Catalysts

Research

Jump to: Review

20 pages, 8615 KiB

Open AccessFeature PaperArticle

Oxy-Steam Reforming of Liquefied Natural Gas (LNG) on Mono- and Bimetallic (Ag, Pt, Pd or Ru)/Ni Catalysts

by Pawel Mierczynski, Magdalena Mosinska, Waldemar Maniukiewicz, Krasimir Vasilev and Malgorzata Iwona Szynkowska-Jozwik

Catalysts 2021, 11(11), 1401; https://doi.org/10.3390/catal11111401 - 19 Nov 2021

Cited by 4 | Viewed by 2768

Abstract

This work presents, for the first time, the comparative physicochemical and reactivity studies of a range of bimetallic Pt-Ni, Pd-Ni, Ru-Ni, and Ag-Ni catalysts in the oxy-steam reforming (OSR) of liquefied natural gas (LNG) reaction towards hydrogen generation. In order to achieve the [...] Read more.

This work presents, for the first time, the comparative physicochemical and reactivity studies of a range of bimetallic Pt-Ni, Pd-Ni, Ru-Ni, and Ag-Ni catalysts in the oxy-steam reforming (OSR) of liquefied natural gas (LNG) reaction towards hydrogen generation. In order to achieve the intended purpose of this work, a binary oxide CeO₂·ZrO₂ (1:2) support was prepared via a co-precipitation method. The catalysts’ physicochemical properties were studied using X-ray diffraction (XRD), BET, TPR-H₂, TPD-NH₃, SEM-EDS and XPS methods. The highest activity in the studied process was exhibited by the 1%Pt-5%Ni catalyst supported on CeO₂·ZrO₂ (1:2) system. The highest activity of this system is explained by the specific interactions occurring between the components of the active phase and between the components of the active phase and the carrier itself. The activity results showed that this catalytic system exhibited above 71% of the methane conversion at 600 °C and 60% yield of hydrogen formation. The results of this work demonstrate that the Pt-Ni and Ru-Ni catalytic systems hold promise to be applied in the production of hydrogen to power solid oxide fuel cells. Full article

(This article belongs to the Special Issue Recent Advances in Nickel-Based Catalysts)

► Show Figures

Graphical abstract

20 pages, 5658 KiB

Open AccessFeature PaperArticle

Influence of NiO/La₂O₃ Catalyst Preparation Method on Its Reactivity in the Oxy-Steam Reforming of LNG Process

by Magdalena Mosinska, Waldemar Maniukiewicz, Malgorzata I. Szynkowska-Jozwik and Pawel Mierczynski

Catalysts 2021, 11(10), 1174; https://doi.org/10.3390/catal11101174 - 28 Sep 2021

Cited by 4 | Viewed by 2644

Abstract

The oxy-steam reforming of liquefied natural gas reaction (OSR-LNG) is promising process for syngas generation. In this paper, the catalytic properties of NiO/La₂O₃ systems prepared by wet impregnation and co-precipitation methods were extensively investigated in OSR-LNG reaction. The physicochemical properties [...] Read more.

The oxy-steam reforming of liquefied natural gas reaction (OSR-LNG) is promising process for syngas generation. In this paper, the catalytic properties of NiO/La₂O₃ systems prepared by wet impregnation and co-precipitation methods were extensively investigated in OSR-LNG reaction. The physicochemical properties of the studied catalytic materials were determined using various techniques including Temperature programmed reduction (TPR-H₂), Temperature programmed desorption (TPD-NH₃), Brunauer, Emmett and Teller (BET), X-ray diffraction (XRD) and Scanning electron microscopy (SEM) with an energy dispersive X-Ray spectrometer (EDS). Reactivity measurements performed in the OSR-LNG process showed that the catalyst preparation method and the calcination temperature significantly affected the activity of NiO/La₂O₃ catalysts in the OSR-LNG reaction. The catalytic activity tests showed that NiO/La₂O₃ system prepared by a wet impregnation method and calcined at 700 °C showed the total conversion of the LNG component at 900 °C and the highest H₂ yield at 700 and 900 °C. The phase composition studies confirmed the formation of the LaNiO₃ structure in the case of the NiO/La₂O₃ catalyst prepared by wet impregnation, calcined at the temperature of 700 °C. Catalytic activity measurements showed that the reactivity of the catalysts was related to their phase composition and acidity. SEM images of spent catalysts showed that the smallest amount of carbon deposit was detected on the surface of the most active systems. Full article

