Results 51 to 60 of about 25,209 (263)

A Recent Progress on Upgrading of Furfural and Derivatives into Green Transport Fuels and Precursors via CC Coupling Reactions

Advanced Energy and Sustainability Research, Volume 6, Issue 7, July 2025.
This review highlights recent advancements in converting lignocellulosic biomass to fuel precursors. It emphasizes the role of FUR and 2‐methylfuran in aldol condensation and hydroxyalkylation–alkylation reactions. The article discusses their efficiency, potential applications, and emerging technologies that promise cleaner and more sustainable energy ...
Errol D. Saluta, Mahlet N. Gebresillase, Jeong Gil Seo   +2 more
wiley   +1 more source

Hypergolic droplet‒film interaction dynamics at high temperatures

Droplet, Volume 4, Issue 3, July 2025.
The whole reaction process can be distinctly identified as three stages based on the corona size and the temperature temporal evolution. In the coalescence regime, T* maintains quasi‐stationary values during initial contact, corresponding to hydrodynamic coalescence process. Consequently, the first stage is defined as the inertia‐dominant stage. In the
Yuxin Song, Zuohua Huang, Chenglong Tang
wiley   +1 more source

Regenerative Cooling Comparison of LOX/LCH₄ and LOX/LC₃H₈ Rocket Engines Using the One-Dimensional Regenerative Cooling Modelling Tool ODREC

Applied Sciences, 2023
Due to the extreme temperatures inside the combustion chambers of liquid propellant rocket engines, the walls of the combustion chamber and the nozzle are cooled by either the fuel or the oxidizer in what is known as regenerative cooling.
Yigithan Mehmet Kose, Murat Celik
doaj   +1 more source

Factorial Analysis of the Influence of Both Water and Oxygen on Extruded Double Base Rocket Propellant Decomposition

Propellants, Explosives, Pyrotechnics, Volume 50, Issue 7, Page 106-114, July 2025.
ABSTRACT The decomposition mechanisms of double base rocket propellants are well known and reported, but the influence of atmospheric conditions such as water and oxygen is poorly understood. In this work, the influence of water and oxygen on an extruded double base (EDB) rocket propellant aged between 70 and 100°C was examined using heat flow ...
Alonso Romero Jabalquinto, Nathalie Mai, Moritz Heil, Guillermo Frades Castedo, Philip P. Gill   +4 more
wiley   +1 more source

Increasing the efficiency and stability of fuel supply to the combustion chamber of a liquid rocket engine by spray nozzles

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение
In this paper, various configurations of jet nozzles are analyzed, as well as their design. The effects of the inlet chamfer of jet nozzles on their flow rate and range are considered.
Yu. I. Ageenko, A. S. Bubnova
doaj   +1 more source

A Critical Review of Limitations and Challenges in Advancement of HNF as a Green Oxidizer for Composite Solid Propellant Formulations

Propellants, Explosives, Pyrotechnics, Volume 50, Issue 7, Page 11-30, July 2025.
ABSTRACT Hydrazinium nitroformate (HNF) is a chlorine‐free, high‐energy oxidizer with promising applications in green propulsion systems. This review examines the thermal decomposition, combustion kinetics, flame structure, and behavior of HNF, while critically evaluating the current body of literature.
Lakshay Bansal, Prakhar Jindal, Vineet Kumar Rathi   +2 more
wiley   +1 more source

Study and Characterization of Intermediates Used in the Production of the Oxidizer Ammonium Dinitramide

Propellants, Explosives, Pyrotechnics, Volume 50, Issue 7, Page 95-105, July 2025.
ABSTRACT The aerospace industry is continually seeking materials that offer higher performance and lower environmental impact. In chemical propulsion, ammonium dinitramide (ADN) represents a significant advance in this direction as a potential replacement for ammonium perchlorate in solid propellant formulations.
Josiane R. C. Silva, Lucas B. Oliveira, Jessica O. Silva, Letícia M. S. V. Queiroz, Kamila P. Cardoso, Márcio Y. Nagamachi, Luiz F. A. Ferrão   +6 more
wiley   +1 more source

HOW DATA CENTERS HAVE COME TO MATTER: Governing the Spatial and Environmental Footprint of the ‘Digital Gateway to Europe’

International Journal of Urban and Regional Research, Volume 49, Issue 4, Page 757-778, July 2025.
Abstract Data centers, the material backbone of smart cities, power the digital economy and advanced digital services. Metaphors of ‘the cloud’ and ‘cloud computing’ obscure the massive computing and storage infrastructures, the resource flows and the land uses they mediate.
Jochen Monstadt, Katherine Saltzman
wiley   +1 more source

Sustainable Hydrogen Production, a Review of Methods, Types, Applications, Challenges, and Future Perspectives

Global Challenges, Volume 9, Issue 6, June 2025.
This graphical abstract illustrates sustainable hydrogen production methods integrating solar, wind, and biomass sources. It highlights electrolysis as the central green hydrogen pathway and contrasts renewable and industrial uses. Color‐coded hydrogen types depict the diversity in production technologies, emphasizing clean energy transitions and ...
Sajid Ali Ansari, Mir Waqas Alam, Neetu Dhanda, Misbah Sehar Abbasi, Mais Emad Ahmed, Alanoud bader alrashidi, Amani Mubarak Al‐Farhan, Buzuayehu Abebe   +7 more
wiley   +1 more source

The issue of ensuring the safe explosion of the spent orbital stages of a launch vehicle with propulsion rocket engine

MATEC Web of Conferences, 2017
A method for increasing the safe explosion of the spent orbital stages of a space launch vehicle (SLV) with a propulsion rocket engine (PRE) based on the gasification of unusable residues propellant and venting fuel tanks.
Trushlyakov Valeriy I., Zharikov Konstantin I.   +1 more
doaj   +1 more source