Kinetic evaluation of the tri-reforming process of methane for syngas production

Maciel, Leonardo José Lins; Souza, Aleksándros El Áurens Meira de; Cavalcanti-Filho, Valdério O.; Knoechelmann, Augusto; Abreu, César Augusto Moraes de

doi:10.1007/s11144-010-0232-9

Cited by 20 publications

(21 citation statements)

References 9 publications

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“…The inlet NG stream is assumed to be purified; the FLUEGAS stream contains 8% CO 2 , 20% H 2 O, 2% O 2 , and 70% N 2 by mole, based on the typical flue gas composition of an NG‐fired power plant . The reaction temperature was chosen as 1,123 K, at which a 96% conversion was reported using Ni‐γAl 2 O 3 catalyst . Due to the complexity and lack of kinetic data, the RGIBBS reactor model is used for the TR reformer.…”

Section: Process Simulationmentioning

confidence: 99%

“…36 The reaction temperature was chosen as 1,123 K, at which a 96% conversion was reported using Ni-γAl 2 O 3 catalyst. 34 Due to the complexity and lack of kinetic data, the RGIBBS reactor model is used for the TR reformer. This model calculates equilibrium concentration based on the minimization of Gibbs free energy.…”

Section: Tri-reformingmentioning

confidence: 99%

“…Previous research efforts have been focused on the activity and stability of catalysts used in TR . For example, using the Ni‐based catalysts in a fixed‐bed reactor, the methane conversion in TR could achieve over 90% for 10 hr at 950 °C and atmospheric pressure .…”

Section: Process Simulationmentioning

confidence: 99%

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Sustainability assessment of combined steam and dry reforming versus tri‐reforming of methane for syngas production

Chen

Gangadharan

Lou

2018

Asia-Pacific J Chem Eng

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Synthesis gas (syngas) is a versatile intermediate in the production of valuable chemicals and fuel, such as methanol, dimethyl ether, ethylene, propylene, and the Fischer–Tropsch fuel. Combining steam reforming and dry reforming (SR + DR) routes can produce syngas with a suitable H2:CO molar ratio (around 2:1) for Fischer–Tropsch synthesis. The newly proposed tri‐reforming (TR) route at experimental scale was a capable alternative to produce syngas in a single reformer with potential benefits such as energy savings and waste flue gas utilization. In this paper, sustainability assessment of SR + DR and TR routes adopting quantifiable indices in economic, environmental, and safety dimensions at industrial scale is performed based on process simulation models. Results show that TR route outperforms SR + DR route in all 3 dimensions. Sensitivity analysis of natural gas price fluctuation does not alter the conclusion. A sustainable root cause analysis is also applied on the SR + DR which identifies root causes affecting its sustainability with the aid of visualization tools such as Pareto chart and fish bone diagram.

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Section: Process Simulationmentioning

confidence: 99%

Section: Tri-reformingmentioning

confidence: 99%

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Sustainability assessment of combined steam and dry reforming versus tri‐reforming of methane for syngas production

Chen

Gangadharan

Lou

2018

Asia-Pacific J Chem Eng

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“…The combined steam and carbon dioxide reforming of CH 4 (CSCR) has recently attracted a lot of attention as an alternative economic utilization way of CO 2 with the production of synthesis gas, which is generally contained in natural gas or stranded gas [1,2]. Even though carbon dioxide reforming with methane (CDR) could be the best way to utilize the green house gas CO 2 directly, its industrial application is restricted because of severe coke formation.…”

Section: Introductionmentioning

confidence: 99%

“…The site density [defined as the amount of adsorbed CO 2 (mmol/g) divided by surface area (m 2 /g) of fresh CSCR catalysts] for CO2 …”

mentioning

confidence: 99%

The role of CeO2–ZrO2 distribution on the Ni/MgAl2O4 catalyst during the combined steam and CO2 reforming of methane

Bae

Kim

Baek

et al. 2011

Reac Kinet Mech Cat

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The effect of the distribution of CeO 2 -ZrO 2 on Ni/MgAl 2 O 4 catalyst on the catalytic performance during the combined steam and carbon dioxide reforming of CH 4 (CSCR) was investigated on two different catalysts prepared using a sequential impregnation and co-precipitation of Ni and CeO 2 -ZrO 2 components. The CeO 2 -ZrO 2 plays an important role in the CO 2 conversion by enhancing a facile activation of CO 2 with an adjacent contact with nickel crystallites. The CSCR catalysts prepared by the co-precipitation of nickel and CeO 2 -ZrO 2 on MgAl 2 O 4 support shows a catalytic activity superior to the catalyst prepared by sequential impregnation of nickel on the MgAl 2 O 4 support with CeO 2 -ZrO 2 due to the homogeneous distribution of CeO 2 -ZrO 2 with the formation of small nickel crystallites and a large amount of active sites for CO 2 adsorption.