(This article belongs to the Special Issue Recent Advances in Nickel-Based Catalysts)

► Show Figures

Graphical abstract

23 pages, 7882 KiB

Open AccessFeature PaperArticle

Effect of Ag-Addition on the Catalytic and Physicochemical Properties of Ni/ZrO₂ Catalyst in Oxy-Steam Reforming of CH₄ and LNG Processes

by Magdalena Mosinska, Natalia Stepinska, Karolina Chalupka, Waldemar Maniukiewicz, Malgorzata I. Szynkowska and Pawel Mierczynski

Catalysts 2020, 10(8), 855; https://doi.org/10.3390/catal10080855 - 1 Aug 2020

Cited by 6 | Viewed by 2770

Abstract

This work presents, for the first time, the catalytic studies of bimetallic Ag-Ni catalysts in the oxy-steam reforming (OSR) of liquefied natural gas (LNG) to hydrogen generation. The physicochemical properties of monometallic Ni and bimetallic catalysts were investigated using various techniques, such as: [...] Read more.

This work presents, for the first time, the catalytic studies of bimetallic Ag-Ni catalysts in the oxy-steam reforming (OSR) of liquefied natural gas (LNG) to hydrogen generation. The physicochemical properties of monometallic Ni and bimetallic catalysts were investigated using various techniques, such as: BET, TPR-H₂, TPD-NH₃, XRD, TG and SEM-EDS. The catalytic studies showed that the promotion of 20% Ni/ZrO₂ catalyst by silver (by 1 or 2 wt.%) improves the efficiency of the produced hydrogen in the oxy-steam reforming of LNG at high temperature. The promotional effect of silver on the reducibility of a Ni/ZrO₂ catalyst has been proven. The interactions between Ag and Ni have been proven, and explain the catalytic activity of the catalysts in the investigated processes. TG-DTA-MS results obtained for the spent catalysts proved that the small addition of silver to monometallic nickel catalyst reduces the amount of the carbon deposit formed on the catalyst surface during the oxy-steam reforming of LNG process. Obtained results in this work confirmed that liquid natural gas processing may become an alternative to fossil fuels and confirmed the validity of the hydrogen production via oxy-steam reforming of LNG. Full article

(This article belongs to the Special Issue Recent Advances in Nickel-Based Catalysts)

► Show Figures

Graphical abstract

16 pages, 2632 KiB

Open AccessArticle

Dry Reforming of Methane Using Ce-modified Ni Supported on 8%PO₄ + ZrO₂ Catalysts

by Ahmed A. Ibrahim, Ahmed S. Al-Fatesh, Nadavala Siva Kumar, Ahmed E. Abasaeed, Samsudeen O. Kasim and Anis H. Fakeeha

Catalysts 2020, 10(2), 242; https://doi.org/10.3390/catal10020242 - 18 Feb 2020

Cited by 22 | Viewed by 4858

Abstract

Dry reforming of methane (DRM) was studied in the light of Ni supported on 8%PO₄ + ZrO₂ catalysts. Cerium was used to modify the Ni active metal. Different percentage loadings of Ce (1%, 1.5%, 2%, 2.5%, 3%, and 5%) were tested. [...] Read more.

Dry reforming of methane (DRM) was studied in the light of Ni supported on 8%PO₄ + ZrO₂ catalysts. Cerium was used to modify the Ni active metal. Different percentage loadings of Ce (1%, 1.5%, 2%, 2.5%, 3%, and 5%) were tested. The wet incipient impregnation method was used for the preparation of all catalysts. The catalysts were activated at 700 °C for ½ h. The reactions were performed at 800 °C using a gas hourly space velocity of 28,000 mL (h·gcat)⁻¹. X-ray diffraction (XRD), N₂ physisorption, hydrogen temperature programmed reduction (H₂-TPR), temperature programmed oxidation (TPO), temperature programmed desorption (TPD), and thermogravimetric analysis (TGA) were used for characterizing the catalysts. The TGA analysis depicted minor amounts of carbon deposition. The CO₂-TPD results showed that Ce enhanced the basicity of the catalysts. The 3% Ce loading possessed the highest surface area, the largest pore volume, and the greatest pore diameter. All the promoted catalysts enhanced the conversions of CH₄ and CO₂. Among the promoted catalysts tested, the 10Ni + 3%Ce/8%PO₄ + ZrO₂ catalyst system operated at 1 bar and at 800 °C gave the highest conversions of CH₄ (95%) and CO₂ (96%). The stability profile of Cerium-modified catalysts (10%Ni/8%PO₄ + ZrO₂) depicted steady CH₄ and CO₂ conversions during the 7.5 h time on stream. Full article

