Preparation and Study of Pd Catalysts Supported on Activated Carbon Cloth (ACC) for Direct Synthesis of H2O2 from H2 and O2

Gudarzi, Davood; Ratchananusorn, Warin; Турунен, Илкка; Salmi, Tapio; Heinonen, Maarit

doi:10.1007/s11244-013-0014-5

Cited by 23 publications

(8 citation statements)

References 31 publications

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“…They found that the sulphated zirconia support enhances the rate of the H 2 O 2 formation while diminishing both the H 2 O 2 hydrogenolysis and H 2 O 2 dismutation. 44,113,133 The role of gold in the catalytic reaction seems to be a really complex one, improving the performance of Pd particles by changing their size, morphology and electron density and making them more suited to the reaction requirements. However the role of the sulphated support is not completely understood yet.…”

Section: Promotersmentioning

confidence: 99%

“…It was shown that the acid-pretreated carbon clearly showed an enhanced concentration of surface carboxylic acid functional groups. 120,[124][125][126]133 These species may play a key role in the enhanced activity of the observed acid-pretreated catalysts and may aid the dispersion of the metals during preparation, but the real role of the acidic functional groups on the surface may be another one. XPS of the untreated set of samples showed that the surface comprises ca.…”

Section: Promotersmentioning

confidence: 99%

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Engineering in direct synthesis of hydrogen peroxide: targets, reactors and guidelines for operational conditions

et al. 2014

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The demand for hydrogen peroxide is booming since it is considered as one of the most environmentally friendly and versatile chemical oxidants available and has a wide range of applications. The annual market, close to 3000 kt per year being produced via the auto-oxidation process (with 2-ethyl anthraquinone (traditional) or amyl anthraquinone for mega-plants), is mostly supplied by the company Solvay (30%), followed by Evonik (20%) and Arkema (13%). Nevertheless, the dream of a direct synthesis process is close to a century old and it has gained momentum in research efforts during the last decade with more than 15 groups active in the world. In this review, we focus the discussion on the targets, e.g. plant tonnage, the reactors and the most feasible industrial operational conditions, based on our experience and point of view using the chemical engineering tools available. Thus, direct synthesis can be competitive when on-site production is required and capacities less than 10 kt per year are He has led and participated in 3 EU, 6 national/regional projects and 10+ SME contracts and has published 30+ research papers. Teresa MorenoTeresa Moreno obtained her degree in Chemical Engineering from Complutense University (Madrid, Spain) and later completed her PhD in Chemical Engineering at the University of Valladolid (Spain, 2011) studying the catalytic direct synthesis of hydrogen peroxide in supercritical CO 2 and the online determination of the product using Raman spectroscopy. She is currently a Research Scientist in the Industrial Bioactive Technologies Group at Callaghan Innovation (New Zealand) working on the development of processes for adding value to natural materials toward high value products and applications, including the development of sustainable technologies using supercritical fluids. View Article OnlineView Journal | View Issue and semi-continuous modes of operation. However, at the moment, demonstrations of continuous operations as well as carefully determined kinetics are needed in order to scale up the process. Finally, operational conditions, including the catalyst composition (active metal, oxidation state and support), promoters (halides and acids-pH-isoelectric point), solvents, pressure and temperature need to be carefully analysed. In our opinion, as we try to show here, H 2 O 2 direct synthesis is a competitive process and is ready for larger scale demonstration. Also, more than a hundred patents within the area support this claim, although the barriers of technology demonstration and further licensing are still pending.

