Sono-dispersion of bimetallic Ni–Co over zeolite Y used in conversion of greenhouse gases CH4/CO2 to high valued syngas

Sharifi, Mahdi; Haghighi, Mohammad; Abdollahifar, Mozaffar

doi:10.1016/j.jngse.2015.03.006

Cited by 37 publications

(16 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This also means that both NiO and ZrO 2 loading on Zeolite NaY significantly reduced the surface area of Zeolite NaY. This might be due to the effects of sonication treatment which caused the agglomeration of active metal Ni on the surface of Zeolite NaY where it could lead to blockage of pores and reduces the overall surface area of Zeolite NaY [17]. …”

Section: Transmission Electron Microscopementioning

confidence: 94%

“…Sonochemically assisted reactions showed lower reaction times with enhanced reaction rate. It enables production of small and high uniform particles sizes with high surface area, metal dispersion and defects that have been shown to play a crucial role in catalysis [15][16][17][18][19][20]. The utilization of sonochemical treatment in the synthesis of the catalysts was proven to show significant increase in the catalytic activity, stability and selectivity of catalysts [20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effects of Different Ratios of Sonochemically Assisted Nickel Oxide and Zirconium Oxide Catalysts in Syngas Production

2017

MJAS

View full text Add to dashboard Cite

Heterogeneous catalytic cracking is currently one of the most effective ways for both reducing tar content and enhancing hydrogen (H 2 ) content in syngas at relatively low temperature, besides being environmental friendly. Sonochemical treatment has also been shown to lower reaction times with enhanced reaction rate and enables production of particles with high surface area. Two different types of metal oxides, which are Nickel Oxide (NiO) and Zirconium Oxide (ZrO 2 ) at combinations of 1:1, 1:2 and 2:1 ratios with Zeolite NaY as the supporter were synthesized via sonochemical treatment. The catalysts were then characterized using X-Ray Diffraction (XRD), Temperature Programmed Reduction in H 2 /Argon (TPR-H 2 ), Brunauer-EmmettTeller surface measurement (BET), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). From SEM and TEM analysis, nickel tends to agglomerate and form globular shapes, zirconium forms coral-like branching structure and Zeolite NaY forms stacks of cubic clumps. The most promising NiO to ZrO 2 ratio for syngas production is 1:1 because it removes the most reactive oxygen during hydrogen reduction at 0.83 x10 21 atoms/g, has small crystallite size at 56.90 nm and has the highest surface area for maximum contact with the reactants at 506.52 m 2 /g. Generally, sonochemical treatment also reduces the catalysts crystallite size (54.83 nm) and increases the catalysts surface area (506.52 m 2 /g) and oxygen removal (0.83 x10 21 atoms/g) as well as lowers the reduction temperature (637 K) which is favourable in term of production cost.Keywords: heterogeneous catalysts, nickel oxide, zirconium oxide, zeolite, syngas Abstrak Perekahan pemangkin heterogen adalah salah satu cara terkini yang paling efektif untuk mengurangkan kandungan tar dan juga meningkatkan kandungan hidrogen (H 2 ) di dalam singas pada suhu rendah, di samping mesra alam sekitar. Rawatan sonokimia juga telah dibuktikan dapat mengurangkan masa tindak balas di samping meningkatkan kadar tindak balas dan membolehkan penghasilan partikel dengan luas permukaan yang tinggi. Dua jenis besi oksida berbeza, iaitu Nikel Oksida (NiO) dan Zirkonium Oksida (ZrO 2 ) dalam kombinasi nisbah 1:1, 1:2 dan 2:1 dan Zeolit NaY sebagai penyokong dihasilkan melalui rawatan sonokimia. Katalis -katalis tersebut kemudian dianalis menggunakan pembelauan sinar-X (XRD), Penurunan Suhu Berprogram (TPR-H 2 ), pengukuran permukaan Brunauer-Emmett-Teller (BET), Mikroskop Imbasan Elekron (SEM) dan Mikroskop Elektron Transmisi (TEM). Daripada analisis SEM dan TEM, nikel cenderung untuk bergumpal dan membentuk glob besar, zirkonium membentuk struktur seperti karang bercabang dan Zeolit NaY membentuk lapisan kubik. Nisbah NiO kepada ZrO 2 yang paling atom/g, mempunyai saiz kristal yang kecil iaitu 56.90 nm dan mempunyai luas permukaan yang paling tinggi pada 506.52 m 2 /g untuk kontak maksimum dengan bahan tindak balas. Umumnya rawatan sonokimia juga mengurangkan saiz kristal katalis (54.83 nm) dan meningkatkan luas permukaan pemangki...

