Dynamic modeling of a pilot-scale fluidized-bed coal gasification reactor

Rhinehart, R. Russell; Felder, Richard M.; Ferrell, J.K.

doi:10.1021/ie00064a019

Cited by 21 publications

(11 citation statements)

References 14 publications

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“…The practical importance of this result is that a suitable reactor design can eliminate the need for a downstream shift reactor, whether the desired end product is methane (for which an H2/CO ratio of 3.0 is desired) or methanol (H2/CO = 2.0). As was shown in another study (Rhinehart et al, 1987), the reactor could in fact be operated and controlled to achieve either of these conditions, confirming the model predictions of Figures 12 and 13 plot the bed temperature vs. 02/C ratio with reactor pressure and bed height, respectively, as parameters. Moderate changes in either reactor pressure or fluidized bed height are seen to have only slight effects on the reactor temperature.…”

Section: Performancesupporting

confidence: 82%

“…Computational Algorithm. Transient reactor modeling studies performed by using the model are described in another paper (Rhinehart et al, 1987). The paragraphs that follow briefly summarize the model algorithm; more complete details are given by Rhinehart (1985).…”

Section: Modelingmentioning

confidence: 99%

“…A finite-difference approximation of the Newton-Raphson algorithm is used to determine the values of the model parameters that match predicted and measured steady-state values of the three given process variables. Details of the algorithm are given by Rhinehart et al (1987).…”

Section: Modelingmentioning

confidence: 99%

See 2 more Smart Citations

Coal gasification in a pilot-scale fluidized bed reactor. 3. Gasification of a Texas lignite

Rhinehart¹,

Felder²,

Ferrell³

1987

Ind. Eng. Chem. Res.

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Section: Performancesupporting

confidence: 82%

Section: Modelingmentioning

confidence: 99%

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Coal gasification in a pilot-scale fluidized bed reactor. 3. Gasification of a Texas lignite

Rhinehart¹,

Felder²,

Ferrell³

1987

Ind. Eng. Chem. Res.

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“…The equilibrium constant of the water gas shift reaction (K-shift) calculated from the wet gas analysis is also presented in Table 2 Operational data for the selected set points with different wood feedstocks. [26]. In addition, Table 2 also shows the equilibrium temperature which would give the Kvalue corresponding to the measured gas composition.…”

Section: Gasifier Performancementioning

confidence: 99%

Steam–oxygen gasification of forest residues and bark followed by hot gas filtration and catalytic reforming of tars: Results of an extended time test

Kurkela

Hiltunen

2016

Fuel Processing Technology

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Steam-oxygen gasification in a Circulating Fluidized-bed (CFB) reactor was developed for producing transportation fuels from different wood residues. This article presents the results of a two week test campaign, in which crushed forest residues and industrial bark mixture were used as the feedstocks. The aim of the work was to carry out extended time testing of the developed gasification and hot gas cleaning process and to determine the fate of different gas contaminants and trace components of wood. In the test runs, wood fuels were gasified in the CFB reactor at a 0.2-0.25 MPa pressure using a mixture of steam and oxygen as the gasification agent. A mixture of sand and dolomite was used as the bed material in order to maintain stable fluidization and to catalyse in-situ tar decomposition before hot filtration. Raw gas was filtered at ca. 550°C and the filtered gas was then led into a two-stage catalytic tar reformer. The gasifier performance and the concentrations of different gas contaminants were determined at four different operating variable set points during a total of 215 h of operation. The results for carbon conversion efficiency, raw gas composition and the fate of fuel nitrogen, chlorine and trace metals are presented in this paper. The concentrations of gas contaminants were determined after the ceramic filter unit and after the catalytic reformer. The conversion efficiencies for hydrocarbon gases, tars and ammonia in the reformer are also presented. The test run was carried out as a continuous operation without any interruptions or operational problems.

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“…In Fig. 5, the equilibrium coefficients calculated from the actual gas analyses (from Table 3 and Table 5) determined before and after the reformer are compared with the values calculated with the formula given in [36]. In this figure, the measured values are plotted against the average temperature of the secondary zone of the gasifier and the outlet temperature of the reformer.…”

Section: Gasifier Performancementioning

confidence: 99%

Pilot-scale development of pressurized fixed-bed gasification for synthesis gas production from biomass residues

Kurkela

Hiltunen

2021

Biomass Conv. Bioref.

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Advanced transportation biofuels have been the focus of intensive development since the early 2000s, and gasification in combination with synthesis technologies represents a flexible production pathway to deliver fuels for heavy-duty transport sectors that are difficult to electrify. This article is related to the pilot-scale development of a process concept aiming to smaller-scale production plants than are feasible with fluidized-bed gasifiers. Five test weeks with a total gasification time of 347 h were realized at a pilot plant that consisted of the pressurized staged fixed-bed gasifier, raw gas cooling to 500–600 °C, filtration with robust metal filters, and catalytic reforming of tars and methane. The gasifier combined an updraft primary stage and a catalytically enhanced secondary stage where most of the updraft tars were decomposed. The tar content of the product gas, 2–12 g/m3, was of the same order of magnitude as determined previously for fluidized-bed gasifiers. Consequently, similar filtration and reforming methods could be successfully applied. After the reformer, the contents of C2-hydrocarbon gases and high-molecular-weight tars were negligible.

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Dynamic modeling of a pilot-scale fluidized-bed coal gasification reactor

Cited by 21 publications

References 14 publications

Coal gasification in a pilot-scale fluidized bed reactor. 3. Gasification of a Texas lignite

Coal gasification in a pilot-scale fluidized bed reactor. 3. Gasification of a Texas lignite

Steam–oxygen gasification of forest residues and bark followed by hot gas filtration and catalytic reforming of tars: Results of an extended time test

Pilot-scale development of pressurized fixed-bed gasification for synthesis gas production from biomass residues

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