Selective removal of SO2 over tertiary amine-containing materials

Tailor, Ritesh; Ahmadalinezhad, Asieh; Sayari, Abdelhamid

doi:10.1016/j.cej.2013.11.002

Cited by 67 publications

(60 citation statements)

References 39 publications

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“…This result further confirms that the secondary amine fibers have better SO 2 reversibility than the primary amine based fibers though SO 2 capacity of the secondary amine fibers is high. For the tertiary amine based sample, CA-S-DMAPS, the q d;SO 2 ($0.28 mmol/g) was nearly equal to the q pe;SO 2 ($0.29 mmol/g), revealing excellent SO 2 reversibility [11,21,25].…”

Section: Cyclic So 2 Adsorption Experiments In Fiber Adsorbentsmentioning

confidence: 93%

“…The presence of humidity in the gas mixture dramatically enhanced the SO 2 adsorption capacity, as was also observed for CO 2 . Other works by Zhi et al [27] and Tailor et al [25] have also demonstrated the positive effects of moisture on SO 2 adsorption in amine grafted adsorbents. Overall, the above studies involving limited exposure and cycling of amine silica solid adsorbents to nitrogen and sulfur acid gases collectively demonstrated that these adsorbents are liable to be poisoned by NO 2 and SO 2 , with primary and secondary amine-rich adsorbents being at least partially irreversibly poisoned, while NO did not exhibit detrimental impacts on the adsorption properties on the adsorbents.…”

Section: Introductionmentioning

confidence: 91%

“…To date, many studies reporting the stability of various types of amine based solid adsorbents toward common flue gas contaminants such as SO 2 , NO and NO 2 have been published [11][12][13][14]16,21,24,25]. In 1994, Diaf et al [11] reported the adsorption performance of CO 2 , SO 2 , NO and NO 2 on various amine functionalized polymeric adsorbents.…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Stability of amine-based hollow fiber CO2 adsorbents in the presence of NO and SO2

Fan

Rezaei

Labreche

et al. 2015

Fuel

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h i g h l i g h t s SO 2 -deactivated primary amine fibers reversibly adsorb additional SO 2 . Secondary amine fibers exhibit better SO 2 tolerance than primary amine fibers. Tertiary amine grafted fibers have good SO 2 reversibility under dry or humid conditions. NO does not affect the CO 2 capacity of the fibers over 120 adsorption-desorption cycles. a b s t r a c tComparative studies of the cyclic stability of primary, secondary, and tertiary amine-grafted silica/polymer composite fiber adsorbents upon exposure to simulated flue gas are reported. A simulated dry flue gas mixture with 200 ppm NO does not cause degradation of the amine grafted fiber adsorbents and all fibers retain their CO 2 capacity in the presence of NO. In contrast, upon exposure to dry flue gas in the presence of 200 ppm SO 2 at 35°C, the primary amine containing adsorbent, CA-S-APS, shows a CO 2 capacity reduction of 55% over 120 cyclic adsorption-desorption runs. As the initial SO 2 induced degradation occurs in this adsorbent, the amine sites first irreversibly adsorb SO 2 and then begin to gradually adsorb SO 2 reversibly, as evidenced from a quantitative comparison of the amount of adsorbed SO 2 to the amount of desorbed SO 2 . The secondary amine containing adsorbent, CA-S-MAPS, exhibits an improved stability and approximately 25% CO 2 capacity loss is observed during cycling in the presence of SO 2 . Therefore, the secondary amine based CA-S-MAPS adsorbent demonstrates some degree of tolerance to SO 2 in comparison to the CA-S-APS sample. Under humid conditions, SO 2 imposes significant detrimental impacts on the two adsorbents, as a result of increased SO 2 adsorption capacities in the presence of moisture. Although the CO 2 uptake is nearly zero in the tertiary amine adsorbent, CA-S-DMAPS, the SO 2 capacity of this adsorbent reaches 0.43 mmol/g under humid conditions and this material has the highest SO 2 /N ratio of the fiber adsorbents studied. More importantly, this CA-S-DMAPS sample demonstrates reversible SO 2 adsorption, as indicated from the SO 2 cyclic adsorption experiments. The tertiary amine based fiber adsorbents have good potential for flue gas desulfurization, with advantageous characteristics of high SO 2 /N ratio, excellent reversibility, low CO 2 adsorption and relatively low regeneration temperature.

