Fluidized bed gasification of coal

Chatterjee, Pradip K.; Datta, A. B.; Kundu, Krishnendu

doi:10.1002/cjce.5450730206

Cited by 32 publications

(12 citation statements)

References 6 publications

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“…Inside the riser, the spray meets with the hot catalyst coming from the regenerator where the coke loading was burnt off. The hot catalyst in contact with the feed droplets causes them to vaporize and to react at the catalyst's Fischer-Tropsch synthesis [66] Phthalic anhydride [67] Methacrylonitrile [3] Maleic anhydride [59] Oxychlorination of ethylene [68] Chlorination of methane [69] Methanol to gasoline [70,71] Phthalonitrile [67] Aniline [72] Melamine from urea [73] Polymerization of ethylene [74] Polymerization of propene [75] Fluid coking [76] Flexi-coking [76] Thermal cracking of naphtha [3] Combustion of coal and biomass [19,20,31] Municipal waste incineration [77] Sewage sludge incineration [78] Coal gasification [79] Calcination of aluminium hydroxide [88] Roasting of sulfide ores [89] Reduction of iron oxide [80,81] Biogas production [82,83] Solid-state fermentation [84] surface. The feedstock is thus cracked into lighter hydrocarbons while coke is deposited and thus deactivates the catalyst.…”

Section: Fluid Catalytic Cracking Reactorsmentioning

confidence: 99%

Fluidized‐Bed Reactors – Status and Some Development Perspectives

Werther

Hartge

Heinrich

2014

Chemie Ingenieur Technik

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This review of industrial applications of fluidized-bed reactors is focused on the fluid catalytic cracking (FCC) process and the fluidized-bed combustion. Both processes have a tremendous economic importance. In the FCC process, the main challenges are the increase of runtime, the adaption of the product spectrum to regional requirements of the market, and the adaption to heavier feedstocks. In fluidized-bed combustion the main trends are towards larger units sizes, higher efficiency, and further reduced emissions while keeping the boiler as flexible as possible with regard to the mixture of fuels.

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Section: Fluid Catalytic Cracking Reactorsmentioning

confidence: 99%

Fluidized‐Bed Reactors – Status and Some Development Perspectives

Werther

Hartge

Heinrich

2014

Chemie Ingenieur Technik

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“…Bayarsaikhan et al studied steam gasification of a Victorian brown coal in an atmospheric bubbling fluidized bed reactor with continuous feeding of the coal. In the study of Chatterjee gasification of a high-ash India coal in a laboratory-scale, atmospheric fluidized bed gasifier using steam and air as fluidizing media was studied. The variation of product gas composition, bed temperature, calorific value, and carbon conversion with oxygen and steam feed was discussed, and the experimental data were compared with the predicted.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Natural Coke Steam Gasification in a Bench-Scale Fluidized Bed: Influences of Temperature and Oxygen Flow Rate

Xiang

Zhao

Pang³

2009

Energy Fuels

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Natural coke was selected as a steam gasification feedstock in a bench-scale fluidized bed (i.d. 50 mm, H 1600 mm). The impacts of the gasification temperature and the oxygen flow rate on product gas composition, product gas yield, and gas heating value were investigated with a steam flow rate of 1050 g/h and a natural coke flow rate of 200 g/h. Experimental results show that gasification temperature has a significant influence on gasification properties. As the temperature goes up, the contents of H 2 and CO 2 in the product gas decline, whereas the content of CO increases. As the temperature was from 850 to 1000 °C, the volume fractions of H 2 , CO, and CO 2 in the product gas changed from 63.0%, 25.0%, and 9.6% to 59.8%, 20.2%, and 18.5%, respectively. The product gas yield increased by 4.3 times, the carbon conversion rate increased from 10.25% to 47.76%, and the gas heating value increased from 8.87 to 9.33 MJ/m 3 . Oxygen in the oxidant reagent steam affects the gasification properties. The product gas yield and the carbon conversion increased by 1.76 times and 1.94 times, respectively, when the oxygen flow rate was from 0 to 0.2 L/min. But as it further increased to 1.0 L/min, the product gas yield increased only by 1.16 times and the carbon conversion increased by 1.34 times. The effective composition in the product gas continued to decrease from 76.0% to 54.3%, and the heating value was lowered from 9.01 to 6.35 MJ/m 3 as the oxygen flow rate was raised from 0 to 1 L/min. The CO 2 composition increased persistently from 23.1% to 37.3%.

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“…These diverse active species with the high energy radiation capability of the A.C. plasma can help to enhance the chemical reactions substantially and to make some reactions possible. As for gasification, it is commonly applied to convert coal [18], biomass [19], and waste materials [14,[20][21][22] to syngas and useful chemicals in industries.…”

Section: Introductionmentioning

confidence: 99%

Recovery and Reduction of Spent Nickel Oxide Catalyst via Plasma Sintering Technique

Wong

Lin

Chang

et al. 2006

Plasma Chem Plasma Process

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A thermal plasma process for the recovery and reduction of nickel oxide in the spent nickel-based catalyst (NiO/SiO 2 ) was developed. The spent catalyst was sintered at >1,500°C under plasma condition and the nickel oxide therein was reduced to nickel, which was proven by XRD and EDX. By application of SEM and GC technique, the organic tar on the surface of the spent catalyst was found to decomposed and converted to syngas (CO, CO 2 , and H 2 ), which might be the reducing agents in the process. A gasification mechanism for the generation of syngas and the reduction of nickel oxide under plasma conditions was proposed.

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Fluidized bed gasification of coal

Cited by 32 publications

References 6 publications

Fluidized‐Bed Reactors – Status and Some Development Perspectives

Fluidized‐Bed Reactors – Status and Some Development Perspectives

Experimental Investigation of Natural Coke Steam Gasification in a Bench-Scale Fluidized Bed: Influences of Temperature and Oxygen Flow Rate

Recovery and Reduction of Spent Nickel Oxide Catalyst via Plasma Sintering Technique

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