howgasificationworks.html http //en.wikipedia. org/wiki/Integrated gasification combined cycle).

In order to compare the economics as well as the overall C02 emissions from each schematic studied in this joint venture, a reference case was analyzed. The reference case included only the process steps associated with coal gasification, shift, and hydrogen purification, but none of the steps associated with C02 sequestration or coalbed methane recovery. Three other process schemes were examined in this study and compared to the reference case. Figure 1 depicts simplified process flow diagrams for the reference case and the other three schemes (note the overall heat integration for each scheme is not shown). The top portion of the figure shows the process steps that are the same for each scheme up to hydrogen purification, while the operations inside the dashed boxes represent the steps that differ between the four cases. 

Figure 2. Schematic flow diagram of Texaco coal gasification process for hydrogen manufacture...

Figure 7.3 A schematic diagram of an entraincd>flow coal gasification process to produce hydrogen from coal [Pellegrino el al., 1988]...

Fig. 1 Schematic diagram for solar-assisted coal gasification...

Coal gasification has a wide range of applications as shown schematically in Figure 4.1. Coal is shown here as a feedstock, but the technology is applicable to... 

At the heart of the GE coal gasification process is a top-fired slurry-fed slagging entrained-flow gasifier. Schematics of the typical Texaco gasification system are shown in Figures 4.10 and 4.11. 

Figure 4.10. Schematic of a typical GE coal gasification system with quench chamber.

Figure 5.34 (JSC schematic plant fed with syngas from coal gasification integrated with atmospheric PBRs presented in Ref [91 ]. fSource Reproduced from Ref [911, with permission from...

FIGURE 17.14 Schematic of the Great Plains lignite coal gasification complex. 

The principle of undergroxmd coal gasification (UCG) is shown schematically in Fig. 2. 

The first application of the fluidized-bed gasifier in the gasification process is the original Winkler process. In the Winkler process, steam and air (or 02) are used at atmospheric pressure. The schematic of a typical Winkler gasifier is shown in Figure 4.25. The coal (brown coal coke, subbituminous, or bituminous coals) is... 

The Koppers-Totzek process was first commercialized in 1952 and, by 1984, was used in 19 plants in 17 different countries [27]. The process uses powdered coal at atmospheric pressures in a parallel flow of 02 and H20 at temperatures of 1400-2000°C. The high process temperatures eliminate the formation of hydrocarbons and produce a gas containing 85—90% syngas (CO and H2). A process schematic is shown in Figure 2.26 [37]. Recent process developments include the Pressurized Entrained Flow Gasification (PRENFLO) with operating pressures being increased to 40 bars. 

General Synthesis Scheme. A schematic diagram of a plant producing synthetic liquid fuels and chemicals from coal via the Fischer-Tropsch synthesis is shown in Fig. 11-3. Gasification of coal with steam and oxygen is followed by a purification step to eliminate solids, sulfur compounds, and most of the carbon dioxide. Two stages of synthesis are employed to attain a high conversion of the synthesis gas. Recovery and treatment of primary... 

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