The removal of hydrogen sulfide with manganic sorbent in a high-temperature fluidized-bed reactor

Jang, Hyun Tae; Kim, Sang Bum; Doh, Dong Sup

doi:10.1007/bf02697195

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Accordingly, the tertiary and secondary amines are suitably used for the total acid gas CO 2 and H 2 S removal from the industrial gas streams [16]. Where, the temperature exhibited an acceleration effect on the physicochemical absorption of H 2 S. Increase in temperature, resulted in increasing of H 2 S removed from the gas stream [20]. This behavior was remarked in this study and also the maximum scavenging efficiency was obtained by MF3.…”

Section: Effect Of the Chemical Dosage And Temperature On The H 2 S Ssupporting

confidence: 53%

Synthesis and evaluation of some amine compounds having surface active properties as H2S scavenger

Kandile

Razek

Al-Sabagh

et al. 2014

Egyptian Journal of Petroleum

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In this work three H 2 S scavengers were prepared by reacting monoethanolamine with formaldehyde in different ratios (1:1, 2:1 and 2:3) to give MF1, MF2 and MF3, respectively. The chemical structures of the prepared scavengers were confirmed by FT-IR spectroscopy. The effect of reaction time (the time required for completing the reaction between the scavenger and the H 2 S gas) has been studied for the three prepared scavengers. The effects of concentration and temperature have been studied on the scavenging efficiency of H 2 S using three prepared products and two commercial products EPRI-710 and EPRI-730. The surface and thermodynamic parameters of the prepared scavengers were determined at 25°C including, surface tension (c), and effectiveness, maximum surface excess (C max ) and minimum surface area (A min ). Also, the standard free energy of micellization and adsorption was recorded. The results show that the efficiency of scavengers increased with increasing reaction time up to 50 min. Also, as concentration of scavengers and temperature increased, the removal efficiency of the scavengers increased. By comparing the efficiency of the prepared products with the commercial products EPRI-710 and EPRI 730, it was found that, MF3 exhibited a similar efficiency comparing with the commercial scavenger EPRI 730 (currently used in the field) at different concentrations and temperatures. ª 2014 Production and hosting by Elsevier B.V. on behalf of Egyptian Petroleum Research Institute.

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Section: Effect Of the Chemical Dosage And Temperature On The H 2 S Ssupporting

confidence: 53%

Synthesis and evaluation of some amine compounds having surface active properties as H2S scavenger

Kandile

Razek

Al-Sabagh

et al. 2014

Egyptian Journal of Petroleum

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“…Several high temperature desulfurization techniques are, therefore, desired for use in such applications [3]. Previously, the high temperature removal of hydrogen sulfide from simulated gas was carried out in batch type fluidized-bed reactor by using natural manganese ore consisting of several metal oxides (MnO x : 51.85%, FeO y : 3.86%, CaO: 0.11%) [4]. It was found that H 2 S removal efficiency increased with increasing temperature but decreased with increasing excess gas velocity.…”

Section: Introductionmentioning

confidence: 99%

High temperature desulfurization over nano-scale high surface area ceria for application in SOFC

Kempegowda

Laosiripojana

Assabumrungrat

2008

Korean J. Chem. Eng.

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In the present work, suitable absorbent material for high temperature desulfurization was investigated in order to apply internally in solid oxide fuel cells (SOFC). It was found that nano-scale high surface area CeO 2 has useful desulfurization activity and enables efficient removal of H 2 S from feed gas between 500 to 850 o C. In this range of temperature, compared to the conventional low surface area CeO 2 , 80-85% of H 2 S was removed by nano-scale high surface area CeO 2 , whereas only 30-32% of H 2 S was removed by conventional low surface area CeO 2 . According to the XRD studies, the product formed after desulfurization over nano-scale high surface area CeO 2 was Ce 2 O 2 S. EDS mapping also suggested the uniform distribution of sulfur on the surface of CeO 2 . Regeneration experiments were then conducted by temperature programmed oxidation (TPO) experiment. Ce 2 O 2 S can be recovered to CeO 2 after exposure in the oxidation condition at temperature above 600 o C. It should be noted that SO 2 is the product from this regeneration process. According to the SEM/EDS and XRD measurements, all Ce 2 O 2 S forming is converted to CeO 2 after oxidative regeneration. As the final step, a deactivation model considering the concentration and temperature dependencies on the desulfurization activity of CeO 2 was applied and the experimental results were fitted in this model for later application in the SOFC model.

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“…The beneficial effect of water on SO 2 adsorption is attributed to the formation of surface hydroxyl groups in metal oxides. Manganese dioxide in the composition of manganese ores and specially prepared adsorbents serves as an efficient adsorber of sulfur dioxide and hydrogen sulfide [13][14][15][16][17]. A comprehensive review of the catalytic and sorption properties of ferromanganese ores was made by M. Nitta [18], who demonstrated that ferromanganese ore is a promising material for purification of gases from toxic impurities, in particular sulfur dioxide, hydrogen sulfide, ammonia, and heavy metal ions (Hg, Pb, Cd and others).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Sorption Properties of Ore Materials for the Removal of Sulfur Dioxide from Exhaust Flue Gases of Power Plants

et al. 2015

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The prospects of using a natural material – ferromanganese nodules (FMN) from<br />the Gulf of Finland – as the SO2 adsorbent are discussed. The starting material was<br />studied as pellets and powder using X-ray fluorescence spectroscopy, XRD, BET,<br />and mechanical strength analysis; dependences of physicochemical parameters of<br />the material on heat treatment at 100-1000 ºC were found. FMN samples were tested in the process of SO2 sorption. The sorptive capacity of FMN samples for SO2 was found to increase with humidity of adsorbents; FMN samples with a humidity above 40% were shown to be promising for the removal of sulfur dioxide from gases.

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The removal of hydrogen sulfide with manganic sorbent in a high-temperature fluidized-bed reactor

Cited by 5 publications

References 11 publications

Synthesis and evaluation of some amine compounds having surface active properties as H2S scavenger

Synthesis and evaluation of some amine compounds having surface active properties as H2S scavenger

High temperature desulfurization over nano-scale high surface area ceria for application in SOFC

Investigation of the Sorption Properties of Ore Materials for the Removal of Sulfur Dioxide from Exhaust Flue Gases of Power Plants

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