Methane–Natural Clay Interfacial Interactions as Revealed by High-Pressure Magic Angle Spinning (MAS) Nuclear Magnetic Resonance (NMR) Spectroscopy

Fuels, Journal Year: 2025, Volume and Issue: 6(1), P. 16 - 16

Published: Feb. 18, 2025

The current investigation aims to offer fundamental, molecular- microscopic-level descriptions of methane gas inside natural source clay minerals. Texas montmorillonite (STx-1), Georgia kaolinite (KGa-2), and Ca2+-saturated (Ca-STx-1, Ca-bentonite) were utilized as subsurface model minerals for elucidating nano-confinement behaviors 13C-labeled gas. High-pressure magic angle spinning (MAS) nuclear magnetic resonance (NMR) was used describe the interactions between clays by varying temperature pressure. Proton-decoupled 13C-NMR spectra acquired at 28.2 bar 307 K, 32.6 346 56.4 65.1 112.7 130.3 K. In pure state, no significant thermal effect on behavior observed. However, there a perceptible variation in chemical shift position confined mixtures with up Conversely, altered pressure clays, attributed interaction surfaces or nanopore network clay–silica mixed phase. Pressure-induced shifts peak positions observed: 0.25 ppm (28.2–56.4 bar) 0.47 (56.4–112.3 For mixture, 0.32 bulk-like 0.20 under similar conditions. At increasing from caused exceeding 0.50 ppm, showing 0.64 0.57 shift. There only one mixture either (KGa-2) Ca-bentonite line broadening compared that methane. Still, two peaks observed STx-1, explained imbibition mobility pore network.

Language: Английский

---

Power generation potential and assessment of producer gas quality from blended rubber shell and palm kernel shell in open core downdraft gasifier

International Journal of Chemical Reactor Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Abstract The process which converts carbon-enriched material like phytomass, biowaste, etc. into combustible gas i.e., producer is known as gasification. It provides a certain amount of gasifying agent. increase in energy requirement needs sustainable environmental-friendly sources. Thus biomass renewable source that less pollution and serves the best backup. In this study, mixed rubber shell palm kernel input feed weighing ratios 3:1 were used agent gasification was air open-core downdraft gasifiers. experiment setup, equivalence ratio (ø) varies range 0.187–0.269. Finally, maximal power determined 63.796 kW having rate 38.9 kg/h at 0.269. results show maximum cold efficiency (CGE) calorific value PG 87.6 % 6.6332 MJ/m 3 0.242. highest values CH4 H2 Producer Gas 21.5 17 %. Also, phytomass consumption rates, flow (PG) heating values, compositions, evaluated evaluating gasifier performance. generated by blended – rich constituents many uses generating also fuel production. agricultural majority nations, wastes from agriculture not regularly maintained, therefore causing environmental disturbs ecological system. Therefore, present study recommends appropriate usage effectively.

Language: Английский

---

Thermodynamics of the Reaction CO + H₂O = CO₂ + H₂

Journal of Applied Mathematics and Physics, Journal Year: 2025, Volume and Issue: 13(03), P. 677 - 688

Published: Jan. 1, 2025

Language: Английский

---

Research on Co-Combustion of High-Calorific Biomass Obtained Using Gasification and Lignite for Sustainable Utilisation of Resources

Sustainability, Journal Year: 2025, Volume and Issue: 17(7), P. 2845 - 2845

Published: March 23, 2025

As part of the transition to low-carbon energy and for sustainable utilisation resources, it is necessary seek a replacement solid fossil fuels, but unfortunately, impossible completely abandon them various reasons at moment, so only partial with new, high-calorific, biomass-based fuels possible. The purpose this work determine typical parameters co-combustion carbonisate, coal their mixtures, taking into account synergetic effects influencing combustion intensity mixture. Carbonisate was obtained in process gasification pinewood through counter-blowing method temperature 800–900 °C, while air used as an oxidant. Basically, order obtain high-calorific coke metallurgical industry. Also, study, first time, carbonisate from 50% lignite. O/C H/C ratios were determined carbonisate. A technical elemental analysis investigated carried out. thermal oxidising medium applied determining slow heating under study. According results analysis, such ignition temperature, burnout maximum mass loss rate, index, etc., determined. It noted that calorific value carbonised wood two times higher than coal. index carbonisates 2.5–36% lower compared interaction components among themselves (in joint combustion), presence interactions between determined, which affected change heat release intensity. study may be useful retrofitting coal-fired boilers run on mixture containing If produced biomass, resulting gas could fuel by burning boiler.

Language: Английский

---

Energy management of hydrogen tanks

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

---

Towards a more sustainable future: Transitioning from thermochemical to electrochemical processes in clean energy technologies relevant to hydrogen‐containing fuels

The Canadian Journal of Chemical Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 28, 2024

Abstract This review paper explores the transition from thermochemical to electrochemical processes in clean energy technologies, particularly focusing on hydrogen‐containing fuels, namely hydrogen, ammonia, and methanol. The main characteristics of technologies are compared, followed by a focus specific approaches production each these e‐fuels. Steam methane reforming, partial oxidation hydrocarbons, coal biomass gasification, as well thermal decomposition autothermal reforming discussed for hydrogen production. Electrochemical green then described, including water electrolysis based alkaline, proton exchange membrane, anion exchange, solid oxide cells. further compares Haber–Bosch process with synthesis discusses methanol syngas, comparing them two approaches‐electrochemical CO 2 reduction reaction. Additionally, extracting ammonia briefly discussed. closes future prospects challenges traditional more sustainable processes. Despite promising such high initial capital costs, need advanced materials, scalability must be addressed. Ongoing research, policy incentives, collaborative efforts essential overcome barriers facilitate low‐carbon economy. In meantime, integration represents transformative approach chemical manufacturing management, offering pathway towards versatile industrial practices.

Language: Английский

---

Perspectives of Hydrogen Generation in Cavitation–Jet Hydrodynamic Reactor

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(20), P. 9415 - 9415

Published: Oct. 15, 2024

The article investigates the potential for producing hydrogen by combining methods of water splitting under cavitation and chemical activation aluminum in a high-speed cavitation–jet flow generated specialized hydrodynamic reactor. process spraying causes liquid heating itself until it reaches saturated vapor pressure, resulting creation vapor–gaseous products from molecules. can be explained through theory non-equilibrium low-temperature plasma formation within fluid. Special focus is also given to interactions occurring at interface boundary phase condition. primary solid formed on surfaces are bayerite, copper oxides (I II), iron carbide, compound magnesium hydroxide. A high yield 60% was achieved when using 0.1% sodium hydroxide solution as working compared demineralized water. Moreover, methane detected volume vapor–gas mixture, which could utilized address challenges decarbonization recycling aluminum-containing industrial domestic waste. This work provides contribution study mechanism generation processing aqueous alkali solutions, conditions created double chamber

Language: Английский

---