Recovery of chemicals and fuels from unrecyclable waste plastics at high temperatures (>800 °C) has received much research attention. Thermodynamic equilibrium calculation suggests that it is possible to perform the low-temperature steam reforming of polystyrene. In this study, we synthesized a Ni-Fe bimetallic catalyst for the low-temperature (500 °C) steam reforming of polystyrene. XRD characterization showed that Ni-Fe alloy was formed in the catalyst. Compared to conventional Ni catalysts, the Ni-Fe bimetallic catalysts can significantly increase the H/CO ratio in the produced gas with high gas production yield. The online gas analysis revealed that H, CO, and CO were formed in the same temperature range. H and CO were formed simultaneously through steam reforming reactions, and CO was formed through water-gas shift reaction. New morphologies of carbon deposition on the catalyst surface were found, suggesting that wax could be condensed on the catalyst surface at a low temperature.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.wasman.2020.01.017 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
New Approaches to the Creation of Highly Efficient Pd-Ag and Pd-Cu Membranes and Modeling of Their Hydrogen Permeability.
Int J Mol Sci
November 2024
Research Institute of Hydrogen Energy, Kuban State University, Krasnodar 350040, Russia.
Thin-film membranes of Pd-Ag and Pd-Cu alloys capable of releasing hydrogen in a wide temperature range have been developed. The surface activation of the membranes with a nanostructured coating made it possible to intensify hydrogen transport through Pd-containing membranes at low temperatures. This effect was achieved by accelerating limiting surface processes by increasing the active area of the membrane.
View Article and Find Full Text PDFLife cycle assessment on the role of HS-based hydrogen via HS-methane reforming for the production of sustainable fuels.
Sci Total Environ
December 2024
Research and Innovation Center on CO(2) and Hydrogen (RICH Center), Chemical and Petroleum Engineering Department, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates.
Meeting current decarbonization targets requires a shift to a hydrogen energy nexus, yet, water is a valuable resource for hydrogen production, shifting the perspective to the use of HS instead within the context of circular economy. A comprehensive understanding of the environmental impacts, using a cradle-to-gate life cycle assessment (LCA), was developed focusing on the operation of hydrogen sulfide-methane reforming (HSMR) for H production benchmarked to conventional technologies, steam methane reforming (SMR) and SMR + carbon capture (CC), as feedstock to produce sustainable fuels (i.e.
View Article and Find Full Text PDFRecent advances in CO capture and mineralization using layered double hydroxide-based materials: A review.
Environ Sci Pollut Res Int
November 2024
Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, 31216, Saudi Arabia.
Article Synopsis
- The increasing levels of carbon dioxide in the atmosphere have significant adverse effects, prompting research into materials for carbon capture, with layered double hydroxides (LDHs) showing promise due to their high surface area and CO adsorption capabilities.
- Despite existing reviews on carbon capture materials, there is a lack of comprehensive reviews specifically addressing LDH-based materials, highlighting the need for updated analysis in this rapidly evolving field.
- This review article aims to fill that gap by providing an overview of recent advancements, synthesis methods, performance factors, and future research directions in CO capture using LDHs, while also discussing existing challenges and knowledge gaps.
Audio-visual aesthetic teaching methods in college students' vocal music teaching by deep learning.
Sci Rep
November 2024
College of Music, Sookmyung Women's University, Seoul, 04310, South Korea.
In recent times, characterized by the rapid advancement of science and technology, the educational system has continuously evolved. Within this modern educational landscape, Science, Technology, Engineering, Arts, and Mathematics (STEAM) education has emerged as a prominent pedagogical paradigm, gaining substantial popularity in college-level instruction and capturing widespread societal attention. Notably, the cultivation of audio-visual aesthetic proficiency occupies a central role within this educational approach, prioritizing the enhancement of aesthetic sensibilities.
View Article and Find Full Text PDFMetal-Organic Framework-Templated Synthesis of Nickel-Alumina Nanocatalysts Improves Catalyst-Support Interaction for Higher Activity and Stability in Biogas Reforming under Controlled Oxidizing Conditions.
ACS Appl Mater Interfaces
December 2024
Department of Chemical Engineering, University of Illinois Chicago, Chicago, Illinois 60607, United States.
Tri-reforming methane with CO, O, and HO mixtures requires a delicate balance of dry-reforming, partial oxidation, and steam-reforming reactions to improve the CO conversion and H/CO ratio. Nickel-alumina has been reported before for the tri-reforming of methane, although at higher temperatures (>900 °C). This is because the current approaches for nickel-alumina synthesis are ineffective in generating stronger catalyst-support interactions necessary to maintain higher active sites and stall carbon nanotube (CNT) deposition.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!