Coal gasificationbased FischerTropsch (FT) synthesis processes, often termed "coaltoliquids" (CTL) plants, are complex integrated energy systems which typically exploit the waste heat from gas turbines and/or a number of process units in a Heat Recovery Steam Cycle (HRSC).Besides converting waste heat into electricity, the HRSC can also supply heat to endothermic processes in the CTL ...
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A framework is proposed for integration of unit modeling, process synthesis, analysis, optimization, and process design of coal gasificationbased energy and chemical processes. The conceptual models of these processes are built by the modeling and synthesis blocks in the framework, which are the bases of analysis and optimization. A number of analysis techniques are employed in the framework ...
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Nexant completed the first two tasks (Tasks 1 and 2) of the ''Gasification Plant Cost and Performance Optimization Study'' for the DOE's National Energy Technology Laboratory (NETL) in 2003. These tasks evaluated the use of the EGAS {trademark} gasification technology (now owned by ConocoPhillips) for the production of power either alone or ...
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This process decouples the two steps, among them, coal pyrolysis converts the hydrogen in coal to H 2 to the maximum extent without being consumed, and char gasification causes the coke react with the water vapor in the gasification agent (C + H 2 O ↔ H 2 + CO) to generate H 2 and CO. Through cooperative matching of the two stages, hydrogen ...
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Coal gasification slag is generated in the process of coal gasification owing to the existence of minerals in the coal, particularly the incomplete reaction of the organic carbon elements in the coal. ... and flotation optimization methods. Furthermore, it puts forward four directions for enhancing the flotation process of CGFS: the principle ...
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The mathematical model used to study the entrained flow coal gasification process is based on the commercial CFD software Ansys Fluent [70] which incorporates the finitevolume method. ... Coal gasification results. The optimization of global devolatilization models was performed through the iterative procedure. Hence, the simulation results ...
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Feeding variability appears extensively in phenol and ammonia recovery process of coal chemical plant, which has caused severe problems in effluent quality. This study is aim to take the feeding variability into consideration for process optimization and analysis of the phenol and ammonia recovery process, have been not studied in previous efforts.
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Coal gasification process is simulated in the reactor shown in Fig. 5. It is a onestage atmospheric oxygenblown entrained flow reactor with a nonswirling flow at Brigham Young University. ... As a result, further detailed research is carried out that regards the impact of the optimization procedure directly in coal pyrolysis (Section ). 5 ...
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Gasification fine slag (GFS) is the waste produced in the coal gasification process, its production and storage volume are increasing with the largescale promotion of coal gasification technology. Currently, the GFS black water is processed by the horizontal belt filter and the moisture content of the obtained filter cake exceeds 50%, which ...
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Design process Sarongga coal, as raw material, was quite good with low ash content of 5% asreceived basis, although total moisture is relatively high, about 40%. In general, the coaltomethanol process consists of 3 main processes, namely coal gasification, syngas cleaning, and methanol synthesis, as shown in Figure 3.
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Underground coal gasification (UCG) is a clean coal mining technology without significant environmental impacts. This technology can also be used in deep, hardtoreach seams or deposits affected by tectonic disturbances, where conventional mining is impossible. Several techniques and methods have been investigated worldwide to support the process control of UCG. Global research focuses on the ...
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Owing to China's unique energy structure, more than 97% of its ammonia is produced through coal gasification (Xiang and Zhou, 2018). However, the air separation system, which consumes a large amount of energy, provides pure oxygen and needs to separate CO 2 and H 2. This results in a high energy consumption in the gasification process.
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When designing the coal gasification process, use the RGibbs model [16] or other models to simplify the coal gasifier in one dimension, ... Structural optimization of coal gasification furnace. The height of the gasifier studied in this paper is m. The prototype gasifier has only one set of four opposed nozzles, which leads to the uneven ...
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Advanced char conversion models are capable of predicting char consumption by oxidation and gasification. The following section presents two approaches used to integrate such advanced char conversion kinetics into CFD, namely SNOR and SNOI [ 108, 128 ]. SNOR stands for "single nth order reaction".
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Coal gasification technology has gained increasing popularity in recent years, but the optimization of operating conditions remains inefficient. The operation optimization of the Shell coal gasification process (SCGP) is investigated in this paper using an operation optimization model integrating data analytics and mechanism analysis. The objective function contains two important indicators.
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(3) Multiobjective optimization of the coal gasification process using the genetic algorithm to obtain the optimal solution. 2 Model and mathematical method K Gasification model Firstly, the coal gasification model is established. The gasification model is shown in, in which the corresponding model selected by each module in ...
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Texaco coal gasification process is a typical wet feeding system, and Texaco entrained flow gasifiers are widely used, especially in Integrated Gasification Combined Cycle (IGCC) [25,26]. ... Heat Exchanger Networks (HEN) synthesis and optimization is an important field in process integration and different objective functionshave been used to ...
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The process flowsheet of the coal gasification process in a downdraft fixedbed gasifier using air as an oxidant is shown in Figure 1. The ... In order to provide the performance data of the integrated Biomass to Liq. system and future process optimization, a comprehensive model of the downdraft biomass gasification process based on Aspen Plus ...
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with emphasis on coal gasification, cogasification of coal with an alternative feedstock, and NG technologies using the LCOH (2018 /kg) as the figure of ... netzero H2 through technology RD (, process intensification, advanced CO2 capture) • Analysis Activities: • Characterization of MSW, Waste Plastic, and Biomass Properties
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Gasification agents with different oxygen concentrations directly affect the temperature of the gasification area, while the UCG process is a selfheat balance process [20]. The heat generated by combustion is conducive to establishing the ideal temperature field of the underground gasifier and leads to a reduction reaction and decomposition ...
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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