Site items in: Improved Haber-Bosch

3rd generation ammonia synthesis: new catalysts & production pathways
Article

We look at four new developments this week:

1. A team from DTU Energy and the Dalian Institute of Chemical Physics have uncovered a new class of alternative catalysts for mild condition ammonia synthesis. The ternary ruthenium complex hydrides Li4RuH6 and Ba2RuH6 avoid the energy-intensive pathway of nitrogen dissociation in a "synergistic" manner.

2. A team from the Korea Institute of Machinery and Materials reported a highly selective (95%) plasma ammonia synthesis method.

3. A team from Delft University of Technology has presented an present an "unconventional electrochemical design" that physically separates hydrogen and dinitrogen activation sites.

4. A team at the Max Planck Institute for Coal Research has demonstrated a new mechanochemical ammonia synthesis system that operates at room temperature and pressures as low as 1 bar.

Optimizing absorption to improve Haber-Bosch synthesis
Presentation

Ammonia absorber columns offer an alternative separation unit to replace condensation in the Haber-Bosch synthesis loop. Metal halide salts can selectively separate ammonia from the reactor outlet gas mixture and incorporate it into their crystal lattice with remarkably high thermodynamic capacity. While the salts’ working capacity can be limited and unstable when they are in their pure form, the capacity is stable and can be high when using a porous silica support. Here, we discuss optimal conditions for uptake and release of ammonia. The production capacity (ammonia processed per unit absorbent and per unit production time) depends on processing parameters…

Dynamic Analysis of Flex-gNH3 – a Green Ammonia Synthesis Process
Presentation

The future of a decarbonised ammonia production is seen as the alignment of the intermittent production of renewable energy, energy demands and ammonia process features. The current Haber-Bosch ammonia synthesis process can indeed be altered to enable green and sustainable ammonia production primarily being driven by renewable electricity. However, this will require to enhance current commercial Haber-Bosch (H-B) process flexibility with modifications to redefine the conventional H–B process with a new optimised control. The technical feasibility of green-ammonia (gNH3) process had been widely discussed and analysed focusing on its energy efficiency, the development of small-scale, distributed, modularised processes that can…

Stami Green Ammonia to play a key role in decarbonizing the fertilizer industry
Presentation

Stamicarbon green ammonia technology is based on the proven Haber-Bosh process and a perfect match for Power to X small and medium size project. It unique operational conditions and lean process design lead to a compact plant configuration with a minimum foot print requirement and thus a very competitive Capex when compared to other technologies. Moreover, the relatively high operating pressure makes it possible to obtain a high conversion per path using a minimum volume of catalyst. Maire Tecnimont group is applying Stami Green Ammonia technology in two green feasibility study projects, Greenfield Nitrogen located in the heart of the…

The Ammonia Academic Wrap:
Article

Welcome to the Ammonia Academic Wrap: a summary of all the latest papers, developments and emerging trends in the world of ammonia energy R&D. This week: "seamless" ammonia cracking tech from Northwestern, a new electrolysis catalyst, successful integration of ammonia synthesis and separation for improved efficiency, more research needed into transition metal catalysts for Haber Bosch, a novel, green power-to-ammonia to power system and a review on ammonia as a potential fuel.

Green Ammonia at Oil and Gas Scale
Presentation

Green Ammonia demand will grow massively over the coming years as it takes a central role in decarbonization, particularly in hard to abate sectors. In order to meet this demand, the industry must respond with projects at oil and gas scale.  This is the only way to deliver the volumes required to decarbonize and to do it at the prices needed to accelerate the energy transition.  The project concept pioneered by Intercontinental Energy offers a way forward. This presentation will outline Intercontinental Energy’s view of the green ammonia market and summarize the project template used throughout the global portfolio, followed by an…

Presentation

Our dependence on ammonia is not limited to development of fertilizers and other chemicals. Ammonia is being considered an energy vector, capable of being used for energy storage as well as fuel, due to its high energy density, ease of storage and transportation. Growing need for ammonia has forced development of alternate strategies for synthesis worldwide to serve as back up of Haber Bosch. Electrochemical ammonia synthesis is one such alternative. Earlier, we found that, nitrogen vacancy in metal-organic framework-derived disordered carbon is active for nitrogen reduction in alkaline electrolytes. We tried to investigate Fe-N4 sites for nitrogen reduction. It…

Yittria-Stabilized Zirconia (YSZ) Supports for Low Temperature Ammonia Synthesis
Presentation

NH3 is important as the raw material for fertilizer production and high hydrogen density (17.7 wt. %) energy carrier. Conventionally, NH3 is synthesized through the well-known Haber-Bosch process at 400-500°C and P~150 bar. Both critical reaction conditions and massive production (145 mt NH3 in 2014 globally) make it one of the most energy extensive process, consuming 1-2% of the world’s total energy expense. Here we introduce YSZ as a more active Ru catalyst support than traditionally used supports such as Al2O3. The addition of Cs promoter increased rates an order of magnitude higher by reducing the apparent activation energy from…

Presentation

Ammonia is considered as an important chemical used in agriculture, household cleaning and manufacturing. Mass production of ammonia mostly uses the Haber-Bosch process, reacting hydrogen and nitrogen. However, this process requires a moderately-elevated temperature (450°C) and high pressure (100 bar). Therefore, the development of technologies to produce ammonia with a moderate operation condition and a higher energy efficiency would have a positive economic impact and simulate new approaches in industrial chemistry. Reactors enable single discharge and multi-discharge operation have been built, and their performance proves the concept of conversion of nitrogen and hydrogen and demonstrates the ability to produce ammonia.…