The synthesis and characterization of sol-gel-derived cornhusk support for low-temperature catalytic methane combustion (LTCMC) were investigated in this study. The prepared cornhusk support was impregnated with palladium and cerium oxide (Pd/CeO) via the classical incipient wetness method. The resulting catalyst was characterized using various techniques, including X-ray diffraction (XRD), N physisorption (BET), transmission electron microscopy (TEM), and hydrogen temperature-programmed reduction (H-TPR). The catalytic performance of the Pd/CeO/CHSiO catalyst was evaluated for methane combustion in the temperature range of 150-600 °C using a temperature-controlled catalytic flow reactor, and its performance was compared with a commercial catalyst. The results showed that the Pd/CeO dispersed on SiO from the cornhusk ash support (Pd/CeO/CHSiO) catalyst exhibited excellent catalytic activity for methane combustion, with a conversion of 50% at 394 °C compared with 593 °C for the commercial silica catalyst (Pd/CeO/commercial). Moreover, the Pd/CeO/CHSiO catalyst displayed better catalytic stability after 10 h on stream, with a 7% marginal loss in catalytic activity compared with 11% recorded for the Pd/CeO/commercial catalyst. The N physisorption and H-TPR results indicated that the cornhusk SiO support possessed a higher surface area and strong reducibility than the synthesized commercial catalyst, contributing to the enhanced catalytic activity of the Pd/CeO/SiO catalyst. Overall, the SiO generated from cornhusk ash exhibited promising potential as a low-cost and environmentally friendly support for LTCMC catalysts.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10180291 | PMC |
| http://dx.doi.org/10.3390/nano13091450 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Adjustment of Molecular Sorption Equilibrium on Catalyst Surface for Boosting Catalysis.
Acc Chem Res
January 2025
Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
ConspectusFor chemical reactions with complex pathways, it is extremely difficult to adjust the catalytic performance. The previous strategies on this issue mainly focused on modifying the fine structures of the catalysts, including optimization of the geometric/electronic structure of the metal nanoparticles (NPs), regulation of the chemical composition/morphology of the supports, and/or adjustment of the metal-support interactions to modulate the reaction kinetics on the catalyst surface. Although significant advances have been achieved, the catalytic performance is still unsatisfactory.
View Article and Find Full Text PDFSupport effect on methane combustion over iridium catalysts: Unraveling the metal-support interaction mechanism.
J Colloid Interface Sci
January 2025
School of Environmental Science and Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071 China; Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo 315211 China. Electronic address:
The redox properties of iridium (Ir) active component are critically important in methane combustion. Interface engineering is highly effective in modulating the redox properties of active metals via tailoring the metal-support interaction (MSI). Herein, Ir catalysts supported on different carriers (TiO, CeO, AlO) were synthesized and evaluated for methane combustion.
View Article and Find Full Text PDFMonitoring the trends of carbon monoxide and tropospheric formaldehyde in Edo State using Sentinel-5P and Google Earth Engine from 2018 to 2023.
Environ Monit Assess
January 2025
Laboratory for Ecotoxicology and Environmental Forensics, University of Benin, PMB 1154, Benin City, Nigeria.
This research was carried out to assess the concentrations of carbon monoxide (CO) and formaldehyde (HCHO) in Edo State, Southern Nigeria, using remote sensing data. A secondary data collection method was used for the assessment, and the levels of CO and HCHO were extracted annually from Google Earth Engine using information from Sentinel-5-P satellite data (COPERNISCUS/S5P/NRTI/L3_) and processed using ArcMap, Google Earth Engine, and Microsoft Excel to determine the levels of CO and HCHO in the study area from 2018 to 2023. The geometry of the study location is highlighted, saved and run, and a raster imagery file of the study area is generated after the task has been completed with a 'projection and extent' in the Geographic Tagged Image File Format (.
View Article and Find Full Text PDFSimulation study on catalytic oxidation of low concentration mine gas in an oxidation device.
Sci Rep
January 2025
Safety Technology Center of Guizhou Coal Mine Safety Supervision Bureau, Guiyang, 550081, Guizhou, China.
Anthropogenic emissions of non-CO greenhouse gases, such as low-concentration coal mine methane (cCH < 30 vol%), have a significant impact on global warming. The main component of coal mine methane is methane (CH), which is both a greenhouse gas and a high-quality clean energy gas. To study the combustion and heat transfer reactions of low-concentration coal mine methane in a catalytic oxidation device, a numerical simulation approach was employed to establish a model of the catalytic oxidation device that includes periodic boundary conditions, methane combustion mechanisms, and turbulent-laminar flow characteristics.
View Article and Find Full Text PDFInvestigation of combustion characteristics of critical quenching hydrogen mixing ratios in the presence of ordered porous media.
Sci Rep
December 2024
College of Safety Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China.
In order to promote low-carbon sustainable development in the ecological environment and improve the efficiency of hydrogen and natural gas energy utilization, this project carried out research on the explosive effects of different thicknesses of ordered porous media on the hydrogen-methane gas mixture. A detailed discussion was conducted based on the critical quenching hydrogen blending ratio under the thicknesses of 50 mm and 60 mm of ordered porous media. The results indicate that the critical quenching hydrogen blending ratio is 9% for a thickness of 50 mm and 20% for a thickness of 60 mm, indicating that greater thickness enhances flame suppression capabilities.
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!