Supercritical fluids in fuel cell research and development

Bozbağ, Selmi Erim; Erkey, Can

doi:10.1016/j.supflu.2011.09.006

Cited by 48 publications

(32 citation statements)

References 169 publications

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“…A clear example of this is found in wastewater reclamation [101]. Moreover, a recent work has revealed a higher catalytic activity for electrocatalysts synthesized in supercritical medium in comparison to commercial catalysts [102].…”

Section: Overview On Supercritical Fluids and Their Use To Produce Phmentioning

confidence: 97%

“…On the other hand, supercritical CO 2 (scCO 2 ) is particularly interesting, not only because it is a nontoxic, nonflammable compound, with high compressibility and abundance (low cost), but also with milder supercritical conditions (T c ¼ 304.4 K; P c ¼ 73.8 bar) than SCW [102]. In addition, the ease with which scCO 2 is removed from the final reaction mixture contrasts with the costly drying process to remove conventional solvents.…”

Section: Overview On Supercritical Fluids and Their Use To Produce Phmentioning

confidence: 99%

“…According to the above section, the use of SCF technology implies significant savings in conventional organic solvents, being substituted by fluids as scCO 2 , a nondestructive and clean solvent, very suitable for the production and processing of sensible materials and complex micro-and nanostructures [92,102].…”

Section: Particle Generation In Supercritical Fluidsmentioning

confidence: 99%

See 2 more Smart Citations

Greenhouse Effect Mitigation Through Photocatalytic Technology

Rincón

Camarillo

Martínez

et al. 2014

Environment, Energy and Climate Change I

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Climate change is one of the most critical issues facing the world. One of the pillars of the fight against this phenomenon is the mitigation of greenhouse gas (GHG) emissions, CO 2 in particular. Although many achievements have already been made in CO 2 capture and storage technologies, promising methods to convert waste streams concentrated in this gas into valuable products are currently under way. This chapter intends to describe one of them, the photocatalytic reduction of CO 2 to fuel products, that is, the reaction to produce fuel between the CO 2 molecules and a reducing agent (usually water), in the presence of a semiconductor material that provides electrons (e À ) and holes (h + ) when it is illuminated by light of appropriate energy. Moreover, if solar energy were employed as light source, this type of energy difficult to store could be transformed into liquid or gaseous fuels, useful in conventional power production systems. In this chapter, firstly, a wide review about photocatalysis fundamentals, photocatalysts, synthesis of particles in supercritical fluids, characterization techniques, photocatalytic reactors, etc., is carried out. Subsequently, previous results from the authors' research on this subject are shown. More specifically, the characteristics of photocatalysts synthesized in a supercritical medium to convert CO 2 into fuels are presented and discussed.

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Section: Overview On Supercritical Fluids and Their Use To Produce Phmentioning

confidence: 97%

Section: Overview On Supercritical Fluids and Their Use To Produce Phmentioning

confidence: 99%

Section: Particle Generation In Supercritical Fluidsmentioning

confidence: 99%

See 1 more Smart Citation

Greenhouse Effect Mitigation Through Photocatalytic Technology

Rincón

Camarillo

Martínez

et al. 2014

Environment, Energy and Climate Change I

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“…Compared to the relative molecular weights of Pt, Ir and Co metallic phase in the initially used organometallic precursors, less amount of Ir and Co was yielded compared to Pt composition in the PtIrCo/CA-SCF. Though the solubility of metallic precursors in supercritical CO 2 (scCO 2 ) increases at T sc > 60 C and P sc > 10 MPa [24], many other factors such as oxidation state of the metalcation, relative size of the metal-ion and the ligand, the number of ligands attached to the metallic-ion, CO 2 -philic tendency and the polar nature of the precursor in scCO 2 [24,25] can also influence the relative compositions of the metallic phase yield in PtIrCo/CA-SCF. However, the advantage of this approach is in routine adjustment of the relative elemental metal ratio in PtIrCo/CA-SCF by varying the initial weights of the corresponding precursors.…”

