Syngas cleaning with nano-structured micro-porous ion exchange polymers in biomass gasification using a novel downdraft gasifier

Akay, G.; Jordan, C. Andrea; Mohamed, Abdulaziz H.

doi:10.1016/s2095-4956(13)60056-x

Cited by 19 publications

(23 citation statements)

References 24 publications

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“…PolyHIPE Polymers can be chemically and biologically functionalized [16][17][18][19][20] in order to achieve mimicking of nature's processing strategy and applied to tissue engineering, bioprocess intensification, and agroprocess intensification. Furthermore, nonbiological functionalization processes were used for specific applications such as separation processes [21], fast response ion-exchange resins [22], and environmental and energy conversion processes [23].…”

Section: Polyhipe Polymers As Monolithic Microreactors and Asmentioning

confidence: 99%

Preparation of Nanostructured Microporous Metal Foams through Flow Induced Electroless Deposition

Akay

Calkan

2015

Journal of Nanomaterials

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Monolithic nanostructured metallic porous structures with a hierarchy of pore size ranging from ca. 10 m to 1 nm are processed for use as microreactors. The technique is based on flow induced electroless deposition of metals on a porous template known as PolyHIPE Polymer. The process is conducted in a purpose built flow reactor using a processing protocol to allow uniform and efficient metal deposition under flow. Nickel chloride and sodium hypophosphite were used as the metal and reducing agent, respectively. Electroless deposition occurs in the form of grains with a composition of Ni P in which the grain size range was ca. 20-0.2 m depending on the composition of the metal deposition solution. Structure formation in the monoliths starts with heat treatment above 600 ∘ C resulting in the formation of a 3-dimensional network of capillary-like porous structures which form the walls of large arterial pores. These monoliths have a dense but porous surface providing mechanical strength for the monolith. The porous capillary-like arterial pore walls provide a large surface area for any catalytic activity. The mechanisms of metal deposition and nanostructure formation are evaluated using scanning electron microscopy, energy dispersive X-ray analysis, XRD, BET-surface area, and mercury intrusion porosimetry.

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Section: Polyhipe Polymers As Monolithic Microreactors and Asmentioning

confidence: 99%

Preparation of Nanostructured Microporous Metal Foams through Flow Induced Electroless Deposition

Akay

Calkan

2015

Journal of Nanomaterials

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“…Due to the unavailability of a suitable technology that does not have the burden of economies of scale, large quantities of oil-field gases are flared causing environmental damage without any benefit. Furthermore, unlike oil and gas technologies, renewable energy production from biomass and biomass waste require small-scaledistributed production facilities in compliance with the distributed nature of the feedstock availability [37][38][39][40].…”

Section: Process Intensification (Pi) and Integrated Process Intensifmentioning

confidence: 99%

Process intensification in gas-to-liquid reactions: plasma promoted Fischer-Tropsch synthesis for hydrocarbons at low temperatures and ambient pressure

Al-Harrasi¹,

Zhang²,

Akay³

2013

Green Processing and Synthesis

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The Fischer-Tropsch synthesis (FTS) for the conversion of carbon monoxide and hydrogen to higher hydrocarbons was investigated over a supported Cu/Co catalyst promoted by dielectric-barrier discharges (DBDs) at relatively low temperatures and ambient pressure. The effect of plasma power, operation pressure, and H 2 /CO molar ratio on the activity and selectivity of the catalyst in a DBD reactor were studied. The fresh and used catalyst samples were characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray, and X-ray diffraction. We also used DBDs in catalyst preparation as a technique to enhance metal distribution on the catalyst support. The present study reveals that plasma can promote the FTS over a Cu/Co-based catalyst at low temperatures and ambient pressure. The formation of methane was strongly suppressed in plasma. In contrast to conventional FTS, CO conversion was higher at low operating pressure than that at higher pressure in the DBD-promoted FTS, which indicates the presence of a new reaction path for FTS.

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“…Due to these attributes, PHPs and their metallic, ceramic or composite forms have been used in the emerging technology of Process Intensification (PI), which facilitates the establishment of green processes. In addition to use of PHPs in analytical sciences, the important specific applications of PHPs in PI include: Agro‐PI, Bio‐PI, Chemical‐PI, including Separation processes, Energy and Environmental‐PI, and medicine and tissue engineering . A recent review of some of these applications is available…”

Section: Introductionmentioning

confidence: 99%

“…In most of the large scale applications of PHPs, such as agriculture and separation and energy‐environmental processes, the bulk and surface functionality of PHP requires ion‐exchange capacity. The required anionic or cationic characteristics are dictated by the nature of the application.…”

Section: Introductionmentioning

confidence: 99%

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Surface modification of monolithic PolyHIPE Polymers for anionic functionality and their ion exchange behavior

Barlık

Keskinler

Kocakerìm

et al. 2015

J of Applied Polymer Sci

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Monolithic PolyHIPE Polymer (PHP), being a highly porous, low density, open cellular material was produced by polymerization of a high internal phase emulsion (HIPE) in which the polymerizable continuous phase consisted of monomers, styrene (STY), and divinyl benzene (DVB). The inner dispersed phase (90 vol %) was an aqueous solution containing 0.4 wt % potassium persulphate as initiator. The resulting porous structure had 12% crosslinking density. Surface chemistry of the monoliths was modified by chloromethylation and amination to impart anionic functionality. Surface modified monoliths had ion exchange capacity of 3.01 meq/g, and had the ability to uptake water about 10 times of its mass. It was used Cr (VI) ion removal from aqueous solution. The experimental results investigated for both the Langmuir and the Dubinin–Radushkevich adsorption models. The maximum Cr (VI) adsorptions are 126.6 mg Cr (VI)/g and 129.3 mg Cr (VI)/g, respectively. The mean free energy E of adsorption is 11.18 kJ/mol according to the Dubinin–Radushkevich adsorption model, indicating that the adsorption occurs through a chemical ion‐exchange process and it is not diffusion limited. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42286.

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Syngas cleaning with nano-structured micro-porous ion exchange polymers in biomass gasification using a novel downdraft gasifier

Cited by 19 publications

References 24 publications

Preparation of Nanostructured Microporous Metal Foams through Flow Induced Electroless Deposition

Preparation of Nanostructured Microporous Metal Foams through Flow Induced Electroless Deposition

Process intensification in gas-to-liquid reactions: plasma promoted Fischer-Tropsch synthesis for hydrocarbons at low temperatures and ambient pressure

Surface modification of monolithic PolyHIPE Polymers for anionic functionality and their ion exchange behavior

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