Effect of process conditions on reaction-type adsorption of o-xylene by MCM-41 supported sulfuric acid: Model simulations of breakthrough curves

Ma, Mengze; Gao, Kaiyin; Zhao, Dandan; Ma, Xiaolong; Ma, Zhen

doi:10.1016/j.jece.2021.106937

Cited by 11 publications

(11 citation statements)

References 41 publications

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“…Especially at 700 °C, the o -xylene breakthrough from the HIO bed remained unseen until 54 h, and the process curve was also different as compared to the curves acquired at lower temperatures ( Figure 2 b), thus, implying that HIO might have possessed super capacity (more than 691 mg g[Fe] −1 ) and unique reaction mechanism for removing o -xylene, which need to be studied further. Comparing Q B of HIO for removing o -xylene with other materials already reported in the literature [ 9 , 10 , 11 , 12 ], the value obtained here was higher.…”

Section: Resultssupporting

confidence: 40%

“…Therefore, the development of new technologies to prevent the VOC contamination is currently of significant interest [ 5 , 6 , 7 , 8 ]. Among these, the processes that can enable the achievement of VOC resource utilization are a key to move towards sustainability; thus, these have received an increasing attention in recent years [ 9 , 10 , 11 , 12 , 13 , 14 ]. Considering that the mainstream technologies for VOCs elimination such as catalytic oxidation and thermal combustion are based on VOCs oxidation reactions, it is suspected that VOCs have a potential as reducing agents in the iron-making process from iron oxide ores.…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor

Zhao

Qian

et al. 2022

Molecules

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To establish a novel approach for VOCs resource utilization, coupled o-xylene oxidation and hematite reduction was investigated in this study in a high-temperature gas-solid reactor in the temperature range 300–700 °C. As the o-xylene-containing inert gas (N2) stream traveled through the hematite particle bed, its reaction behavior was determined in programmed heating and constant temperature modes. Consequently, the effect of bed temperature, flow rate and o-xylene inlet concentration on both o-xylene removal performance and degree of hematite reduction was studied. The raw hematite and solid products were analyzed by TGA, XRF, XRD and SEM-EDS. The results showed that a temperature above 300 °C was required to completely eliminate o-xylene by hematite, and both o-xylene removal capacity and degree of hematite reduction at 5% breakthrough points enhanced on increasing the temperature and decreasing the flow rate. The increment in temperature from 300 °C to 700 °C led to a gradual reduction of Fe2O3 to Fe3O4, FeO and metallic iron. Thus, this study provides a novel, economic and promising technology for treating the VOC pollutants.

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Section: Resultssupporting

confidence: 40%

Section: Introductionmentioning

confidence: 99%

Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor

Zhao

Qian

et al. 2022

Molecules

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“…The dynamic adsorption tests of a series of the SSA(E)-x and SSA(W)-x materials were performed in a custom-made testing platform, which was described in our previous studies [27]. Before the beginning of each experiment, the testing samples (100 mg, ≤0.15 mm) were blended with an equal part of inert quartz sands (0.180-0.425 mm) and then filled in the adsorption column (6 mm i.d.…”

Section: Dynamic Adsorption Testsmentioning

confidence: 99%

“…To better understand the dynamic adsorption behaviors, the dose-response model (Equation ( 3)) was used to fit the above experimental data and calculate both theoretical adsorption performance parameters (t B,th /min and Q B,th /mg g −1 ) [27].…”

Section: Dynamic Adsorption Testsmentioning

confidence: 99%

Influence of Impregnation Medium on the Adsorptive Performance of Silica Sulfuric Acid for the Removal of Gaseous o-Xylene: Comparison on Ethyl Acetate and Water

Zhao

Ma²,

Qian³

et al. 2022

Catalysts

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Silica supported sulfuric acid (SSA) has been demonstrated to be capable of effectively removing phenyl VOCs through the reaction-type adsorption mechanism. The effects of the solvent (water, ethyl acetate) used to impregnate silica gel with H2SO4 solution in order to prepare SSA adsorbents have been studied. As-prepared two series SSA(E)-x and SSA(W)-x materials (x = 1, 2, 3, 4) were characterized by TG, SEM/EDS and N2 adsorption/desorption techniques, and their breakthrough adsorption performances were evaluated from experimental and theoretical aspects. The results showed that the H2SO4 loading amounts were 2.8, 4.0, 4.8 and 5.6 mmol g−1 respectively for both SSA(E)-x and SSA(W)-x when x equaled 1, 2, 3, 4. Among them, SSA(E)-4 was found to have a higher proportion of the C-state H2SO4 than SSA(W)-4. Both SSA(E)-x and SSA(W)-x exhibited significant removal capacity of gaseous o-xylene. The reactive temperature regions were determined to be 120–170 °C for SSA(E)-4 and 120–160 °C for SSA(W)-4 with a common optimum point of 160 °C. Both SSA(E)-x and SSA(W)-x adsorbents exhibited excellent recyclability and reuse performance. Further, the series SSA(E)-x materials outperformed the series SSA(W)-x on all adsorption performance metrics, suggesting that ethyl acetate is a preferred solvent for preparing the SSA materials in phenyl VOCs removal application.

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“…Amongst the nanomaterials, macroporous or mesoporous nanomaterials especially MCM-41 have been widely used as an ideal support for immobilization of various catalysts and other applications. 29,30 MCM-41 has also been used in other elds such as drug delivery, 31,32 extraction, 33 adsorption, 34,35 sensors, 36,37 supports for catalysts, [38][39][40] and energy. 41 This is because MCM-41 has unique properties, e.g.…”

Section: Introductionmentioning

confidence: 99%

A Schiff base complex of lanthanum on modified MCM-41 as a reusable nanocatalyst in the homoselective synthesis of 5-substituted 1H-tetrazoles

et al. 2022

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Effect of process conditions on reaction-type adsorption of o-xylene by MCM-41 supported sulfuric acid: Model simulations of breakthrough curves

Cited by 11 publications

References 41 publications

Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor

Utilization of Hematite Particles for Economical Removal of o-xylene in a High-Temperature Gas-Solid Reactor

Influence of Impregnation Medium on the Adsorptive Performance of Silica Sulfuric Acid for the Removal of Gaseous o-Xylene: Comparison on Ethyl Acetate and Water

A Schiff base complex of lanthanum on modified MCM-41 as a reusable nanocatalyst in the homoselective synthesis of 5-substituted 1H-tetrazoles

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