Dielectric barrier discharge plasma catalysis as an alternative approach for the synthesis of ammonia: a review

Hosseini, Hamideh

doi:10.1039/d3ra05580a

Cited by 8 publications

(2 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Haber-Bosch (H-B) process using an iron-based catalyst is the current method of industrial ammonia synthesis. This reaction requires high temperatures (500 • C) and high pressures (200 bar) to proceed [4]. However, the H-B process is responsible for consuming 1-2% of the world's total energy and contributes to 1.6% of global CO 2 emissions [5].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Noble Gas Addition for Plasma Synthesis of Ammonia in a Dielectric Barrier Discharge Reactor

Xu,

Yuan,

Wang

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

Non-thermal plasma driven ammonia synthesis has great potential for future industrial applications due to its low theoretical energy requirements. To achieve technological advancement and environmental sustainability, it is crucial to boost the energy yield in plasma-assisted ammonia synthesis. Therefore, optimizing energy transfer and utilization are key strategies for enhancing energy efficiency. In this study, dielectric barrier discharge driven by a nanosecond pulsed power supply is used to enhance plasma-assisted ammonia synthesis by controlling the energy transfer through the addition of noble gases. It was found that the addition of noble gases changed the plasma characteristics, significantly improved the uniformity of the discharge, and achieved a high energy yield for ammonia synthesis. The effects of additive amounts of argon (Ar) and helium (He), as well as the pulse parameters including the pulse voltage, pulse repetition frequency, pulse width, and pulse rise time on the energy yield of ammonia synthesis are discussed. The inclusion of noble gases expanded the pathway for gas-phase reactions, with the active components of critical reactions examined through optical emission spectra. This analysis revealed an increased presence of both N2+ and N2* particles in the reaction’s rate-limiting step, attributed to the addition of noble gases. Finally, a zero-dimensional (0D) plasma chemical kinetic model was established to investigate the influence of Ar addition on the reaction mechanism of ammonia synthesis.

show abstract

Section: Introductionmentioning

confidence: 99%

Effectiveness of Noble Gas Addition for Plasma Synthesis of Ammonia in a Dielectric Barrier Discharge Reactor

Xu,

Yuan,

Wang

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…They suggested an interfacial nature of the P/L reactions, where the plasma-generated atomic nitrogen abstracted hydrogen from surface water to obtain NH, which reacts with H 2 O or H to form NH 3 ; this was consistent with the enhanced NH 3 yield under ultraviolet irradiation of water to provide more hydrogen radicals. Following that, P/L reactions have attracted extensive investigations for NF by using different types of plasma reactor configurations such as dielectric barrier discharge (DBD), 11,12 plasma jet in contact with liquid water surface, 13 gliding arc discharge, 14 combined plasma reactor system, 15 which has lately been reviewed. 16 In a typical P/L system, the liquid water can provide both hydrogen and oxygen sources, which complicates the reactions and often leads to mixed NF products, including NH 3 as well as NO 2 − and NO 3 − in the aqueous solutions.…”

Section: ■ Introductionmentioning

confidence: 99%

Selective Nitrate Synthesis by Plasma/Liquid Water Reaction: An Enhanced Oxidative Strength Mechanism in Nitrogen Discharge

Tang,

Dai,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Plasma/liquid (P/L) reaction is an emerging green chemical process for nitrogen fixation into ammonia or nitrogen oxides directly from air and water. On the other hand, the P/L synthesis is often limited by product nonselectivity. Mechanistic understanding is essential to achieve selective nitrate synthesis in P/L reactions, which would also be profitable in practice. In this study, selective NO 3 − synthesis from nitrogen gas and liquid water was achieved via a cold microwave plasma (CMP) at ambient temperature and pressure. The product yield and selectivity were found to be controlled by tuning the types of discharge gases as well as the treatment time. The results demonstrate that NO 3 − was exclusively produced in nitrogen discharge at an extended treatment time of 20 min. Various spectroscopy characterizations and reactive nitrogen or oxygen species measurements were conducted to understand the underlying mechanism. In the nitrogen plasma, the abundant metastable N 2 (A) species were suggested to be responsible for the ample hydroxyl radicals generated from water, which in turn plays a key role for the high NO 3 − selectivity. The results in this work not only give insight into the nitrogen fixation process in plasma and liquid water systems but also have a more general relevance to the understanding of P/L based chemical transformation.

show abstract

Ni‐MOF‐74 Derived Carbon‐Based Ni Catalysts for Efficient Catalytic Ammonia Synthesis via Pulsed DBD Plasma

Song,

Yin,

Zhang

2024

Plasma Processes & Polymers

View full text Add to dashboard Cite

Designing efficient noble metal‐free catalysts for plasma‐catalytic ammonia synthesis is significant and challenging. Carbon‐based metal catalysts were prepared at different pyrolysis temperatures using the Ni‐MOF‐74 precursor. The effects of Ni‐MOF‐74 and its derived carbon‐based metal catalysts on pulsed dielectric barrier discharge (DBD) plasma ammonia synthesis were investigated. The results showed that Ni‐MOF‐74‐300 with both the MOF structure and nickel metal particles exhibited the best catalytic performance for ammonia synthesis. The ammonia synthesis rate reached 41.38 mmol g−1 h−1, whereas the nitrogen conversion rate was as high as 1.54% with an energy yield of 3.04 g kWh−1. Compared to the situation of plasma only, the ammonia synthesis rate, nitrogen conversion rate, and energy yield were increased by 28.46 times, 5.7 times, and 5.5 times, respectively.

show abstract

Dielectric barrier discharge plasma catalysis as an alternative approach for the synthesis of ammonia: a review

Abstract: We discuss the synthesis of ammonia over catalysts using dielectric barrier discharge plasma as a promising alternative approach.

Cited by 8 publications

References 108 publications

Effectiveness of Noble Gas Addition for Plasma Synthesis of Ammonia in a Dielectric Barrier Discharge Reactor

Effectiveness of Noble Gas Addition for Plasma Synthesis of Ammonia in a Dielectric Barrier Discharge Reactor

Selective Nitrate Synthesis by Plasma/Liquid Water Reaction: An Enhanced Oxidative Strength Mechanism in Nitrogen Discharge

Ni‐MOF‐74 Derived Carbon‐Based Ni Catalysts for Efficient Catalytic Ammonia Synthesis via Pulsed DBD Plasma

Contact Info

Product

Resources

About