Results 1 to 10 of about 266,768 (294)

Demagnetizing Ferromagnetic Catalysts to the Sabatier Optimal of Haber–Bosch Process [PDF]

JACS Au, 2023
Achieving the Sabatier optimal of a chemical reaction has been the central topic in heterogeneous catalysis for a century. However, this ultimate goal was greatly hindered in previous catalyst design strategies since the active sites indeed changed.
Gaomou Xu, Licheng Sun, Tao Wang
doaj   +4 more sources

Development and Recent Progress on Ammonia Synthesis Catalysts for Haber–Bosch Process [PDF]

Advanced Energy & Sustainability Research, 2021
Due to its essential use as a fertilizer, ammonia synthesis from nitrogen and hydrogen is considered to be one of the most important chemical processes of the last 100 years.
John Humphreys, Rong Lan, Shanwen Tao
doaj   +3 more sources

Fabrication of Needle-Like Silicon Nanowires by Using a Nanoparticles-Assisted Bosch Process for Both High Hydrophobicity and Anti-Reflection [PDF]

Micromachines, 2021
In this work, a modified Bosch etching process is developed to create silicon nanowires. Au nanoparticles (NPs) formed by magnetron sputtering film deposition and thermal annealing were employed as the hard mask to achieve controllable density and high ...
Zengxing Zhang, Guohua Liu, Kaiying Wang
doaj   +2 more sources

Comparison between Bosch and STiGer Processes for Deep Silicon Etching [PDF]

Micromachines, 2021
The cryogenic process is well known to etch high aspect ratio features in silicon with smooth sidewalls. A time-multiplexed cryogenic process, called STiGer, was developed in 2006 and patented.
Thomas Tillocher, Jack Nos, Gaëlle Antoun, Philippe Lefaucheux, Mohamed Boufnichel, Rémi Dussart   +5 more
doaj   +3 more sources

Liquid Sorption-Enhanced Haber-Bosch Process. [PDF]

Ind Eng Chem Res
The use of a liquid sorbent in a traditional Haber-Bosch process enables significant improvements in energy efficiency and potential cost savings for arguably the most important chemical process on the planet. The approach presented in this report employs an incompressible liquid sorbent that absorbs and releases ammonia (NH3) under specific conditions.
Thornburg NE, Miller JH, Xi W, Long H, Brown KD, Paeper C, Martinez R, Kliegle GA, Pivovar BS.   +8 more
europepmc   +3 more sources

Beyond Haber-Bosch: The renaissance of the Claude process

International Journal of Hydrogen Energy, 2021
Ammonia may be one of the energy carriers in the hydrogen economy. Although research has mostly focused on electrochemical ammonia synthesis, this however remains a scientific challenge. In the current article, we discuss the feasibility of single-pass thermochemical ammonia synthesis as an alternative to the high-temperature, high-pressure Haber-Bosch
Kevin H R Rouwenhorst, Leon Lefferts
exaly   +2 more sources

Operating envelope of Haber-Bosch process design for power-to-ammonia. [PDF]

RSC Adv, 2018
The Haber–Bosch process is viable for power-to-ammonia, as it can be operated for a wide range of the operating envelope while maintaining the process variables' operational, hydrogen feed intake and ammonia production flexibilities.
Cheema II, Krewer U.
europepmc   +7 more sources

Operando probing of the surface chemistry during the Haber-Bosch process. [PDF]

Nature
AbstractThe large-scale conversion of N2and H2into NH3(refs. 1,2) over Fe and Ru catalysts3for fertilizer production occurs through the Haber–Bosch process, which has been considered the most important scientific invention of the twentieth century4. The active component of the catalyst enabling the conversion was variously considered to be the oxide5 ...
Goodwin CM, Lömker P, Degerman D, Davies B, Shipilin M, Garcia-Martinez F, Koroidov S, Katja Mathiesen J, Rameshan R, Rodrigues GLS, Schlueter C, Amann P, Nilsson A.   +12 more
europepmc   +4 more sources

Etch mechanism of an Al2O3 hard mask in the Bosch process

Micro and Nano Engineering, 2022
The etching of high aspect ratio structures in silicon via the Bosch process is essential in modern technologies such as microelectromechanical systems (MEMS) and through‑silicon vias (TSV) fabrication.
Martin Drost, Steffen Marschmeyer, Mirko Fraschke, Oksana Fursenko, Florian Bärwolf, Ioan Costina, Mamathamba Kalishettyhalli Mahadevaiah, Marco Lisker   +7 more
doaj   +2 more sources

An Electrochemical Haber-Bosch Process [PDF]

Joule, 2020
Summary Ammonia, produced via the Haber-Bosch (HB) process, is globally the leading chemical in energy consumption and carbon dioxide emissions. In ammonia plants, hydrogen is generated by steam-methane reforming (SMR) and water-gas shift (WGS) and, subsequently, is purified for the high-pressure ammonia synthesis.
Vasileios Kyriakou, Ioannis Garagounis, Anastasios Vourros, Eirini Vasileiou, Michael Stoukides   +4 more
openaire   +1 more source