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Abrokwah RY, Ntow EB, Jennings T, Stevens-Boyd R, Hossain T, Swain J, Bepari S, Hassan S, Mohammad N, Kuila D. Cr and CeO 2 promoted Ni/SBA-15 framework for hydrogen production by steam reforming of glycerol. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:120945-120962. [PMID: 37947933 DOI: 10.1007/s11356-023-30748-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 10/25/2023] [Indexed: 11/12/2023]
Abstract
Ni/SBA-15 meso-structured catalysts modified with chromium and CeO2 (Ni-Cr-CeO2/SBA-15) were utilized to produce hydrogen from glycerol steam reforming (GSR). The catalysts were synthesized by a one-pot hydrothermal process and extensively characterized by analytical techniques such as N2 adsorption-desorption (BET), H2-temperature programmed reduction (H2-TPR), powder X-ray diffraction (PXRD), inductively coupled plasma-optical emission spectrometry (ICP-OES), and transmission electron microscopy (TEM). The low-angle XRD reflections affirmed that the catalysts were crystalline and possessed a 2D-ordered porosity. The BET results depicted that all the catalysts exhibited a good surface area ranging from 633 to 792m2/g, and the pore sizes were consistently in the mesoporous range (between 3 and 5 nm). TEM analysis of both calcined and spent catalysts revealed that the metal active sites were embedded in the hybrid CeO2-SiO2 support. Overall, the Ni-based catalysts exhibited higher glycerol conversion -12Ni-SBA-15-99.9%, 12Ni3CeO2-SBA-15-89.4%, and 8Ni4Cr3CeO2-SBA-15-99.7%. Monometallic 12Ni/SBA-15 performed exceptionally well, while 12Cr/SBA-15 performed poorly with the highest 71.48% CO selectivity. For short-term GSR reactions, CeO2 addition to 12Ni/SBA-15 did not have any effect, whereas Cr addition resulted in a 32% decrease in H2 selectivity. The long-term stability studies of 12Ni-SBA-15 showed H2 selectivity of ~ 64% and ~ 98% glycerol conversion. However, its activity was short-lived. After 20-30 h, the H2 selectivity and conversion dropped precipitously to 40%. The doping of mesoporous Ni/SBA-15 with Cr and CeO2 remarkably enhanced the long-term stability of the catalyst for 12Ni3CeO2-SBA-15, and 8Ni4Cr3CeO2-SBA-15 catalyst which showed ~ 58% H2 selectivity and ~ 100% conversion for the entire 60 h. Interestingly, Cr and CeO2 seem to improve the shelf-life of Ni-SBA-15 via different mechanistic pathways. CeO2 mitigated Ni poisoning through coke oxidation whereas Cr bolstered the catalyst stability via maintaining a well-defined pore size, structural rigidity, and integrity of the heterogeneous framework, thereby restricting structural collapse, and hence retard sintering of the Ni active sites during the long-term 60 h of continuous reaction. Hydrogen generation from renewable biomass like glycerol could potentially serve as a sustainable energy source and could substantially help reduce the carbon footprint of the environment.
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Affiliation(s)
- Richard Y Abrokwah
- Chemistry Department, North Carolina A&T State University, Greensboro, NC, 27411, USA.
- Applied Sciences and Technology, North Carolina A&T State University, Greensboro, NC, 27411, USA.
