4.8 Article

Ambient Carbon-Neutral Ammonia Generation via a Cyclic Microwave Plasma Process

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

Post-plasma catalysis: charge effect on product selectivity in conversion of methane and nitrogen plasma to ethylene and ammonia

Sarojini Tiwari et al.

Summary: The main challenge in simultaneous conversion of methane and nitrogen to ethylene and ammonia under plasma conditions is the low selectivity. To address this challenge, an innovative strategy - post-plasma catalysis outside a microwave-enhanced plasma zone (MWP) was explored. Experimentally, the post-plasma species were identified and the selectivity was improved through the use of a thermally heated Ag-Pd/CeO2 catalyst.

CATALYSIS SCIENCE & TECHNOLOGY (2023)

Article Engineering, Chemical

Application of an equation-oriented framework to formulate and estimate parameters of chemical looping reaction models

Chinedu O. Okoli et al.

Summary: Accurate reaction models are crucial for the design and optimization of chemical looping combustion reactors. This study demonstrates the application of a novel equation-oriented framework to develop reduction reaction kinetic models for an iron-based oxygen carrier in CLC. By formulating an optimization problem, the kinetic parameters are estimated to provide the best fit to experimental data. The model predicts the state of the oxygen carrier with low mean square error values across the full range of validation data.

AICHE JOURNAL (2022)

Article Thermodynamics

Techno-economic assessment of blue and green ammonia as energy carriers in a low-carbon future

Carlos Arnaiz del Pozo et al.

Summary: This study evaluates the prospects of blue and green ammonia as future energy carriers and compares them with conventional technologies. The results show that blue ammonia is more economically attractive, while green ammonia has higher costs in technology integration and energy.

ENERGY CONVERSION AND MANAGEMENT (2022)

Article Chemistry, Physical

Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS process

Siobhan Brown et al.

Summary: This study reports the synthesis of ammonia on nitridation in CoMo for the first time during a chemical looping ammonia synthesis experiment. The results provide evidence for the presence of a dynamic surface, a shrinking core, and counter diffusion. The study also establishes the existence of an unreacted oxide core containing molybdenum bronzes, HxMoO3, which complicates the established Mars-van Krevlen mechanism.

CATALYSIS COMMUNICATIONS (2022)

Article Chemistry, Multidisciplinary

Plasma-Catalyst Reactivity Control of Surface Nitrogen Species through Plasma-Temperature-Programmed Hydrogenation to Ammonia

Patrick M. Barboun et al.

Summary: This article investigates the adsorption of nitrogen on metal catalysts activated by nonthermal plasma. The experimental results confirm the conversion of plasma-activated nitrogen into ammonia through surface catalyzed pathways. The study also shows the relationship between the hydrogenation ability of the catalyst and the desorption temperature of NH3.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2022)

Article Green & Sustainable Science & Technology

Green ammonia from air, water, and renewable electricity: Energy costs using natural gas reforming, solid oxide electrolysis, liquid water electrolysis, chemical looping, or a Haber-Bosch loop

Peter H. Pfromm et al.

Summary: The purpose of this study is to compare the energy cost of different design alternatives for ammonia production using air, water, and renewable electricity. The results show that the energy costs of the alternatives investigated here are not substantially different. Direct solid oxide electrolysis (SOE) combined with a Haber-Bosch (H-B) synthesis loop, or SOE to provide H2 and N2 separately combined with atmospheric pressure chemical looping for ammonia synthesis (CLAS) may be attractive for small scale production or remote locations.

JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY (2022)

Article Chemistry, Physical

Molybdenum-based nitrogen carrier for ammonia production via a chemical looping route

Song Yang et al.

Summary: Chemical looping ammonia synthesis (CLAS) using Mo2N as nitrogen carrier was demonstrated to be an effective and sustainable method for ammonia generation. The two-step CLAS showed high N release/fixation efficiency and achieved a higher NH3 production rate compared to the thermo-catalytic ammonia synthesis route catalyzed by Mo2N. The study also confirmed the stability and feasibility of using Mo2N as an NC during the CLAS process.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Energy & Fuels

High thermal stability Si-Al based N-carrier for efficient and stable chemical looping ammonia generation

Chuhao Xiong et al.

Summary: Chemical looping ammonia generation (CLAG) is a promising technology for high yield and low CO2 emission in ammonia production. However, the stability of existing N-carriers during cyclic N-sorption/desorption is problematic. This research addresses this challenge through elemental doping and support deposition, resulting in improved cyclic performance.

APPLIED ENERGY (2022)

Article Chemistry, Multidisciplinary

Deep Learning-Assisted Investigation of Electric Field-Dipole Effects on Catalytic Ammonia Synthesis

Mingyu Wan et al.

Summary: External electric fields can modify binding energies and enhance catalytic performance, and the use of deep learning algorithms can accelerate the prediction of field-dependent energies with transferability.

JACS AU (2022)

Article Chemistry, Physical

Microwave heated chemical looping ammonia synthesis over Fe and CoMo particles

Sean W. Brown et al.

Summary: This study investigates the performance of chemical looping ammonia synthesis (CLAS) materials under traditional thermal heating and microwave heating, and finds that microwave heating outperforms traditional heating for Fe and CoMo materials. The study also generalizes the principles of microwave catalysis and the heating of metallic particles, and examines the deactivation and regeneration of the materials.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

Article Engineering, Environmental

Thermodynamic feasibility analysis of distributed chemical looping ammonia synthesis

Laron Burrows et al.