show abstract

Section: Transmission Electron Microscopementioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

The Effects of Different Ratios of Sonochemically Assisted Nickel Oxide and Zirconium Oxide Catalysts in Syngas Production

2017

MJAS

View full text Add to dashboard Cite

show abstract

“…Catalyst deactivation also could be correlated to the oxidation of nanosized NiCo particles by water, produced through a reversed water–gas shift reaction pathway. With prolonged time on stream, sintering and growth of NiCo make them less susceptible to oxidation, which slowly leads to their reduction and reactivation. − The rate of catalyst regeneration is dependent on the rate of NiCo bimetallic particle coalescing and sintering and is consequently much slower over the high-surface-area ceria-based support than the rate of the initial deactivation (Figure ).…”

Section: Catalyst Developmentmentioning

confidence: 99%

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

Zagaynov

2021

Energy Fuels

View full text Add to dashboard Cite

Methane transformation into more valuable products has attracted extensive attention. Synthesis gas is an important intermediate product in the chemical industry. Several syngas production methods are available, depending on the purpose of the industrial application. A major limitation of the processes is the rapid deactivation of the catalyst, which has been commonly attributed to the sintering of the active sites of catalyst and carbon formations on these sites, induced by methane decomposition and CO disproportionation. The catalyst consists of an active component and support. Ceria-based systems have been extensively employed as the support because of their unique redox properties and high oxygen storage capacity. The most promising approach is to design an excellent active site of the catalyst, based on noble or transition metals. A comparison of perspective active components, especially polymetallic components, is considered here.

show abstract

“…The utilization of ultrasonic power in the synthesis of Co-Ni bimetallic catalyst has resulted in higher metal dispersion [63] Co Plasma treatment was applied to synthesize the bimetallic nanocatalysts to improve the uniformity of metal dispersion [66] Ni-Co MgO 1073 92 0.98…”

Section: Bimetallic Catalystsmentioning

confidence: 99%

Recent Advances in Supported Metal Catalysts for Syngas Production from Methane

2018

View full text Add to dashboard Cite

Abstract:Over the past few years, great attention is paid to syngas production processes from different resources especially from abundant sources, such as methane. This review of the literature is intended for syngas production from methane through the dry reforming (DRM) and the steam reforming of methane (SRM). The catalyst development for DRM and SRM represents the key factor to realize a commercial application through the utilization of more efficient catalytic systems. Due to the enormous amount of published literature in this field, the current work is mainly dedicated to the most recent achievements in the metal-oxide catalyst development for DRM and SRM in the past five years. Ni-based supported catalysts are considered the most widely used catalysts for DRM and SRM, which are commercially available; hence, this review has focused on the recent advancements achieved in Ni catalysts with special focus on the various attempts to address the catalyst deactivation challenge in both DRM and SRM applications. Furthermore, other catalytic systems, including Co-based catalysts, noble metals (Pt, Rh, Ru, and Ir), and bimetallic systems have been included in this literature review to understand the observed improvements in the catalytic activities and coke suppression property of these catalysts.

show abstract

Sono-dispersion of bimetallic Ni–Co over zeolite Y used in conversion of greenhouse gases CH4/CO2 to high valued syngas

Cited by 37 publications

References 57 publications

The Effects of Different Ratios of Sonochemically Assisted Nickel Oxide and Zirconium Oxide Catalysts in Syngas Production

The Effects of Different Ratios of Sonochemically Assisted Nickel Oxide and Zirconium Oxide Catalysts in Syngas Production

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

Recent Advances in Supported Metal Catalysts for Syngas Production from Methane

Contact Info

Product

Resources

About