Ammonia-fueled Solid Oxide Fuel Cell Recirculation Systems for Power Generation

The ammonia synthesis system was simulated with ASPEN PLUS and the influence of reaction temperature on the compression in synthesis loop and the energy consumption in heating and cooling process was discussed.The results indicated that the better the catalyst activity under low temperature the higher the ammonia concentration in synthesis converter and the lower the energy consumption in synthesis loop.

Ammonia production

Consumption

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Iron to catalyze ammonia synthesis at low temperature

Research Square (Research Square) (2022)

Masahiko Hara Masashi Hattori Natsuo Okuyama Hiyori Kurosawa

Abstract Haber-Bosch process produces ammonia to provide food for over 5 billion people; however, it is currently required to reduce the large global CO 2 emissions. It is indispensable to devise heterogeneous catalysts for the synthesis of ammonia below 100‒150 °C to minimize the energy consumption of the process. Here we report metallic iron as a catalyst for ammonia synthesis at 100 °C in combination with an electron-donating material. The iron catalyst revealed that iron can exhibit a few hundred to several thousand times higher efficiency (turnover frequency) for ammonia synthesis than other transition metals used in highly active catalysts. Thermodynamic and vibrational spectroscopic analyses implied that the rate-determining step of ammonia synthesis on the iron catalyst is not N 2 cleavage, but the formation of subsequent N-Hn species such as NH, NH 2 and NH 3 , because of the facile cleavage of N 2 .

Ammonia production

Cleavage (geology)

10.21203/rs.3.rs-1426351/v2

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Ammonia : catalysis and manufacture

Springer eBooks (1995)

研一秋鹿 Anders Nielsen

Ammonia production

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Citations (105)

Ammonia-treated activated carbon as support of Ru-Ba catalyst for ammonia synthesis

Reaction Kinetics and Catalysis Letters (2004)

Changhai Liang Zhaobin Wei Qin Xin Can Li

Molar ratio

Ammonia production

Carbon fibers

10.1023/b:reac.0000037374.92480.f1

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Remoulding of ammonia cooler liquid level controlling system in 300 kt/a synthetic ammonia plant

Science and Technology of Lcic (2000)

Zhuoli Zhang

The liquid level controlling system of ammonia cooler could not simultaneouly satisfy two production modes of the cold ammonia and the heat ammonia in the operation of synthetic ammonia plant.An auxiliary reacting regulator was added in the internal configuration.The results of application showed that the improved controlling system could be regulated stably in two production modes and could satisfy the needs of production process.

Ammonia production

Liquid ammonia

Production rate

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Selection on FeO-based Ammonia Catalyst for Small and Medium-sized Ammonia Converter

M-sized Nitrogenous Fertilizer Progress (2006)

Xu Bo

The problems in selection and application of ammonia catalyst employed in Small Medium-sized ammonia plant are introduced.The performance and ability of FeO-based ammonia catalyst are analyzed,followed by some suggestions for ammonia catalyst selection and application.

Ammonia production

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Fast Determination of Catalyst Active Coefficient in A Continuoud Ammonia Synthesis Reactor

Journal of Nanchang University (2004)

Jiang Bo-quan

Taking the typical three-tube co-current ammonia synthesis reactor in a middle-size ammonia synthesis plant of our country as an example, the mathematical models of the reactor were employed to simulate the reactor operation calculation. The calculated sensitive parameters of inlet temperature, outlet temperature, inlet vacant velocity and outlet ammonia molar fraction of the catalyst bed and the daily ammonia output can be compared with those measured in industrial production to simply and quickly determine the catalyst active (coefficients) during different production periods,which has an important significance to instruct industrial (ammonia) production and ammonia synthesis reactor design.

Ammonia production

Molar ratio

Fraction (chemistry)

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Mechanochemistry for ammonia synthesis under mild conditions

Nature Nanotechnology (2020)

Gao‐Feng Han Feng Li Zhiwen Chen Claude Coppex Seok‐Jin Kim

Ammonia production

Mechanochemistry

Bar (unit)