Summary: The paper explores intensified Chemical looping for Ammonia Synthesis (CLAS) as a process suitable for remote deployment at Stranded Natural Gas (SNG) sites, aiming to address the challenges in utilizing SNG. By systematically evaluating CLAS, promising chemical loops such as Ca3N2/CaH2, SrH2/Sr3N2, MnO2/Mn5N2 and MoO2/Mo2N are found, indicating potential for further research towards a distributed ammonia synthesis solution.

CHEMICAL ENGINEERING JOURNAL (2021)

Review Chemistry, Physical

N2 Fixation by Plasma-Activated Processes

Lea R. Winter et al.

Summary: This paper compares the energy requirements, CO2 emissions, and commodity prices of alternative plasma-activated ammonia synthesis with the conventional Haber-Bosch process. Economic positive externalities are evaluated for renewable energy-powered modular ammonia production, with a 6-fold improvement in plasma process efficiency projected to make it competitive. Technological prospects for achieving the thresholds are discussed, including advancements in plasma-catalyst synergy and direct reactions of N-2 with plasma-activated water.

JOULE (2021)

Article Chemistry, Physical

Plasma-catalytic ammonia synthesis beyond thermal equilibrium on Ru-based catalysts in non-thermal plasma

Kevin H. R. Rouwenhorst et al.

Summary: Recent research has shown that at temperatures above 300 degrees C, Ru catalysts exhibit significant thermal activity for NH3 synthesis, while at temperatures below 300 degrees C, plasma-catalytic ammonia synthesis is mainly attributed to adsorption of N radicals.

CATALYSIS SCIENCE & TECHNOLOGY (2021)

Article Engineering, Chemical

Chemical Looping of Manganese to Synthesize Ammonia at Atmospheric Pressure: Sodium as Promoter

Wrya Mohammadi Aframehr et al.

CHEMICAL ENGINEERING & TECHNOLOGY (2020)

Article Chemistry, Physical

Integrated system of thermochemical cycle of ammonia, nitrogen production, and power generation

Firman Bagja Juangsa et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

Review Green & Sustainable Science & Technology

Islanded ammonia power systems: Technology review & conceptual process design

Kevin H. R. Rouwenhorst et al.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2019)

Article Chemistry, Multidisciplinary

Vibrationally Excited Activation of N2 in Plasma-Enhanced Catalytic Ammonia Synthesis: A Kinetic Analysis

Kevin H. R. Rouwenhorst et al.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2019)

Article Chemistry, Physical

Elucidating the Roles of Electric Fields in Catalysis: A Perspective

Fanglin Che et al.

ACS CATALYSIS (2018)

Article Chemistry, Physical

Plasma Technology: An Emerging Technology for Energy Storage

Annemie Bogaerts et al.

ACS ENERGY LETTERS (2018)

Article Chemistry, Physical

Overcoming ammonia synthesis scaling relations with plasma-enabled catalysis

Prateek Mehta et al.

NATURE CATALYSIS (2018)

Article Green & Sustainable Science & Technology

Towards sustainable agriculture: Fossil-free ammonia

Peter H. Pfromm

JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY (2017)

Article Physics, Applied

A pulsed plasma jet with the various Ar/N2 mixtures

A. Barkhordari et al.

JOURNAL OF THEORETICAL AND APPLIED PHYSICS (2017)

Review Physics, Fluids & Plasmas

Foundations of atmospheric pressure non-equilibrium plasmas

Peter J. Bruggeman et al.

PLASMA SOURCES SCIENCE & TECHNOLOGY (2017)

Article Engineering, Chemical

Plasma-Surface Interactions in Plasma Catalysis

Erik C. Neyts

PLASMA CHEMISTRY AND PLASMA PROCESSING (2016)

Article Chemistry, Applied

The Denitridation of Nitrides of Iron, Cobalt and Rhenium Under Hydrogen

A. -M. Alexander et al.

TOPICS IN CATALYSIS (2013)

Article Chemistry, Physical

An Ionicity Rationale to Design Solid phase Metal Nitride Reactants for Solar Ammonia Production

Ronald Michalsky et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2012)

Article Physics, Fluids & Plasmas

Modeling of microwave-induced plasma in argon at atmospheric pressure

M. Baeva et al.

PHYSICAL REVIEW E (2012)

Article Chemistry, Applied

The Reduction of Various Nitrides under Hydrogen: Ni3N, Cu3N, Zn3N2 and Ta3N5

A. -M. Alexander et al.

TOPICS IN CATALYSIS (2012)

Article Physics, Applied

Microwave N2-Ar plasma torch. II. Experiment and comparison with theory

J. Henriques et al.

JOURNAL OF APPLIED PHYSICS (2011)

Article Physics, Applied

Microwave N2-Ar plasma torch. I. Modeling

J. Henriques et al.

JOURNAL OF APPLIED PHYSICS (2011)

Article Chemistry, Physical

A comparison of the reactivity of lattice nitrogen in Co3Mo3N and Ni2Mo3N catalysts

J. S. J. Hargreaves et al.

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL (2009)

Article Chemistry, Physical

The microstructure and properties of commercial pure iron modified by plasma nitriding

Chang-Zi Chen et al.

SOLID STATE IONICS (2008)

Article Materials Science, Multidisciplinary

Synthesis of ammonia using microwave discharge at atmospheric pressure

Jun Nakajima et al.

THIN SOLID FILMS (2008)

Article Optics

Optical emission spectroscopy of Ar-N2 mixture plasma

A. Qayyum et al.

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER (2007)

Article Chemistry, Physical

Activation energy of hydrogen, oxygen, and nitrogen diffusion in metals

VB Vykhodets et al.

DOKLADY PHYSICAL CHEMISTRY (2005)