Untitled

Jose, Binoy; Ryu, Jae Hee; Lee, Byung Gwon; Lee, Hyunjoo; Kang, Yong Soo; Kim, Hoon Sik

doi:10.1039/b105656p

Cited by 62 publications

(38 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the polymer electrolyte membranes consisting of AgBF 4 dissolved in POZ, PVP or PEO containing oxygen atom show the slightly continuous decrease in separation performance. 50,51 This is possibly due to the reduction of silver ions to silver nanoparticles during the separation process, because polymers such as PEO, POZ or PVP used as a polymer solvent in the solid polymer electrolytes also plays a role as a reducing agent for the silver salts. 22,[50][51][52][53] It has been recently reported that plasticizers such as dialkyl and diaryl phthalates are highly effective to prolong the carrier activity of the free silver ion, thereby increasing the performance of the dry polymer electrolyte membranes, as shown in Figure 13.…”

Section: Membrane Performancementioning

confidence: 99%

“…50,51 This is possibly due to the reduction of silver ions to silver nanoparticles during the separation process, because polymers such as PEO, POZ or PVP used as a polymer solvent in the solid polymer electrolytes also plays a role as a reducing agent for the silver salts. 22,[50][51][52][53] It has been recently reported that plasticizers such as dialkyl and diaryl phthalates are highly effective to prolong the carrier activity of the free silver ion, thereby increasing the performance of the dry polymer electrolyte membranes, as shown in Figure 13. 50,51 Stability enhancement is attributed to the fact that the silver ions are more strongly held by the phthalate groups to form chelating bonds and consequently their reduction reaction to metal is mostly prevented.…”

Section: Membrane Performancementioning

confidence: 99%

“…Mixed gas selectivity and permeance of PVP/AgBF 4 membranes containing with and without phthalate as a function of time (a) selectivity and (b) permeance 50,51. …”

mentioning

confidence: 99%

See 2 more Smart Citations

Silver polymer electrolyte membranes for facilitated olefint transport: carrier properties, transport mechanism and separation performance

2004

Self Cite

View full text Add to dashboard Cite

Facilitated transport membranes for the separation of olefin/paraffin mixtures have long been of interest in separation membrane science because olefins, such as propylene and ethylene, which are important chemicals in petrochemical industries, are currently separated by energy-intensive cryogenic distillation processes. Recently, solid polymer electrolyte membranes containing silver ions have demonstrated remarkable performance in the separation of olefin/paraffin mixtures in the solid state and, thus, they can be considered as alternatives to cryogenic distillation. Here, we review recent progress, and critical issues affecting in the use of facilitated olefin transport membranes; in particular, we provide a general overview with reference to carrier properties, transport mechanisms, and separation performance.

show abstract

Section: Membrane Performancementioning

confidence: 99%

Section: Membrane Performancementioning

confidence: 99%

See 1 more Smart Citation

Silver polymer electrolyte membranes for facilitated olefint transport: carrier properties, transport mechanism and separation performance

2004

Self Cite

View full text Add to dashboard Cite

show abstract

“…The interaction of olefins with silver ions confined to a carbonyl-containing polymer electrolyte membrane has been demonstrated clearly by FTIR spectroscopy, [3,4] but the interaction of olefins with silver ions bound to sulfonate groups has never been investigated. For this reason, we conducted a FTIR spectroscopic investigation of the interaction of sulfonate-bound silver ions with propylene using 2 b.…”

Section: Resultsmentioning

confidence: 99%

Separation of Olefin/Paraffin Mixtures Using Zwitterionic Silver Complexes as Transport Carriers

Kim

Bae

Park

et al. 2007

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

Zwitterionic silver nitrate salts of 1-(1-methyl-3-imidazolio)propane-3-sulfonate, 1-(1-methyl-1-pyrrolidinio)propane-3-sulfonate, and 1-(4-methyl-4-morpholio)propane-3-sulfonate have been prepared and tested as carriers for facilitated olefin transport membranes in the separation of ethylene/ethane, propylene/propane, and C4 mixtures. The interactions of olefins with silver ions bound to sulfonate groups were investigated by FTIR spectroscopy as well as the correlation between the binding affinity of olefins and facilitated transport.

show abstract

“…The complex membranes of silver ion with the oxygen atoms of amide groups commonly showed a poor long-term stability. 19,20 In this paper, the coordinative interaction of silver ions with C=C of PHMV and their ionic interactions with counteranions are elaborated in detail. More specifically, the dissociation and π-complexation behavior in PHMV complexes with three silver salts, i.e., AgBF 4 , AgClO 4 and AgCF 3 SO 3 are investigated, and ionic constituents such as free ions, ion pairs and higher order ionic aggregates are additionally characterized.…”

Section: Introductionmentioning

confidence: 99%

FT-raman studies on ionic interactions in π-complexes of poly(hexamethylenevinylene) with silver salts

et al. 2006

Self Cite

View full text Add to dashboard Cite

Remarkably high and stable separation performance for olefin/paraffin mixtures was previously reported by facilitated olefin transport through π-complex membranes consisting of silver ions dissolved in poly(hexamethylenevinylene) (PHMV). In this study, the π-complex formation of AgBF 4 , AgClO 4 and AgCF 3 SO 3 with PHMV and their ionic interactions were investigated. FT-Raman spectroscopy showed that the C=C stretching bands of PHMV shifted to a lower frequency upon incorporation of silver salt, but the degree of peak shift depended on the counteranions of salt due to different complexation strengths. The symmetric stretching modes of anions indicated the presence of only free ions up to [C=C]:[Ag]=1:1, demonstrating the unusually high solubility of silver salt in PHMV. Above the solubility limit, the ion pairs and higher-order ionic aggregates started to form. The coordination number of silver ion for C=C of PHMV was in the order AgBF 4 AgClO 4 AgCF 3 SO 3 , but became similar at [C=C]:[Ag]=1:1. The different coordination number was interpreted in terms of the different transient crosslinks of silver cations in the complex, which may be related to both the interaction strength of the polymer/silver ion and the bulkiness of the counteranion.

show abstract

Untitled

Abstract: The presence of a phthalate in dry polymer membranes consisting of polyvinylpyrrolidone (PVP) and AgBF4, AgBF4-PVP, provides long-term stability and better performance for the separation of propylene/propane gas mixtures.

Cited by 62 publications

References 10 publications

Silver polymer electrolyte membranes for facilitated olefint transport: carrier properties, transport mechanism and separation performance

Silver polymer electrolyte membranes for facilitated olefint transport: carrier properties, transport mechanism and separation performance

Separation of Olefin/Paraffin Mixtures Using Zwitterionic Silver Complexes as Transport Carriers

FT-raman studies on ionic interactions in π-complexes of poly(hexamethylenevinylene) with silver salts

Contact Info

Product

Resources

About