Section: Analysis Of Chemical Composition and Dispersion Of Ptirco/camentioning

confidence: 99%

Methanol Oxidation and Oxygen Reduction Activity of PtIrCo-Alloy Nanocatalysts Supercritically Deposited within 3D Carbon Aerogel Matrix

Kolla

Smirnova

2015

Electrochimica Acta

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“…There some types of membrane [10][11][12][13] including mixed matrix membranes [14]. The latter may include an addition of nanoparticle in their membrane formulation [15][16][17] which can improve ionic conductivity and transport selectivity of the membrane prepared. However, as cost is also concern, there are also another trend in developing new fuel cell membrane form in expensive material [18].…”

Section: Introductionmentioning

confidence: 99%

Roles of Preparation Method on Characteristics of Supramolecular-Structured Polymer Electrolyte Membrane Fuel Cell Based on Sulfonated Polystyrene

Hendrana¹,

Semboor

Natanael

et al. 2018

jsmi

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Polystyrene (S-PS) have been developed in Research Centre for Physics LIPI. In forming the supramolecular structure sulfonate groups in S-PS are aligned with polyethylene-graft-maleic anhydride (PE-g-MA) which carried out by dissolution of the constituent and mixing of both. The alignment of sulfonate groups in s-PS is carried out in a liquid form. Therefore, in this study, the effect of concentration of the solution of both polymers constituent to the alignment of the sulfonate groups and the characteristics of the membrane produced is studied. Scanning Electron Microscope (SEM) images show that all membranes prepared are rigid. Differential Scanning Calorimetry (DSC) studied show very significance differences in its crystal sizes. XRD diffraction data also support the previous results. Membrane prepared from very dilute solution having better ion exchange capacity (IEC), water uptake and ionic conductivity. Therefore, the experiments results showing that very low concentration of polymer constituent, clearly, produced better interaction of both, which agree with hyphotesis in this work where supramolecular structure can be formed by mixing two very dilute polymer solutions.Keywords: PEMFC, Sulfonated polystyrene, PE-g-MA, Supramolecular structure ABSTRAK PERAN METODE PREPARASI PADA KARAKTETISTIK DARI POLIMER ELEKTROLIT MEMBRAN FUEL CELL DENGAN STRUKTUR SUPRAMOLEKULAR BERBASIS POLISTIREN TERSULFONASI.Polimer Elektrolit Membran Fuel Cell dengan struktur supramolekular berbasis polistirena tersulfonasi (S-PS) telah dikembangkan di Pusat Penelitian Fisika LIPI. Pada pembentukan struktur supramolekular gugus sulfonat pada polistirena tersulfonasi diarahkan dengan polietilen-graft-anhidrida maleat (PE-g-MA) yang dilakukan dengan melarutkan kedua bahan penyusun tersebut. Pengarahan gugus sulfonat dari S-PS dilakukan dalam kondisi cair. Karenanya, dalam studi ini, efek dari konsentrasi dari kedua larutan polimer penyusun pada pengarahan gugus karbonat dimaksud dan karakteristik-karakteristik dari membran yang dihasilkan akan dipelajari. Image SEM menunjukkan bahwa semua membran yang dibuat adalah rigid. Studi DSC menunjukkan terdapat perbedaan yang sangat berarti pada ukuran kristal. Data XRD juga mendukung hasil-hasil yang diperoleh. Membran yang dibuat dengan larutan yang sangat encer memiliki kapasitas petukaran ion (EIC), tangkapan-air dan konduktifitas ionik yang lebih baik. Oleh karenanya, data eksperimen menunjukkan

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Supercritical fluids in fuel cell research and development

Cited by 48 publications

References 169 publications

Greenhouse Effect Mitigation Through Photocatalytic Technology

Greenhouse Effect Mitigation Through Photocatalytic Technology

Methanol Oxidation and Oxygen Reduction Activity of PtIrCo-Alloy Nanocatalysts Supercritically Deposited within 3D Carbon Aerogel Matrix

Roles of Preparation Method on Characteristics of Supramolecular-Structured Polymer Electrolyte Membrane Fuel Cell Based on Sulfonated Polystyrene

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