Numerical investigation on distribution characteristics of oxidation air in a lime slurry desulfurization system with rotary jet agitators

Xiang, Longhao; Sun, Xun; Wei, Xuesong; Wang, Guichao; Boczkaj, Grzegorz; Yoon, Jasang; Chen, Songying

doi:10.1016/j.cep.2021.108372

Cited by 6 publications

(5 citation statements)

References 37 publications

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“…Processes that have been modeled include RMI, 15,16 CVD, 17,18 CVI, [19][20][21][22] and Sol-Gel Infiltration. 23 Impregnation of alumina matrix in eight-harness satin Nextel 610 fabric has been studied numerically in Ref. [ 24 ].…”

Section: The Preparation Of Mosimentioning

confidence: 99%

“…29,30 The physics of resin flow into a mold under pressure is similar to the seepage problem and so similar approaches have been used also to model the flow of resin into a mold containing fiber mats. 23,[31][32][33][34][35][36][37][38] The models are used in these cases to determine the resin flow front and mold filling times corresponding to different infiltration conditions.…”

Section: The Preparation Of Mosimentioning

confidence: 99%

“…29,30 The physics of resin under pressure is similar to the seepage pr lar approaches have been used also to mod into a mold containing fiber mats. 23,[31][32][33][34][35][36][37][38] T in these cases to determine the resin flow ing times corresponding to different infilt Preceramic polycarbosilane polymers as precursors to make ceramic fibers 10,3 trix. [7][8][9]40,41 The chemical and volume ch pany ceramization of the polymer during documented in several studies.…”

Section: Introductionmentioning

confidence: 99%

“…Lime is an efficient desulfurizer and has been widely applied in metallurgy, chemical industry, and other fields. [21][22][23] In recent years, a novel concept of lime-assisted metal extraction (Mo, Fe, Cu etc.) from their sulfide ores has attracted more and more attention because CaO can high-efficiently capture the S element in sulfide ores.…”

Section: Introductionmentioning

confidence: 99%

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A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

2021

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The extraction of metal from sulfide mineral is usually accompanied by the emission of sulfur-containing gas (e.g., SO 2 ), which will cause serious pollution to the environment. In this work, a sulfur-emission free route for preparing ultrafine molybdenum disilicide (MoSi 2 ) powder by silicothermic reduction of MoS 2 with the desulfurization agent of lime was proposed. The internal MoS 2 -Si mixture is wrapped in an external desulfurization layer composed of lime. After the reaction is completed, the prepared MoSi 2 can be easily separated from the desulfurization layer by using a non-chemical method. In addition, when the reaction temperature is higher than 1000°C, almost all S in MoS 2 is transformed to sulfurcontaining gas SiS, which can be fully captured by lime to generate CaS, Si, and CaSiO 3 . For the raw material with a MoS 2 :Si molar ratio of 1:4, after reacting at 1000, 1100, and 1200°C for 2 h, the average grain sizes of the obtained MoSi 2 powder are approximately 100, 300, and 800 nm, respectively. Moreover, when the reaction time is prolonged from 2 to 6 h at 1000°C, the average grain size of the acquired MoSi 2 powder is about 200 nm, and the residual sulfur content is about 0.12%. This work provides a new insight to extract metals or metal compounds from sulfide ores without releasing sulfur-containing gas.

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Section: The Preparation Of Mosimentioning

confidence: 99%

Section: The Preparation Of Mosimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

2021

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“…Regarding the modeling of the absorber sump, the aim of numerical modeling is to optimize the air dispersion using different combinations of spargers and agitators (mixers) [13], which can be included in a dynamic model of an FGD plant [14]. Gomez et al [15] created a detailed numerical model of an FGD plant using the Euler-Euler approach, which includes both the scrubber section and the absorber sump.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Two-Phase Flow inside a Wet Flue Gas Absorber Sump

Vovk,

Ravnik

2023

Energies

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A numerical model of a flue gas scrubber sump is developed with the aim of enabling optimization of the design of the sump in order to reduce energy consumption. In this model, the multiphase flow of the continuous phase, i.e., water, and the dispersed phase, i.e., air bubbles, is considered. The air that is blown in front of the agitators, as well as the influence of the flow field of the agitators on the distribution of the dispersed phase and the recirculation pumps as outlet, is modeled. The bubble Sauter mean diameter is modeled using the population balance model. The model is used to analyze operating parameters such as the bubble retention time, the average air volume fraction, bubble Sauter mean diameter, the local distribution of the bubble size and the amount of air escaping from the pump outlets at two operating points. The purpose of the model is to simulate the two-phase flow in the sump of the flue gas scrubber using air dispersion technology with a combination of spargers and agitators, which, when optimized, reduces energy consumption by 33%. The results show that the homogeneity of air is lower in the bottom part of the absorber sump and that the amount of air escaping through recirculation pipes equals 1.2% of the total air blown into the absorber sump. The escaping air consists mainly of bubbles smaller than 6 mm. Additional operating point results show that halving the magnitude of the linear momentum source lowers the air retention, as well as the average homogeneity of the dispersed air.

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Desulfurization of raw naphtha cuts using hybrid systems based on acoustic cavitation and advanced oxidation processes (AOPs)

Cako

Soltani

Sun

et al. 2022

Chemical Engineering Journal

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Numerical investigation on distribution characteristics of oxidation air in a lime slurry desulfurization system with rotary jet agitators

Cited by 6 publications

References 37 publications

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

Numerical Modeling of Two-Phase Flow inside a Wet Flue Gas Absorber Sump

Desulfurization of raw naphtha cuts using hybrid systems based on acoustic cavitation and advanced oxidation processes (AOPs)

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Numerical investigation on distribution characteristics of oxidation air in a lime slurry desulfurization system with rotary jet agitators

Cited by 6 publications

References 37 publications

A novel sulfur‐emission free route for preparing ultrafine MoSi2 powder by silicothermic reduction of MoS2

A novel sulfur‐emission free route for preparing ultrafine MoSi2 powder by silicothermic reduction of MoS2

Numerical Modeling of Two-Phase Flow inside a Wet Flue Gas Absorber Sump

Desulfurization of raw naphtha cuts using hybrid systems based on acoustic cavitation and advanced oxidation processes (AOPs)

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A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