Kinetic assessment of H2 production from NH3 decomposition over CoCeAlO catalyst in a microreactor: Experiments and CFD modelling

2021 ◽  
Vol 411 ◽  
pp. 128595
Author(s):  
Hesam Maleki ◽  
Matt Fulton ◽  
Volfango Bertola
Keyword(s):  
H2 Production ◽  
Cfd Modelling ◽  
Nh3 Decomposition ◽  
Kinetic Assessment

scholarly journals Highly Dispersed Co Nanoparticles Prepared by an Improved Method for Plasma-Driven NH3 Decomposition to Produce H2

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 107 ◽  
Author(s):  
Li Wang ◽  
YanHui Yi ◽  
HongChen Guo ◽  
XiaoMin Du ◽  
Bin Zhu ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Active Sites ◽  
Freeze Drying ◽  
Preparation Method ◽  
H2 Production ◽  
Improved Method ◽  
Highly Dispersed ◽  
Nh3 Decomposition ◽  
Study Techniques ◽  
Fumed Sio2

Previous studies reveal that combining non-thermal plasma with cheap metal catalysts achieved a significant synergy of enhancing performance of NH3 decomposition, and this synergy strongly depended on the properties of the catalyst used. In this study, techniques of vacuum-freeze drying and plasma calcination were employed to improve the conventional preparation method of catalyst, aiming to enhance the activity of plasma-catalytic NH3 decomposition. Compared with the activity of the catalyst prepared by a conventional method, the conversion of NH3 significantly increased by 47% when Co/fumed SiO2 was prepared by the improved method, and the energy efficiency of H2 production increased from 2.3 to 5.7 mol(kW·h)−1 as well. So far, the highest energy efficiency of H2 formation of 15.9 mol(kW·h)−1 was achieved on improved prepared Co/fumed SiO2 with 98.0% ammonia conversion at the optimal conditions. The improved preparation method enables cobalt species to be highly dispersed on fumed SiO2 support, which creates more active sites. Besides, interaction of Co with fumed SiO2 and acidity of the catalyst were strengthened according to results of H2-TPR and NH3-probe experiments, respectively. These results demonstrate that employing vacuum-freeze drying and plasma calcination during catalyst preparation is an effective approach to manipulate the properties of catalyst, and enables the catalyst to display high activity towards plasma-catalytic NH3 decomposition to produce H2.

Core–shell structured nanoparticles (M@SiO2, Al2O3, MgO; M=Fe, Co, Ni, Ru) and their application in COx-free H2 production via NH3 decomposition

2010 ◽  
Vol 158 (3-4) ◽  
pp. 401-408 ◽  
Author(s):  
L.H. Yao ◽  
Y.X. Li ◽  
J. Zhao ◽  
W.J. Ji ◽  
C.T. Au
Keyword(s):  
H2 Production ◽  
Core Shell ◽  
Nh3 Decomposition

Enhanced NH3 decomposition for H2 production over bimetallic M(M=Co, Fe, Cu)Ni/Al2O3

2021 ◽  
Vol 221 ◽  
pp. 106945
Author(s):  
Enkang Fu ◽  
Yu Qiu ◽  
Huaichang Lu ◽  
Sijun Wang ◽  
Lishan Liu ◽  
...  
Keyword(s):  
H2 Production ◽  
Nh3 Decomposition

FeMo-based catalysts for H2 production by NH3 decomposition

2012 ◽  
Vol 125 ◽  
pp. 409-417 ◽  
Author(s):  
Barbara Lorenzut ◽  
Tiziano Montini ◽  
Manuela Bevilacqua ◽  
Paolo Fornasiero
Keyword(s):  
H2 Production ◽  
Nh3 Decomposition

CFD MODELLING AND VALIDATION OF LOSS COEFFICIENTS FOR PENSTOCK BIFURCATIONS IN HYDROPOWER SCHEMES

2018 ◽  
Author(s):  
Kasturi Sukhapure ◽  
Alan Burns ◽  
Tariq Mahmud ◽  
Jake Spooner
Keyword(s):  
Cfd Modelling ◽  
Loss Coefficients

PERLAKUAN ETHYL METHANE SULFONATE (EMS) PADA ENTEROBACTER AEROGENES AY-2 DARI LIMBAH METAN FERMENTASI UNTUK PENINGKATAN PRODUKSI GAS HIDROGEN

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Mahyudin Abdul Rachman
Keyword(s):  
Metabolic Pathway ◽  
Acid Production ◽  
Double Mutant ◽  
Enterobacter Aerogenes ◽  
H2 Production ◽  
Hydrogen Gas ◽  
Survival Ratio ◽  
Ethyl Methane Sulfonate ◽  
Methane Sulfonate ◽  
Ethyl Methane

Enterobacter aerogenes AY-2 mutant is known for hydrogen gas producer which ws obtained from the sludge of methane fermentation and the yield is 1.5 fold higher than wildtype. Hydrogen gas production can be gain via NADH oxidation in anaerobic metabolic pathway by blocking organic acid production. Metabolic pathway can be changed by mutagenesis. Enterobacter aerogenes AY-2 mutated with ethyl methane sulfonate in logarithmic phase with consentration 10, 11, 12, 13, 14 and 15 μl/ml cell suspention during 120 minute. Mutation that result lowest survival ratio (0,01%) was 14 μl EMS/ml cell suspention is repeated with variation incubation time, 30, 60, 90 and 120 minute. 166 double mutant colony has been collected and choosen randomly. The choosen 43 colony was fermented in glycerol complex medium for determining ten double mutant with the highest H2 production. Double mutant AD-H43 is a highest H2 producer that increase 20% H2 production from AY-2 and has a decrease lactid acid production, 31% less from AY-2. Increasing H2 production in double mutant AD-H43 is caused by lactate dehydrogenase deffi cient.Keywords: Enterobacter aerogenes AY-2, ethyl methane sulfonate (EMS), H2 and methane sludge

scholarly journals CFD modelling of an animal occupied zone using an anisotropic porous medium model with velocity depended resistance parameters

2021 ◽  
Vol 181 ◽  
pp. 105950
Author(s):  
E. Moustapha Doumbia ◽  
David Janke ◽  
Qianying Yi ◽  
Thomas Amon ◽  
Martin Kriegel ◽  
...  
Keyword(s):  
Porous Medium ◽  
Cfd Modelling ◽  
Medium Model ◽  
Anisotropic Porous Medium ◽  
Porous Medium Model ◽  
Occupied Zone
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