Kinetic Analysis of Co-Combustion of Oil Shale Semi-Coke With Bituminous Coal

Sun, B-Z; Wang, Q; Shen, P-Y; Qin, Hong; Sh, LI

doi:10.3176/oil.2012.1.06

Cited by 9 publications

(9 citation statements)

References 11 publications

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“…As seen in Figure 5b, the highest adsorption capacities were at the lowest temperature for all samples and they decreased as the temperature increased. It is well established that lower temperatures are more conducive to adsorption [13,30,[32][33][34]. After this initial fast adsorption period, the maximum amount of SO 2 adsorbed was achieved after about 15 min for all samples (at which point, the mass remained constant for all samples for the next~40 min).…”

Section: Ability Of Semi-coke Sorbents To Adsorb Somentioning

confidence: 85%

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Experimental and Computational Demonstration of a Low-Temperature Waste to By-Product Conversion of U.S. Oil Shale Semi-Coke to a Flue Gas Sorbent

et al. 2018

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The volatility of crude oil prices incentivizes the use of domestic alternative fossil fuel sources such as oil shale. For ex situ oil shale retorting to be economically and environmentally viable, we must convert the copious amounts of semi-coke waste to an environmentally benign, useable by-product. Using acid and acid + base treatments, we increased the surface area of the semi-coke samples from 15 m2/g (pyrolyzed semi-coke) to upwards of 150 m2/g for hydrochloric acid washed semi-coke. This enhancement in porosity and surface area is accomplished without high temperature treatment, which lowers the overall energy required for such a conversion. XRD analysis confirms that chemical treatments removed the majority of dolomite while retaining other carbonate minerals and maintaining carbon contents of approximately 10%, which is greater than many fly ashes that are commonly used as sorbent materials. SO2 gas adsorption isotherm analysis determined that a double HCl treatment of semi-coke produces sorbents for flue gas treatment with higher SO2 capacities than commonly used fly ash adsorbents. Computational fluid dynamics modeling indicates that the sorbent material could be used in a fixed bed reactor to efficiently remove SO2 from the gas stream.

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Section: Ability Of Semi-coke Sorbents To Adsorb Somentioning

confidence: 85%

“…We probe this proposed explanation using TGA and XRD to describe the materials' composition. The results of the thermogravimetric analysis under pyrolysis conditions are presented in Figure 2 to provide a comparison of thermal stability [29,30]. At temperatures above 200 • C, organic matter is lost.…”

Section: Impact Of Activation On Semi-cokementioning

confidence: 99%

Experimental and Computational Demonstration of a Low-Temperature Waste to By-Product Conversion of U.S. Oil Shale Semi-Coke to a Flue Gas Sorbent

et al. 2018

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“…Wang et al [7,8] have researched the co-combustion of oil shale semi-coke and biomass by establishing a reaction kinetics model. Sun et al [9] investigated the cocombustion kinetic mechanisms of oil shale semi-coke and bituminous coals. The results showed that the process performance could be significantly improved by mixing semi-coke with high-calorific fuels.…”

Section: Introductionmentioning

confidence: 99%

Gaseous Emission and Thermal Analysis During Co-Combustion of Oil Shale Semi-Coke and Sawdust Using Tg-Ftir

QING¹,

Yang²,

HONGPENG³

et al. 2015

Oil Shale

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“…Wang et al analyzed the kinetics of Huadian oil shale and the co-combustion performance of its semi-coke and cornstalks by the Distributed Activation Energy Model (DAEM) [7,8]. Sun et al investigated the kinetics of co-combustion of oil shale semi-coke and bituminous coal by the Flynn-Wall-Ozawa (FWO) method and the inference method of Popescu mechanism function and established the most optimum mechanism for this function model [9]. Now, researches on co-combustion of oil shale retorting residue and biomass are relatively few.…”

Section: Introductionmentioning

confidence: 99%

Multi-Component Simulation and Kinetics Model for Co-Combustion of Huadian Oil Shale Retorting Residue and Cornstalks

HONGPENG¹,

XIAOJIAN²,

XUDONG³

et al. 2015

Oil Shale

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A series of experiments on co-combustion of the retorting residue of Huadian oil shale and cornstalks at different blending proportions were performed on a Pyris-1 thermogravimetric analyzer (TGA) to investigate the mechanism of the reactions involved. Moreover, the abrupt curvature changes of thermogravimetric (TG) curves and the multi-peaks and -shoulders of differential thermal gravity (DTG) curves for the blends were analyzed based on a simulation model of multi-component combustion. Results showed that the processes of combustion represented a multistage procedure of a clearly segmented nature. The processes can be divided into three stages of different temperature ranges: the first stage (135-380 °C), the second stage (380-560 °C) and the third stage (560-700 °C). With increasing blending ratio of cornstalks, the free energy of activation of combustion in the first and second stages is much lower than that in the third stage. Meanwhile, the continuous reaction processes of the samples combustion were analyzed by the Kissinger-Akahira-Sunose (KAS) kinetics model. Results showed that the activation enthalpy, activation entropy and free energy of activation of the samples combustion in its different stages varied. Moreover, with the addition of cornstalks, the portion of the ordered structure of activated molecules increased and the combustion characteristics of the retorting residue improved.

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Kinetic Analysis of Co-Combustion of Oil Shale Semi-Coke With Bituminous Coal

Cited by 9 publications

References 11 publications

Experimental and Computational Demonstration of a Low-Temperature Waste to By-Product Conversion of U.S. Oil Shale Semi-Coke to a Flue Gas Sorbent

Experimental and Computational Demonstration of a Low-Temperature Waste to By-Product Conversion of U.S. Oil Shale Semi-Coke to a Flue Gas Sorbent

Gaseous Emission and Thermal Analysis During Co-Combustion of Oil Shale Semi-Coke and Sawdust Using Tg-Ftir

Multi-Component Simulation and Kinetics Model for Co-Combustion of Huadian Oil Shale Retorting Residue and Cornstalks

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