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Section: Cyclic So 2 Adsorption Experiments In Fiber Adsorbentsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Stability of amine-based hollow fiber CO2 adsorbents in the presence of NO and SO2

Fan

Rezaei

Labreche

et al. 2015

Fuel

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“…Furthermore, in a recent study by Sayari and co-workers, 74 the mechanism of SO 2 adsorption on supported tertiary amines was investigated. The following reaction pathways were proposed for the interaction of SO 2 with tertiary amines under both dry (Eq.…”

Section: So X Adsorption Mechanismmentioning

confidence: 99%

SO_x/NO_x Removal from Flue Gas Streams by Solid Adsorbents: A Review of Current Challenges and Future Directions

et al. 2015

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One of the main challenges in the power and chemical industries is to remove generated toxic or environmentally harmful gases before atmospheric emission. To comply with stringent environmental and pollutant emissions control regulations, coal-fired power plants must be equipped with new technologies that are efficient and less energy intensive than status quo technologies for flue gas cleanup. While conventional sulfur oxide (SO x ) and nitrogen oxide (NO x ) removal technologies benefit from their large-scale implementation and maturity, they are quite energy intensive. Given this, development of lower cost, less energy intense technologies could offer an advantage. Significant energy and cost savings can be realized using advanced adsorbent materials. One of the major barriers to the development of such technologies remains development of materials that are efficient and productive in removing flue gas contaminates. In this review, adsorption-based removal of SO x /NO x impurities from flue gas is discussed while focusing on important attributes of the solid adsorbent materials as well as implementation of the materials in conventional and emerging acid gas removal technologies. The requirements of effective adsorbents are noted with respect to their performance, key limitations and suggested future research directions. The final section discusses some key areas for future research and provides a possible roadmap for development of more efficient and cost-effective technologies for removal of flue gas impurities than status quo approaches.

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“…Since the emission of SO 2 from the burning of fossil fuels is one of the major sources of air pollution, it is highly desirable to decrease, capture, and utilize SO 2 . The current methods for removal of SO 2 mainly include limestone scrubbing, ammonia scrubbing, and absorption with organic solvents, which are primarily based on physical and chemical interactions with absorbents . Among these methods, the ammonia scrubbing method could efficiently minimize secondary pollutants and exhibit a high efficiency in removal of SO 2 , but it suffers some inherent drawbacks, such as the loss of solvent through evaporation and degradation .…”

Section: Introductionmentioning

confidence: 99%

Rapid Preparation of Ultrafine BaSO₃ by SO₂ Storage Material

Zhang

Sha

Qiao

et al. 2017

Bulletin Korean Chem Soc

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In this work, a green and efficient process was developed for the preparation of ultrafine BaSO3 with layered nanostructure surface via the reaction of BaCl2 with a SO2 storage material (SO2SM) at room temperature. The absorption of SO2 with equimolar ethylenediamine (EDA) and ethylene glycol (EG) afforded SO2SM, which not only offered alkyl sulfite but also released EDA and EG that served as efficient surfactants to promote the formation of BaSO3 with spherical morphology and porous structure in the process of synthesis of ultrafine BaSO3. The factors affecting the morphology and size of BaSO3 particle were assessed by investigating the effects of SO2SM concentration, BaCl2 concentration, stirring time and speed. It was found that a higher SO2SM concentration led to a higher degree of supersaturation, and the particle size of BaSO3 could be reduced by increasing SO2SM concentration. Moreover, under the identified optimal reaction conditions, ultrafine BaSO3 was obtained with an average diameter of 450 nm. In addition, a plausible formation process of BaSO3 was proposed to explain the observed reaction results. Overall, the developed process in this work provides an efficient method for the capture, utilization, and conversion of SO2 into a valuable chemical.

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Selective removal of SO2 over tertiary amine-containing materials

Cited by 67 publications

References 39 publications

Stability of amine-based hollow fiber CO2 adsorbents in the presence of NO and SO2

Stability of amine-based hollow fiber CO2 adsorbents in the presence of NO and SO2

SO_x/NO_x Removal from Flue Gas Streams by Solid Adsorbents: A Review of Current Challenges and Future Directions

Rapid Preparation of Ultrafine BaSO₃ by SO₂ Storage Material

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Selective removal of SO2 over tertiary amine-containing materials

Cited by 67 publications

References 39 publications

Stability of amine-based hollow fiber CO2 adsorbents in the presence of NO and SO2

Stability of amine-based hollow fiber CO2 adsorbents in the presence of NO and SO2

SOx/NOx Removal from Flue Gas Streams by Solid Adsorbents: A Review of Current Challenges and Future Directions

Rapid Preparation of Ultrafine BaSO3 by SO2 Storage Material

Contact Info

Product

Resources

About

SO_x/NO_x Removal from Flue Gas Streams by Solid Adsorbents: A Review of Current Challenges and Future Directions

Rapid Preparation of Ultrafine BaSO₃ by SO₂ Storage Material