Nitrogen

Häussinger, Peter; Leitgeb, Paul; Schmücker, Bernd

doi:10.1002/14356007.a17_457

Cited by 2 publications

(2 citation statements)

References 32 publications

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“…In the three scenarios based on SMR, N 2 is supplied within the air stream . In the scenarios not relying on SMR, cryogenic distillation provides high-purity N 2 from the air . We omitted alternative technologies for air separation, for example, PSA or membranes, because they are either unsuitable for such large capacities or cannot meet the desired purity specifications, respectively. , …”

Section: Methodsmentioning

confidence: 99%

Planetary Boundaries Analysis of Low-Carbon Ammonia Production Routes

D’Angelo

Cobo

Tulus

et al. 2021

ACS Sustainable Chem. Eng.

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At present, the synthesis of ammonia through the Haber−Bosch (HB) process accounts for 1.2% of the global carbon emissions, representing roughly one-fourth of the global fossil consumption from the chemical industry, which creates a pressing need for alternative low-carbon synthesis routes. Analyzing seven essential planetary boundaries (PBs) for the safe operation of our planet, we find that the standard HB process is unsustainable as it vastly transgresses the climate change PB. In order to identify more responsible strategies from this integrated perspective, we assess the absolute sustainability level of 34 alternative routes where hydrogen (H 2 ) is supplied by steam methane reforming with carbon capture and storage, biomass gasification, or water electrolysis powered by various energy sources. We found that some of these scenarios could substantially reduce the global impact of fossil HB, yet alleviating the impact on climate change could critically exacerbate the impacts on other Earth-system processes. Furthermore, we identify that reducing the cost of electrolytic H 2 is the main avenue toward the economic appeal of the most sustainable routes. Our work highlights the need to embrace global impacts beyond climate change in the assessment of decarbonization routes of fossil chemicals. This approach enabled us to identify more suitable alternatives and associated challenges toward environmental and economically attractive ammonia synthesis.

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Section: Methodsmentioning

confidence: 99%

Planetary Boundaries Analysis of Low-Carbon Ammonia Production Routes

D’Angelo

Cobo

Tulus

et al. 2021

ACS Sustainable Chem. Eng.

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“…The synthesis of ammonia from its elements, nitrogen and hydrogen, is a long-standing challenge in coordination chemistry and homogeneous catalysis. [1] While the Haber-Bosch ammonia synthesis has transformed fertilizer production and hence global food supplies, [2][3][4] the fossil fuel inputs and associated CO 2 pollution inspires the search for methods compatible with renewable H 2 . [5] Catalytic methods that rely on proton-coupled electron transfer (PCET), [6] similar to those operative in nitrogenase enzymes, [7] are particularly attractive.…”

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confidence: 99%

Synthesis and Ligand Modification Chemistry of a Molybdenum Dinitrogen Complex: Redox and Chemical Activity of a Bis(imino)pyridine Ligand

2014

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The bis(imino)pyridine 2,6-(2,6-iPr2-C6H3N=CPh)2-C5H3N ((iPr)BPDI) molybdenum dinitrogen complex, [{((iPr)BPDI)Mo(N2)}2(μ2,η(1),η(1)-N2)] has been prepared and contains both weakly (terminal) and modestly (bridging) activated N2 ligands. Addition of ammonia resulted in sequential N-H bond activations, thus forming bridging parent imido (μ-NH) ligands with concomitant reduction of one of the imines of the supporting chelate. Using primary and secondary amines, model intermediates have been isolated that highlight the role of metal-ligand cooperativity in NH3 oxidation.

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Nitrogen

Abstract: The article contains sections titled: 1. History 2. Properties … Show more

Cited by 2 publications

References 32 publications

Planetary Boundaries Analysis of Low-Carbon Ammonia Production Routes

Planetary Boundaries Analysis of Low-Carbon Ammonia Production Routes

Synthesis and Ligand Modification Chemistry of a Molybdenum Dinitrogen Complex: Redox and Chemical Activity of a Bis(imino)pyridine Ligand

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