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Section: Promotersmentioning

confidence: 99%

Section: Promotersmentioning

confidence: 99%

Engineering in direct synthesis of hydrogen peroxide: targets, reactors and guidelines for operational conditions

et al. 2014

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“…As a result, the interior of micro pores is available to the aqueous solution of the metal during impregnation leading to a uniform distribution of metal particles on the support. [18] The HRTEM images along with the lattice fringes and the SAED patterns for different catalysts are provided in Figure 3.…”

Section: Results and Discussioncatalyst Preparation And Characterizationmentioning

confidence: 99%

“…Prior to impregnation, acid treatment of GAC leads to incorporation of oxygen‐containing functional groups on GAC which decreases the hydrophobicity of the surfaces. As a result, the interior of micro pores is available to the aqueous solution of the metal during impregnation leading to a uniform distribution of metal particles on the support [18] …”

Section: Introductionmentioning

confidence: 99%

An Experimental and Theoretical Investigation on the Oxidation of CO over Pd/C Derived from the Spent Pd Catalyst

et al. 2021

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Development of novel materials and methodologies for removal of toxic and poisonous carbon monoxide (CO) gas is important to solve serious health and environmental related problems. Existing materials used for the removal of CO gas are quite expensive and therefore, the synthesis of low‐cost and earth‐abundant catalyst for CO oxidation is urgently needed. In the present work, we report the preparation of Pd nanoparticles loaded on porous carbon supports from the spent Pd/C and the subsequent catalytic oxidation of CO. Different Pd based catalysts are prepared by using various reducing agents with different reduction potential such as formaldehyde, green tea, ascorbic acid, and sodium borohydride. The prepared catalysts are characterized and employed for the oxidation of CO. All the prepared catalysts show excellent activity towards CO oxidation at room temperature either in presence or absence of moisture depending on the Pd0/Pd+2 ratio in Pd/C which follows the order Pd/C−NaBH4>Pd/C−HCHO>Pd/C−Ascorbic acid>Pd/C−Green tea. Experimental findings of the present work also reveal that depending on the oxidation state, and moisture plays a critical role in Pd catalytic properties on the oxidation of CO. Theoretical calculations performed using Vienna ab initio Simulation Package (VASP) support the experimental observations and further confirm that the reaction proceeds through Langmuir‐Hinshelwood mechanism.

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“…The drawbacks include the multi-step process, and high energy consumption, et cetera [ 7 ]. Catalytic systems such as Pd and bi-metallic Au–Pd have been studied for the direct production of H 2 O 2 from H 2 and O 2 [ 8 – 11 ]. Such direct methods are effective for quantitative production of H 2 O 2 , but have an attendant high risk because of the explosive nature of the H 2 /O 2 mixture.…”

Section: Introductionmentioning

confidence: 99%

Solar-Driven Hydrogen Peroxide Production Using Polymer-Supported Carbon Dots as Heterogeneous Catalyst

Gogoi

Karak

2017

Nano-Micro Lett.

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Safe, sustainable, and green production of hydrogen peroxide is an exciting proposition due to the role of hydrogen peroxide as a green oxidant and energy carrier for fuel cells. The current work reports the development of carbon dot-impregnated waterborne hyperbranched polyurethane as a heterogeneous photo-catalyst for solar-driven production of hydrogen peroxide. The results reveal that the carbon dots possess a suitable band-gap of 2.98 eV, which facilitates effective splitting of both water and ethanol under solar irradiation. Inclusion of the carbon dots within the eco-friendly polymeric material ensures their catalytic activity and also provides a facile route for easy catalyst separation, especially from a solubilizing medium. The overall process was performed in accordance with the principles of green chemistry using bio-based precursors and aqueous medium. This work highlights the potential of carbon dots as an effective photo-catalyst. Electronic supplementary materialThe online version of this article (doi:10.1007/s40820-017-0143-7) contains supplementary material, which is available to authorized users.

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Preparation and Study of Pd Catalysts Supported on Activated Carbon Cloth (ACC) for Direct Synthesis of H2O2 from H2 and O2

Cited by 23 publications

References 31 publications

Engineering in direct synthesis of hydrogen peroxide: targets, reactors and guidelines for operational conditions

Engineering in direct synthesis of hydrogen peroxide: targets, reactors and guidelines for operational conditions

An Experimental and Theoretical Investigation on the Oxidation of CO over Pd/C Derived from the Spent Pd Catalyst

Solar-Driven Hydrogen Peroxide Production Using Polymer-Supported Carbon Dots as Heterogeneous Catalyst

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