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Hydrogen Production From Biogas Reforming: An Overview of Steam Reforming, Dry Reforming, Dual Reforming, and Tri-Reforming of Methane

Minh

Siang

et al. 2018

Hydrogen Supply Chains

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Nowadays, around 96% of hydrogen is produced from fossil resources, and particularly from natural gas, oil and derivatives, and coal. Chemicals synthesized from these fossil resources are usually obtained via synthetic gas, which is produced by steam reforming of natural gas. Details about steam reforming will be discussed later. Scheme 4.1 below illustrates the most common products that can be obtained from syngas, including hydrogen, methanol, liquid fuels, synthetic natural gas (SNG), ammonia, and heat and power.Hydrogen from water electrolysis accounts only for about 4% of total hydrogen production. Naturally, water electrolysis using electricity from renewable resources, such as solar, wind, or hydro is a promising way for green hydrogen production. However, the process still needs to be improved in order to reach the competitive cost required by the hydrogen market.Another way to produce green hydrogen is the valorization of bioresources, such as biogas. This last one is obtained from biomass, residues, or wastes by anaerobic digestion. In general, two types of biogas are distinguished:(1) digested gas from anaerobic digester, which is commonly called biogas, and (2) landfill gas from landfill sites (IEA, 2009). The production of hydrogen from biogas and landfill gas can be achieved via a syngas route as shown in Scheme 4.2 below. Syngas is obtained from biogas or landfill gas by different reforming processes, which will be detailed later. Then a mixture of H 2 and CO 2 can be obtained from syngas by the watergas-shift (WGS) reaction. Finally, hydrogen can be separated from the mixture with CO 2 by using a pressure swing adsorption (PSA) or an equivalent process.Both biogas/landfill gas reforming and WGS are catalytic processes. The reforming step can be achieved with catalytic steam reforming process, which is already commercialized for natural gas. However, the energy balance of the steam reforming is not optimized because of a large excess of water vapor, which is required with current catalysts. Because the composition of Natural gas Oil and derivatives Charcoal Stem reforming Syngas •Hydrogen •Methanol •Liquid fuels by Fisher-Tropsch •Synthetic natural gas •Ammonia •Heat and power •Energy in chemical looping SCHEME 4.1 Chemicals and energy from fossil resources via steam reforming. Biomass Residus Wastes Bio-degradation Biogas Landfill gas Reforming Syngas WGSR H 2 , CO 2 H 2 PSASCHEME 4.2 Main steps for the production of hydrogen from biogas or landfill gas via syngas route. Adapted from IEA, 2009. IEA bioenergy, Task 37-Energy from biogas and landfill gas.(4.1) Dry reforming of methane (DRM); (4.2) Boudouard reaction; (4.3) water-gas-shift (WGS) reaction; (4.4) methane cracking; (4.5) steam reforming of methane; (4.6) steam reforming of carbon; (4.7) partial oxidation of methane; (4.8) methane combustion; (4.9) partial oxidation of carbon; (4.10) carbon combustion; and (4.11) Methane reforming with large excess of steam. All molecules are in the gas state except carbon (C), which is in the solid state.

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Kinetic evaluation of the tri-reforming process of methane for syngas production

Cited by 20 publications

References 9 publications

Sustainability assessment of combined steam and dry reforming versus tri‐reforming of methane for syngas production

Sustainability assessment of combined steam and dry reforming versus tri‐reforming of methane for syngas production

The role of CeO2–ZrO2 distribution on the Ni/MgAl2O4 catalyst during the combined steam and CO2 reforming of methane

Hydrogen Production From Biogas Reforming: An Overview of Steam Reforming, Dry Reforming, Dual Reforming, and Tri-Reforming of Methane

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