Catalytic partial oxidation of natural gas at elevated pressure and low residence time

Basini, L.; Aasberg‐Petersen, Kim; Guarinoni, Alessandra; Østberg, Martin

doi:10.1016/s0920-5861(00)00504-6

Cited by 103 publications

(49 citation statements)

References 29 publications

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“…Before 1992 most studies were carried out at moderate or low space velocities at a residence time of 1s or above [14]. However, later CPO has been carried out at least in the laboratory at very short contact times between 0.1 and 10 ms in some cases without preheating the feedstock and with no steam addition.…”

Section: Catalytic Systems For Cpo Reactionmentioning

confidence: 99%

Recent Developments in the Partial Oxidation of Methane to Syngas

Al-Sayari¹

2013

TOCATJ

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Natural gas is catalytically converted into several bulk chemicals such as ammonia, methanol, dimethyl ether, and synthetic liquid fuels by Fischer-Tropsch synthesis and similar processes. The main step in the conversion of natural gas to these products is the production of synthesis gas with the desired composition ranging from H 2 /CO = 3:1 used for the production of ammonia to the 1:1 mixture preferred for production of dimethyl ether. Catalysts and catalytic processes are important in the production of synthesis gas from natural gas. In this work, relevant catalytic systems employed recently in the production of syngas by the catalytic partial oxidation of methane, as well as experimental evidences on the reaction mechanisms are examined. Differences in methane dissociation, binding site preferences, stability of OH surface species, surface residence times of active species and contributions from lattice oxygen atoms and support species are considered. The methane dissociation requires reduced metal sites, but at elevated temperatures oxides of active species may be reduced by direct interaction with methane or from the reaction with H 2 and CO (or C). The comparison of elementary reaction steps on Pt and Rh illustrates the fact that a key factor to produce hydrogen as primary product is a high activation energy barrier to the formation of OH. Another essential property for the formation of H 2 and CO as primary products is a low surface coverage of intermediates, such that the probability of O-H, OH-H and CO-O interactions is reduced.

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Section: Catalytic Systems For Cpo Reactionmentioning

confidence: 99%

Recent Developments in the Partial Oxidation of Methane to Syngas

Al-Sayari¹

2013

TOCATJ

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“…Few data are available in the literature dealing with high pressure CPO tests, [8,[22][23][24] but this is a critical element for experimentation and safety analysis, due to the more severe conditions related to the flammability properties of the gaseous reactant mixtures.…”

Section: Resultsmentioning

confidence: 99%

“…[6][7][8] In terms of resource and energy efficiency, as well as of environmental impact, Bonneau [3] reported (in the case of syngas production to produce methanol) that CPO, with respect to ATR, partial oxidation (POX) and SR, allows reducing methane consumption (from 32 GJ per tonne of MeOH for SR to 20-30 for CPO), oxygen consumption (from 530 m 3 /t-MeOH to 270-300 for CPO) and CO 2 emissions [from 380 10 3 tpy (tonne per year) for SR to 250-270 for CPO]. CPO, particularly for small-and medium-scale processes, allows thus to significantly improve resource and energy efficiency of the process, as well as the environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Partial Oxidation Coupled with Membrane Purification to Improve Resource and Energy Efficiency in Syngas Production

Iaquaniello¹,

Salladini

Palo³

et al. 2015

ChemSusChem

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Catalytic partial oxidation coupled with membrane purification is a new process scheme to improve resource and energy efficiency in a well-established and large scale-process like syngas production. Experimentation in a semi industrial-scale unit (20 Nm(3) h(-1) production) shows that a novel syngas production scheme based on a pre-reforming stage followed by a membrane for hydrogen separation, a catalytic partial oxidation step, and a further step of syngas purification by membrane allows the oxygen-to-carbon ratio to be decreased while maintaining levels of feed conversion. For a total feed conversion of 40 %, for example, the integrated novel architecture reduces oxygen consumption by over 50 %, with thus a corresponding improvement in resource efficiency and an improved energy efficiency and economics, these factors largely depending on the air separation stage used to produce pure oxygen.

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“…또한, 수증기 개질로 생성되는 수소는 무공해 청 정 연료로서 수소자동차 및 연료전지 등에 적용할 수 있다. 수소생산 방법으로 부분 산화법, 자연 개질 법 및 수증기 개질법 등이 많이 사용 되며, 특히 수증 기 개질법은 버너로 주입되는 고온의 열을 이용한 흡열반응에 의해 수소를 생성하는 방법으로서 다른 개질방법에 비해 수소 생산량이 많고 경제성이 우수 하다 [6][7][8][9].…”

Section: 서 론unclassified

Characteristics of Temperature in Reformer Tube and Chemical Reaction for Steam Methane Ratio

Han¹,

Kim²,

Lee³

2016

Journal of the Korean Institute of Gas

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-The aim of numerical study is the investigation of the solid and fluid temperatures in a reformer tube and chemical reaction characteristics of different steam-carbon ratio. We considered conjugate heat transfer contain radiation, convection and conductive heat transfers. This is because steam reforming reaction of hydrocarbon occurred high temperature conditions up to 800 K-1000 K by using commercial computational fluid dynamics (CFD) code (Fluent ver. 13.0). For numerical simulation, the Reynolds-Averaged Navier-Stokes, momentum and energy equation were employed. In addition, inside of reformer tube is assumed as the porous medium to consider the Nichrome-based catalyst. To analysis characteristics of tube temperature in chemical reaction, we changed steam-methane ratio(SCR) from 1 to 6. As increased SCR, the higher tube temperature and methane conversion were observed. It was obtained that the highest hydrogen production held in SCR of 5.

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Catalytic partial oxidation of natural gas at elevated pressure and low residence time

Cited by 103 publications

References 29 publications

Recent Developments in the Partial Oxidation of Methane to Syngas

Recent Developments in the Partial Oxidation of Methane to Syngas

Catalytic Partial Oxidation Coupled with Membrane Purification to Improve Resource and Energy Efficiency in Syngas Production

Characteristics of Temperature in Reformer Tube and Chemical Reaction for Steam Methane Ratio

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