(This article belongs to the Special Issue Recent Advances in Nickel-Based Catalysts)

► Show Figures

Figure 1

16 pages, 5248 KiB

Open AccessArticle

Selective Hydrogenation of Acetylene Catalysed by a B₁₂N₁₂ Cluster Doped with a Single Nickel Atom: A DFT Study

by Yun Wang and Lihua Kang

Catalysts 2020, 10(1), 115; https://doi.org/10.3390/catal10010115 - 13 Jan 2020

Cited by 8 | Viewed by 4328

Abstract

To obtain a catalyst based on a non-precious metal that can replace traditional palladium-based selective catalysts of acetylene hydrogenation, the catalytic performances of two different configurations of a B₁₂N₁₂ cluster doped with a single nickel atom were studied by a [...] Read more.

To obtain a catalyst based on a non-precious metal that can replace traditional palladium-based selective catalysts of acetylene hydrogenation, the catalytic performances of two different configurations of a B₁₂N₁₂ cluster doped with a single nickel atom were studied by a density functional theory computational approach. After analysing the effect that the adsorption of reactants onto the clusters has on the reaction path, we determined the lowest energy path for the acetylene double hydrogenation. Comparing the acetylene hydrogenation activities and ethylene product selectivities of the B₁₁N₁₂Ni and B₁₂N₁₁Ni clusters, which have different doping sites, we determined the activities of these two catalysts to be similar to each other; however, the B₁₁N₁₂Ni cluster was calculated to have higher selectivity for ethylene as a product. This difference may be related to the moderate adsorption of hydrogen and acetylene on the B₁₁N₁₂Ni cluster. As a new type of nickel-based single-atom catalyst, B₁₁N₁₂Ni clusters may have research value in the selective hydrogenation of acetylene. Full article

(This article belongs to the Special Issue Recent Advances in Nickel-Based Catalysts)

► Show Figures

Graphical abstract

12 pages, 7800 KiB

Open AccessArticle

Highly-Dispersed Ni-NiO Nanoparticles Anchored on an SiO₂ Support for an Enhanced CO Methanation Performance

by Jiangwei Li, Panpan Li, Jiangbing Li, Zhiqun Tian and Feng Yu

Catalysts 2019, 9(6), 506; https://doi.org/10.3390/catal9060506 - 4 Jun 2019

Cited by 101 | Viewed by 11746

Abstract

Highly-dispersed Ni-NiO nanoparticles was successfully anchored on an SiO₂ support via a one-pot synthesis and used as heterogeneous catalysts for CO methanation. The as-obtained Ni-NiO/SiO₂ catalyst possessed a high Ni content of 87.8 wt.% and exhibited a large specific surface area [...] Read more.

Highly-dispersed Ni-NiO nanoparticles was successfully anchored on an SiO₂ support via a one-pot synthesis and used as heterogeneous catalysts for CO methanation. The as-obtained Ni-NiO/SiO₂ catalyst possessed a high Ni content of 87.8 wt.% and exhibited a large specific surface area of 71 m²g⁻¹ with a main pore diameter of 16.7 nm. Compared with an H₂-reduced Ni-NiO/SiO₂ (i.e., Ni/SiO₂) catalyst, the Ni-NiO/SiO₂ displayed a superior CO methanation performance. At the temperature of 350 °C, the Ni-NiO/SiO₂ showed a CO conversion of 97.1% and CH₄ selectivity of 81.9%, which are much better values than those of Ni/SiO₂. After a 50-h stability test, the Ni-NiO/SiO₂ catalyst still had an overwhelming stability retention of 97.2%, which was superior to the 72.8% value of the Ni/SiO₂ catalyst. Full article

