Time-resolved operando DRIFTS-MS study of the moisture tolerance of small-pore SAPO-34 molecular sieves during CH4/CO2 separation

Romero, Marta; Navarro, Juan Carlos; Bobadilla, Luis F.; Domí­nguez, Manuel; Ivanova, Svetlana; Romero-Sarria, Francisca; Centeno, Miguel Ángel; Odriozola, José Antonio

doi:10.1016/j.micromeso.2020.110071

Cited by 3 publications

(8 citation statements)

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“…The kinetic diameter of CO 2 is 0.33 nm [131] . SAPO‐34 has a high surface area with a 0.38 cm 3 /g micropore volume [131,134,135] . Therefore, CO 2 can diffuse in the channels of SAPO‐34 and adsorb in pores.…”

Section: Sapo‐34 For Co2 Capture and Separationmentioning

confidence: 99%

“…A molecule with a smaller kinetic diameter than that of CHA (0.38 nm) interacts with the hydroxyl groups (Figure 4b). Therefore, only H 2 O (0.265 nm) and CO 2 (0.33 nm) molecules can enter SAPO‐34, whereas CH 4 (0.38 nm) can only interact with the hydroxyl groups on the external crystalline surface [135] …”

Section: Sapo‐34 For Co2 Capture and Separationmentioning

confidence: 99%

“…[131] SAPO-34 has a high surface area with a 0.38 cm 3 /g micropore volume. [131,134,135] Therefore, CO 2 can diffuse in the channels of SAPO-34 and adsorb in pores. Second, CO 2 with quadrupolar properties is readily adsorbed on polar surfaces.…”

Section: Sapo-34 For Co 2 Capture and Separationmentioning

confidence: 99%

“…Some researchers have studied the effects of water on CO 2 /CH 4 separation using SAPO-34. [145] Recently, Romero et al [135] evaluated the effect of moisture on the CO 2 separation from CH 4 using SAPO-34. Hydrothermally synthesized SAPO-34 with different compositions, crystal sizes, textures, and hydrophobic characteristics were associated with the presence of Si islands.…”

Section: R E V I E W T H E C H E M I C a L R E C O R Dmentioning

confidence: 99%

“…Therefore, only H 2 O (0.265 nm) and CO 2 (0.33 nm) molecules can enter SAPO-34, whereas CH 4 (0.38 nm) can only interact with the hydroxyl groups on the external crystalline surface. [135] Pourmahdi et al [146] revealed that SAPO-34 has higher CO 2 selectivity than CH 4 . CO 2 interacts more strongly with zeolite walls than CH 4 , owing to its high heat of adsorption.…”

Section: R E V I E W T H E C H E M I C a L R E C O R Dmentioning

confidence: 99%

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A Review on SAPO‐34 Zeolite Materials for CO₂ Capture and Conversion

Usman

Ghanem

Shah

et al. 2022

The Chemical Record

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Among several known zeolites, silicoaluminophosphate (SAPO)‐34 zeolite exhibits a distinct chemical structure, unique pore size distribution, and chemical, thermal, and ion exchange capabilities, which have recently attracted considerable research attention. Global carbon dioxide (CO2) emissions are a serious environmental issue. Current atmospheric CO2 level exceeds 414 parts per million (ppm), which greatly influences humans, fauna, flora, and the ecosystem as a whole. Zeolites play a vital role in CO2 removal, recycling, and utilization. This review summarizes the properties of the SAPO‐34 zeolite and its role in CO2 capture and separation from air and natural gas. In addition, due to their high thermal stability and catalytic nature, CO2 conversions into valuable products over single metal, bi‐metallic, and tri‐metallic catalysts and their oxides supported on SAPO‐34 were also summarized. Considering these accomplishments, substantial problems related to SAPO‐34 are discussed, and future recommendations are offered in detail to predict how SAPO‐34 could be employed for greenhouse gas mitigation.

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Section: Sapo‐34 For Co2 Capture and Separationmentioning

confidence: 99%

Section: Sapo‐34 For Co2 Capture and Separationmentioning

confidence: 99%