| | - Eric B Ntow
- Chemistry Department, North Carolina A&T State University, Greensboro, NC, 27411, USA
| | - Terrence Jennings
- Chemistry Department, North Carolina A&T State University, Greensboro, NC, 27411, USA
| | - Robert Stevens-Boyd
- Joint School of Nanoscience and Nanoengineering, North Carolina A&T State University, Greensboro, NC, 27411, USA
| | - Tashfin Hossain
- Chemistry Department, North Carolina A&T State University, Greensboro, NC, 27411, USA
| | - John Swain
- Chemistry Department, North Carolina A&T State University, Greensboro, NC, 27411, USA
| | - Sujoy Bepari
- Chemistry Department, North Carolina A&T State University, Greensboro, NC, 27411, USA
| | - Saif Hassan
- Chemistry Department, North Carolina A&T State University, Greensboro, NC, 27411, USA
| | - Nafeezuddin Mohammad
- Joint School of Nanoscience and Nanoengineering, North Carolina A&T State University, Greensboro, NC, 27411, USA
| | - Debasish Kuila
- Chemistry Department, North Carolina A&T State University, Greensboro, NC, 27411, USA
- Applied Sciences and Technology, North Carolina A&T State University, Greensboro, NC, 27411, USA
- Joint School of Nanoscience and Nanoengineering, North Carolina A&T State University, Greensboro, NC, 27411, USA
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Arslan M, Bepari S, Abrokwah R, Mohammad N, Shajahan J, Kuila D. Effect of Al2O3 Support on Co-Based SiO2 Core–Shell Catalysts for Fischer–Tropsch Synthesis in 3D Printed SS Microchannel Microreactor. Top Catal 2022. [DOI: 10.1007/s11244-022-01733-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Mohammad N, Aravamudhan S, Kuila D. Atomic Layer Deposition of Cobalt Catalyst for Fischer-Tropsch Synthesis in Silicon Microchannel Microreactor. NANOMATERIALS 2022; 12:nano12142425. [PMID: 35889650 PMCID: PMC9320865 DOI: 10.3390/nano12142425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 06/23/2022] [Accepted: 06/27/2022] [Indexed: 12/04/2022]
Abstract
In recent years, rising environmental concerns have led to the focus on some of the innovative alternative technologies to produce clean burning fuels. Fischer–Tropsch (FT) synthesis is one of the alternative chemical processes to produce synthetic fuels, which has a current research focus on reactor and catalyst improvements. In this work, a cobalt nanofilm (~4.5 nm), deposited by the atomic layer deposition (ALD) technique in a silicon microchannel microreactor (2.4 cm long × 50 µm wide × 100 µm deep), was used as a catalyst for atmospheric Fischer–Tropsch (FT) synthesis. The catalyst film was characterized by XPS, TEM-EDX, and AFM studies. The data from AFM and TEM clearly showed the presence of polygranular cobalt species on the silicon wafer. The XPS studies of as-deposited and reduced cobalt nanofilm in silicon microchannels showed a shift on the binding energies of Co 2p spin splits and confirmed the presence of cobalt in the Co0 chemical state for FT synthesis. The FT studies using the microchannel microreactor were carried out at two different temperatures, 240 °C and 220 °C, with a syngas (H2:CO) molar ratio of 2:1. The highest CO conversion of 74% was observed at 220 °C with the distribution of C1–C4 hydrocarbons. The results showed no significant selectivity towards butane at the higher temperature, 240 °C. The deactivation studies were performed at 220 °C for 60 h. The catalyst exhibited long-term stability, with only ~13% drop in the CO conversion at the end of 60 h. The deactivated cobalt film in the microchannels was investigated by XPS, showing a weak carbon peak in the XPS spectra.
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Affiliation(s)
- Nafeezuddin Mohammad
- Department of Nanoengineering, Joint School of Nanoscience and Nanoengineering, Greensboro, NC 27401, USA; (N.M.); (S.A.)
| | - Shyam Aravamudhan
- Department of Nanoengineering, Joint School of Nanoscience and Nanoengineering, Greensboro, NC 27401, USA; (N.M.); (S.A.)
| | - Debasish Kuila
- Department of Nanoengineering, Joint School of Nanoscience and Nanoengineering, Greensboro, NC 27401, USA; (N.M.); (S.A.)
- Department of Chemistry, North Carolina A&T State University, Greensboro, NC 27411, USA
- Correspondence:
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Bastakoti BP, Kuila D, Salomon C, Konarova M, Eguchi M, Na J, Yamauchi Y. Metal-incorporated mesoporous oxides: Synthesis and applications. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123348. [PMID: 32763679 DOI: 10.1016/j.jhazmat.2020.123348] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/24/2020] [Accepted: 06/27/2020] [Indexed: 06/11/2023]
Abstract
Mesoporous oxides are outstanding metal nanoparticle catalyst supports owing to their well-defined porous structures. Such mesoporous architectures not only prevent the aggregation of metal nanoparticles but also enhance their catalytic performance. Metal/metal oxide heterojunctions exhibit unique chemical and physical properties because of the surface reconstruction around the junction and electron transfer/interaction across the interface. This article reviews the methods used for synthesizing metal-supported hybrid nanostructures and their applications as catalysts for environmental remediation and sensors for detecting hazardous materials.
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Affiliation(s)
- Bishnu Prasad Bastakoti
- Department of Chemistry, Applied Sciences & Technology, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA.
| | - Debasish Kuila
- Department of Chemistry, Applied Sciences & Technology, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA
| | - Carlos Salomon
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, Queensland, Australia
| | - Muxina Konarova
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Miharu Eguchi
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia; International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Jongbeom Na
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia; International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yusuke Yamauchi
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia; International Research Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia; Department of Plant and Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
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