Removal of hydrogen sulfide from a steam-hydrogasifier product gas by zinc oxide sorbent: Effect of non-steam gas components

Kim, Kiseok; Park, Nokuk

doi:10.1016/j.jiec.2010.04.003

Cited by 13 publications

(4 citation statements)

References 13 publications

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“…The average adsorption capacity on an adsorbent measuring 21 mesh is 2.13 times greater than that of a 6 mesh adsorbent. This is because smaller adsorbents have a higher active surface area [13]. Higher active surface area causes more H2S to be adsorbed by the adsorbent so that the adsorbent has a higher adsorption capacity.…”

Section: Figure 6 Comparison Of Adsorption Capacity In Each Variationmentioning

confidence: 99%

Hydrogen Sulfide Separation from Biogas Using Laterite Soil Adsorbent

Adisasmito

Rasrendra

Alfadhli

et al. 2020

MSF

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Biogas production contributes as an alternative renewable energy but its emissions contain sulphuric components which needs to be separated because it can cause damage to the environment. The method used in separation is adsorption with laterite soil because the price is cheap, easy to obtain, and can occur at room temperature. The purpose of this study is to determine the conditions of the adsorbent in the adsorption column which can provide a high adsorption capacity. The separation process is carried out by flowing biogas with a flow rate of 1.5 liters/minute to the adsorption column containing laterite soil. Reducing the particle size of the adsorbent from 6 mesh to 21 mesh will increase the adsorption capacity to 2.13 times, ie from 7.3 to 14.2 mg H2S/g adsorbent. The addition of bed height from 7 cm to 12 cm will increase the adsorption capacity from 6.7 to 7.9 mg H2S/g adsorbent at 6 mesh particle size. The addition of bed height from 7 cm to 12 cm will increase the adsorption capacity from 13.5 to 15.0 mg H2S/g adsorbent at 21 mesh particle size. The laterite soil adsorbent with a particle size of 21 mesh has the highest adsorption capacity of 15.0 mg H2S/g adsorbent.

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Section: Figure 6 Comparison Of Adsorption Capacity In Each Variationmentioning

confidence: 99%

Hydrogen Sulfide Separation from Biogas Using Laterite Soil Adsorbent

Adisasmito

Rasrendra

Alfadhli

et al. 2020

MSF

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“…Energies 2021, 14, 8019 2 of 14 oxides, solid mixtures of metal oxides, mixtures of an inert oxide [1][2][3][4][5][6][7][8][9][10][11], zeolites [12][13][14][15], activated carbon [16][17][18], and clays [19,20] are used to carry out the desulfurization process. Among those materials, metal oxides have been deeply studied: Chung et al [1] studied the H 2 S removal by using cobalt-containing sorbent from 300 to 500 • C and obtaining a complete sulfidation after less than 90 min.…”

Section: Introductionmentioning

confidence: 99%

“…Similar work has been performed by Wang et al [8] by using mesoporous silica with zinc oxide (ZnO) nanoparticles, obtaining comparable results. Kim et al [9] analyzed a commercially available zinc oxide sorbent with space velocity ranging from 8000 to 24,000 h −1 and in a range temperature from 25 to 450 • C. With an inlet H 2 S concentration of 2000 ppm, the sorbent has been able to adsorb for 360 min before reaching an outlet concentration of about 3 ppm with 30% of steam into the gas stream sorbent capacity decreases with increasing steam content and increasing space velocity. Furthermore, another process was developed by Rosso et al [10], which consisted of evaluating ZnO sorbents synthesized by the citrate method.…”

Section: Introductionmentioning

confidence: 99%

Deactivation Model Study of High Temperature H2S Wet-Desulfurization by Using ZnO

et al. 2021

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High-temperature desulfurization techniques are fundamental for the development of reliable and efficient conversion systems of low-cost fuels and biomass that answer to the nowadays environmental and energy security issues. This is particularly true for biomass gasification coupled to SOFC systems where the sulfur content has to be minimized before being fed to the SOFC. Thus, commercially available zinc oxide has been studied and characterized as a desulfurizing agent in a fixed-bed reactor at high temperatures from 400 °C to 600 °C. The sorbent material was characterized by XRD, BET, SEM, and EDS analyses before and after adsorption. The sorbent’s sorption capacity has been evaluated at different temperatures, as well as the breakthrough curves. Moreover, the kinetic parameters as the initial sorption rate constant k0, the deactivation rate constant kd, and the activation energy have been calculated using the linearized deactivation model. The best performances have been obtained at 550 °C, obtaining a sorption capacity of 5.4 g per 100 g of sorbent and a breakthrough time of 2.7 h. These results can be used to extend ZnO desulfurization techniques to a higher temperature than the ones used today (i.e., 550 °C with respect to 400 °C).

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“…Many metal oxides, including ZnO, CuO, Fe 2 O 3 and MnO x have been widely used because of their thermodynamic superiority with H 2 S under high temperature (Slimane and Abbasian, 2000;Alonso and Palacios, 2004;Kim and Park, 2010;Cheah et al, 2011). The most attention was mainly aimed at the development of effective metal oxides for H 2 S removal.…”

Section: Introductionmentioning

confidence: 99%

Removal of Hydrogen Sulfide by Iron-Rich Soil: Application of the Deactivation Kinetic Model for Fitting Breakthrough Curve

Ko¹,

Hsueh

Township³

2012

Aerosol Air Qual. Res.

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In this study a deactivation kinetic model was used to predict the breakthrough curve in a noncatalytic gas-solid reaction. The iron-rich soil was tested to react with H 2 S under a reducing atmosphere at high temperature. The results indicated that the deactivation kinetic model can be well fitted to the breakthrough curve in the experimental range. The breakthrough curves were accurately predicted by the model, and provide useful information for the time to reload the solid materials in the reaction. The activation energy of the reaction of iron-rich soil and H 2 S was experimentally calculated to be about 34 kJ/mol and 131 kJ/mol, respectively for the deactivation kinetic model I (m = 0, n = 1) and model II (m = 1, n = 1). Both of the deactivation kinetic models can fit the experimental results. The order of H 2 S in the deactivation model probably ranged from zero to one.

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Removal of hydrogen sulfide from a steam-hydrogasifier product gas by zinc oxide sorbent: Effect of non-steam gas components

Cited by 13 publications

References 13 publications

Hydrogen Sulfide Separation from Biogas Using Laterite Soil Adsorbent

Hydrogen Sulfide Separation from Biogas Using Laterite Soil Adsorbent

Deactivation Model Study of High Temperature H2S Wet-Desulfurization by Using ZnO

Removal of Hydrogen Sulfide by Iron-Rich Soil: Application of the Deactivation Kinetic Model for Fitting Breakthrough Curve

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