Surface characterization studies of walnut-shell biochar catalysts for simultaneously removing of organic sulfur from yellow phosphorus tail gas

Song, Xin; Li, Kai; Ning, Ping; Wang, Chi; Sun, Xin; Tang, Lihong; Ruan, Haotian; Han, Seunghee

doi:10.1016/j.apsusc.2017.06.328

Cited by 57 publications

(12 citation statements)

References 41 publications

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“…3, the Cu-Fe/TSAC surface generates CO 2 (2363 cm À1 ), C]O groups (1604 cm À1 ), C-S groups (2080 cm À1 ) and S-O groups (1140 cm À1 and 1307 cm À1 ) as the reaction proceeds. 1,26,27 Furthermore, CO 2 was produced as the reaction time progressed, which can prove that the reaction is indeed the hydrolysis of COS and CS 2 . The formation of S-O groups can prove that the H 2 S was oxidized.…”

Section: àmentioning

confidence: 70%

“…7, more S-O groups (related to C]O groups) appeared when the reaction was performed below 5% O 2 . This indicated that O 2 was conducive to the removal of H 2 S due to the oxidation of H 2 S. 27 Meanwhile, fewer C]O groups appeared when the O 2 content was 5%, which indicated that O 2 mainly promoted the oxidation of H 2 S but not the conversion of C]O groups.…”

Section: Effect Of O 2 Content On the Simultaneous Removal Of H 2 S mentioning

confidence: 97%

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Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H₂S, COS and CS₂ at low temperature

et al. 2018

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Section: àmentioning

confidence: 70%

Section: Effect Of O 2 Content On the Simultaneous Removal Of H 2 S mentioning

confidence: 97%

Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H₂S, COS and CS₂ at low temperature

et al. 2018

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“…Song et al investigated the effect of thermal carbonization and chemical activation on walnut shell in catalytic hydrolysis of CS 2 and COS from tail gas to sulphur. The samples with the highest SSA also had the highest sulfur retention capacity SSA>1000 m 2 ⋅ g −1 .…”

Section: Applicationsmentioning

confidence: 78%

Experimental methods in chemical engineering: specific surface area and pore size distribution measurements—BET, BJH, and DFT

2019

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Gas physisorption is an experimental technique based on equilibrium Van der Waals interactions between gas molecules and solid particles, that quantifies the specific surface area (SSA), pore size distribution (PSD), and pore volume of solids and powders. The performance of catalysts, absorbents, chromatography column materials, and polymer resins depends on these morphological properties. Here we introduce the basic principles and procedures of physical adsorption, especially nitrogen physisorption, as a guide to students and researchers unfamiliar with the field. The Brunauer‐Emmett‐Teller theory (BET) is a common approach to estimate SSA that extends the Langmuir monolayer molecular adsorption model to multilayer layers. It relies on an equilibrium adsorption isotherm, measured at the normal boiling point of the adsorbate, eg, 77 K or 87 K for N2 and Ar, respectively. Web of Science indexed 45 400 articles in 2016 and 2017 that mentioned N2 adsorption porosimetry—BET and BJH (Barrett‐Joyner‐Halenda) keywords. The VOSViewer bibliometric tool grouped these articles into four research clusters: adsorption, activated carbon in aqueous solutions for removal of heavy metal ions; synthesis of nanoparticles and composites; catalysts performance in oxidation and reduction processes; and photocatalytic degradation with TiO2. According to the literature, the accuracy of the density function theory (DFT) method is higher than with the BJH theory and it is more reliable.

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“…LSB represented the lake sediment biochar. 2 and Ni (NO 3 ) 2 ) and Na 2 CO 3 solution (the Na 2 CO 3 content was dependent on the completion of the reaction between the metal and Na 2 CO 3 solution) were combined to produce the colloid solution. Then, LSB was added into the colloid solution with a desired proportion (the mass content of metal oxides ranged from 3 to 15%).…”

Section: Materials Preparationmentioning

confidence: 99%

“…At present, the removal methods of CS 2 include catalytic hydrolysis [2][3][4] and adsorption. 5,6 In these methods, catalytic hydrolysis characterizes low operation cost, [7][8][9] high desulfurization efficiency, 10,11 and low secondary pollution.…”

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confidence: 99%

Influence of surface characteristics on carbon disulfide catalytic hydrolysis over modified lake sediment biochar and research on deactivated mechanism

Song

Sun

et al. 2019

Surface & Interface Analysis

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A series of lake sediment biochar (LSB) catalysts modified by metal oxides and basic functional groups were utilized for removal of carbon disulfide (CS2) in yellow phosphorus tail gas. The influences of preparation and modification conditions for surface characteristics of Fe‐KOH/LSB on removal of CS2 were investigated. Surface area and pore structure analyses indicated that preparation processes were aimed to increase the micropore structure of LSB. Diffuse reflection using transform of Fourier infrared radiation results showed that Fe had high hydrolysis activity for CS2 and low oxidation activity for H2S. Thermogravimetric/differential thermal analysis results indicated that low calcination temperature was not conducive to the generation of Fe2O3 and high calcination temperature led to the oxidation of LSB. CO2 temperature programmed desorption results stated that high alkalinity site strength could improve the catalytic hydrolysis performance. High KOH content could enhance alkalinity site strength but led to the block of pore. These modification factors mainly controlled the catalytic hydrolysis ability of Fe‐KOH/LSB. X‐ray photoelectron spectroscopy results claimed that the deactivation of Fe‐KOH/LSB was attributed to the generation of S and sulfate, and the consumption of active component. In the deactivation process, S and sulfate generated and covered the activity sites, and Fe2O3 was converted into FeSO4 or Fe2(SO4)3, which led to the deactivation.

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Surface characterization studies of walnut-shell biochar catalysts for simultaneously removing of organic sulfur from yellow phosphorus tail gas

Cited by 57 publications

References 41 publications

Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H₂S, COS and CS₂ at low temperature

Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H₂S, COS and CS₂ at low temperature

Experimental methods in chemical engineering: specific surface area and pore size distribution measurements—BET, BJH, and DFT

Influence of surface characteristics on carbon disulfide catalytic hydrolysis over modified lake sediment biochar and research on deactivated mechanism

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Surface characterization studies of walnut-shell biochar catalysts for simultaneously removing of organic sulfur from yellow phosphorus tail gas

Cited by 57 publications

References 41 publications

Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H2S, COS and CS2 at low temperature

Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H2S, COS and CS2 at low temperature

Experimental methods in chemical engineering: specific surface area and pore size distribution measurements—BET, BJH, and DFT

Influence of surface characteristics on carbon disulfide catalytic hydrolysis over modified lake sediment biochar and research on deactivated mechanism

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Product

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Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H₂S, COS and CS₂ at low temperature

Research into the reaction process and the effect of reaction conditions on the simultaneous removal of H₂S, COS and CS₂ at low temperature