Kinetic analysis on thermo‐gravimetric profiles of pulverised coal pyrolysis and gasification under different oxy‐fuel environments

Irfan, Muhammad; Chakrabarti, Mohammed Harun; Kusakabe, Katsuki

doi:10.1002/cjce.21912

Cited by 10 publications

(6 citation statements)

References 33 publications

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“…Anthropogenic greenhouse gases from fossil fuel combustion have caused serious global warming and climate change problems . Various available technologies such as oxy‐fuel combustion, membranes, chemical‐looping combustion, and calcium looping technology have been proposed to mitigate CO 2 emissions.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous CO₂/SO₂ adsorption performance of carbide slag in adsorption/desorption cycles

Wu¹,

Li²,

Zhao³

et al. 2015

Can J Chem Eng

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Simultaneous CO2/SO2 adsorption performance of CaO derived from carbide slag (an industrial waste product from a chlor‐alkali plant) in multiple adsorption/desorption cycles was investigated in a dual fixed‐bed reactor. The effects of adsorption duration, SO2 concentration, adsorption temperature, desorption conditions, and particle size on carbonation conversion, cumulative sulphation conversion, and total Ca utilization of the carbide slag over multiple cycles were discussed. SO2 presence appreciably impedes the cyclic CO2 adsorption capacity of the carbide slag. A longer adsorption duration causes a sharper drop in the carbonation conversion due to the adverse effect of SO2. The presence of SO2 intensifies the effect of adsorption temperature on the carbonation conversion of the carbide slag. The optimum adsorption temperature for cyclic simultaneous CO2/SO2 adsorption by the carbide slag is 700 °C. The high desorption temperature and CO2 concentration (950 °C, 0.9999 L/L CO2) are not beneficial to cyclic CO2/SO2 adsorption. Both the carbonation conversion and cumulative sulphation conversion of the carbide slag decrease with increasing sorbent particle size in the cycles. The compact CaSO4 product layer covers the surface of CaO derived from the carbide slag during the multiple cycles, which results in a sharp drop in the surface area and pore volume with the cycle number. Compared with limestone, the carbide slag exhibits higher SO2 adsorption capacity and similar CO2 adsorption capacity during the cyclic simultaneous CO2/SO2 adsorption.

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Section: Introductionmentioning

confidence: 99%

Simultaneous CO₂/SO₂ adsorption performance of carbide slag in adsorption/desorption cycles

Wu¹,

Li²,

Zhao³

et al. 2015

Can J Chem Eng

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show abstract

“…In addition, there was no gain of weight observed indicating no oxidation process occurred. DTG curve (blue line) gives the idea about the mass loss variation from the sample while heating during the synthesis process [55]. The peaks of mass loss at 100 -150 o C is related to water loss, which is approximately 33.92 % with respect to overall loss of the sample.…”

Section: Resultsmentioning

confidence: 99%

Temperature effect on the synthesis of iron–cobalt nano-particles using catalytic chemical vapor deposition of CO2 in thermo-gravimetric analyzer: Analytical and thermodynamic studies

Irfan

Arami-Niya

2019

Nano-Structures & Nano-Objects

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Iron, cobalt and Fe-Co catalysts were prepared by conventional precipitation (coprecipitation for Fe-Co) method for the synthesis of nano-particles, using CO2 as the carbon precursor by catalytic chemical vapor deposition. Synthesis was done in a thermo gravimetric analyzer at different temperatures ranging from 450 o C to 1000 o C particularly for Fe-Co nano particles. Products were then evaluated using the FESEM, TEM, XRD and EDS analyses.Nano-particles of pebble-like shapes with some of conjoined shapes were observed at different temperatures for Fe, Co and Fe-Co. It was also observed that increase in temperature not only enhanced the size of the nanoparticles but it also led to a greater sphericity and crystallinity of the nanoparticles. For Fe-Co alloy, the dimensions of nanoparticles were found using FESEM to be 51±1 nm, 54±1 nm, 72±1 nm and 165±1 nm at 500, 600, 700, and 800°C, respectively.TEM also shows similar results to that of FESEM. XRD results show that at lower temperature (500 o C), products are amorphous in nature but at higher temperature (800 o C), the peaks became much longer and sharper indicating the crystalline nature of Fe-Co nanoparticles. CO disproportionation reaction was discussed and equations for equilibrium constant and mole fraction ( and 2 ) were developed. It was observed that CO decomposition is thermodynamically limited from 520 to 800 o C which led to carbon deposition on the catalyst as observed by the carbon presence in EDS, XRD and TEM images i.e. the encapsulation of thin layer of carbon on the Fe-Co particles.

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“…By increasing the air temperature in the furnace, the sample combustion time values decrease, while mass loss rate and carbon oxidation reaction rate increase. According to the Arrhenius equation [7], the fuel mass loss rate during heterogeneous reactions is described by the following equation:…”

Section: Combustion Kineticsmentioning

confidence: 99%

CHALLENGES  IN ADAPTATION OF ANNULAR SHAFT LIME KILN TO SOLID BIOMASS FUELS: A REVIEW

Morosavljević¹,

Kozak²,

Kosor³

et al. 2022

Emerging Trends in Industrial Engineering

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This study shows a review of engineering and design challenges in the transition of annular shaft lime kiln to solid biomass fuels from fluid fossil fuels. Since carbon permits and Paris Agreement were introduced by European Union, lime production companies were forced to transition to renewable and sustainable production methods to minimize carbon footprint and total emissions of greenhouse gasses. Because of the direct-fired system, annular shaft kilns are limited with renewable fuel options, mainly because residue or emissions from combustion could lower the quality of the product or result in the formation of byproduct. Biomass is one of, if not the only, possible renewable and sustainable fuel source which could provide good product quality in a direct-fired kiln.

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Kinetic analysis on thermo‐gravimetric profiles of pulverised coal pyrolysis and gasification under different oxy‐fuel environments

Cited by 10 publications

References 33 publications

Simultaneous CO₂/SO₂ adsorption performance of carbide slag in adsorption/desorption cycles

Simultaneous CO₂/SO₂ adsorption performance of carbide slag in adsorption/desorption cycles

Temperature effect on the synthesis of iron–cobalt nano-particles using catalytic chemical vapor deposition of CO2 in thermo-gravimetric analyzer: Analytical and thermodynamic studies

CHALLENGES  IN ADAPTATION OF ANNULAR SHAFT LIME KILN TO SOLID BIOMASS FUELS: A REVIEW

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Kinetic analysis on thermo‐gravimetric profiles of pulverised coal pyrolysis and gasification under different oxy‐fuel environments

Cited by 10 publications

References 33 publications

Simultaneous CO2/SO2 adsorption performance of carbide slag in adsorption/desorption cycles

Simultaneous CO2/SO2 adsorption performance of carbide slag in adsorption/desorption cycles

Temperature effect on the synthesis of iron–cobalt nano-particles using catalytic chemical vapor deposition of CO2 in thermo-gravimetric analyzer: Analytical and thermodynamic studies

CHALLENGES&nbsp; IN ADAPTATION OF ANNULAR SHAFT LIME KILN TO SOLID BIOMASS FUELS: A REVIEW

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Simultaneous CO₂/SO₂ adsorption performance of carbide slag in adsorption/desorption cycles

Simultaneous CO₂/SO₂ adsorption performance of carbide slag in adsorption/desorption cycles

CHALLENGES IN ADAPTATION OF ANNULAR SHAFT LIME KILN TO SOLID BIOMASS FUELS: A REVIEW