(This article belongs to the Special Issue Recent Advances in Nickel-Based Catalysts)

► Show Figures

Graphical abstract

Review

Jump to: Research

24 pages, 4980 KiB

Open AccessEditor’s ChoiceReview

Applicability of Nickel-Based Catalytic Systems for Hydrodehalogenation of Recalcitrant Halogenated Aromatic Compounds

by Tomáš Weidlich

Catalysts 2021, 11(12), 1465; https://doi.org/10.3390/catal11121465 - 30 Nov 2021

Cited by 5 | Viewed by 3610

Abstract

This review summarizes recent applications of nickel as a nonprecious metal catalyst in hydrodehalogenation (HDH) reactions of halogenated aromatic compounds (Ar–Xs). Nickel-based HDH catalysts were developed for reductive treatment of both waste containing concentrated Ar–Xs (mainly polychlorinated benzenes) and for wastewater contaminated with [...] Read more.

This review summarizes recent applications of nickel as a nonprecious metal catalyst in hydrodehalogenation (HDH) reactions of halogenated aromatic compounds (Ar–Xs). Nickel-based HDH catalysts were developed for reductive treatment of both waste containing concentrated Ar–Xs (mainly polychlorinated benzenes) and for wastewater contaminated with Ar–Xs. Ni-catalyzed HDH enables the production of corresponding nonhalogenated aromatic products (Ar–Hs), which are principally further applicable/recyclable and/or Ar–Hs, which are much more biodegradable and can be mineralized during aerobic wastewater treatment. Developed HDH methods enable the utilization of both gaseous hydrogen via the direct HDH process or other chemical reductants as a source of hydrogen utilized in the transfer of the hydrodehalogenation process. This review highlights recent and major developments in Ni-catalyzed hydrodehalogenation topic since 1990. Full article

(This article belongs to the Special Issue Recent Advances in Nickel-Based Catalysts)

► Show Figures

Figure 1

26 pages, 2180 KiB

Open AccessFeature PaperReview

Oxy-Steam Reforming of Natural Gas on Ni Catalysts—A Minireview

by Magdalena Mosinska, Malgorzata I. Szynkowska and Pawel Mierczynski

Catalysts 2020, 10(8), 896; https://doi.org/10.3390/catal10080896 - 7 Aug 2020

Cited by 17 | Viewed by 7752

Abstract

Nowadays, the reforming of natural gas is the most common of hydrogen or syngas generation process. Each reforming process leads to the achievement of specific goals and benefits related to investment costs. The disadvantage of the reforming process is the need to preclean [...] Read more.

Nowadays, the reforming of natural gas is the most common of hydrogen or syngas generation process. Each reforming process leads to the achievement of specific goals and benefits related to investment costs. The disadvantage of the reforming process is the need to preclean it mostly from the sulfur and nitrogen compounds. The solution to this problem may be liquefied natural gas (LNG). Liquefied natural gas has recently been seen as an energy source and may be a promising replacement for natural gas. The constant development of the pipeline network, safe transport and a lot of advantages of LNG were contributed to the research development related to the usage of LNG in energy generation technologies. The presented review is a literature discussion on the processing of methane used to produce hydrogen with particular emphasis on the processes of oxy-steam reforming of natural or liquefied natural gas (OSR-LNG). In addition, a key consideration in this article includes Ni catalyst systems used in the oxy-steam reforming of methane or LNG reactions. An analysis of the OSR process conditions, the type of catalyst and the OSR of the methane reaction mechanism may contribute to the development of a modern, cheap catalyst system, which is characterized by high activity and stability in the oxy-steam reforming of natural gas or LNG (OSR-LNG). Full article

(This article belongs to the Special Issue Recent Advances in Nickel-Based Catalysts)

► Show Figures

Figure 1

Journal Menu

Journal Browser

Recent Advances in Nickel-Based Catalysts

Share This Special Issue

Special Issue Editor

Special Issue Information

Keywords

Benefits of Publishing in a Special Issue

Published Papers (8 papers)

Research

Review

Further Information

Guidelines

MDPI Initiatives

Follow MDPI