Advances in reforming and partial oxidation of hydrocarbons for hydrogen production and fuel cell applications

Sengodan, Sivaprakash; Lan, Rong; Humphreys, John; Du, Dongwei; Xu, Wei; Wang, Huanting; Tao, Shanwen

doi:10.1016/j.rser.2017.09.071

Cited by 349 publications

(151 citation statements)

References 265 publications

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“…Currently, the primary techniques used in industry to produce synthesis gas from methane are steam reforming [7,8], autothermal reforming [9], and partial oxidation [7]. Steam reforming of methane remains the main commercial process for the production of synthesis gas [7,8].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Chen

Song

2018

Processes

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This paper addresses the issues related to the favorable operating conditions for the small-scale production of synthesis gas from the catalytic partial oxidation of methane over rhodium. Numerical simulations were performed by means of computational fluid dynamics to explore the key factors influencing the yield of synthesis gas. The effect of mixture composition, pressure, preheating temperature, and reactor dimension was evaluated to identify conditions that favor a high yield of synthesis gas. The relative importance of heterogeneous and homogenous reaction pathways in determining the distribution of reaction products was investigated. The results indicated that there is competition between the partial and total oxidation reactions occurring in the system, which is responsible for the distribution of reaction products. The contribution of heterogeneous and homogeneous reaction pathways depends upon process conditions. The temperature and pressure play an important role in determining the fuel conversion and the synthesis gas yield. Undesired homogeneous reactions are favored in large reactors, and at high temperatures and pressures, whereas desired heterogeneous reactions are favored in small reactors, and at low temperatures and pressures. At atmospheric pressure, the selectivity to synthesis gas is higher than 98% at preheating temperatures above 900 K when oxygen is used as the oxidant. At pressures below 1.0 MPa, alteration of the dimension in the range of 0.3 and 1.5 mm does not result in significant difference in reactor performance, if made at constant inlet flow velocities. Air shows great promise as the oxidant, especially at industrially relevant pressure 3.0 MPa, thereby effectively inhibiting the initiation of undesired homogeneous reactions.

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Section: Introductionmentioning

confidence: 99%

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Chen

Song

2018

Processes

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“…Such a high H 2 selectivity is found to be superior to that of most of reforming catalysts. [10,11,14] The reason of the rising S H2 is usually considered as the contribution of the increasing amount of NiO in reforming catalysts. [19] Then, what is the effect of the increasing amount of La on the catalysis?…”

Section: Figure 2amentioning

confidence: 99%

Key Role of Lanthanum Oxychloride: Promotional Effects of Lanthanum in NiLaO_y/NaCl for Hydrogen Production from Ethyl Acetate and Water

Xue

Shen

et al. 2018

Small

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The hydrogen economy is accelerating technological evolutions toward highly efficient hydrogen production. In this work, the catalytic performance of NiO/NaCl for hydrogen production via autothermal reforming of ethyl acetate and water is further improved through lanthanum modification, and the resulted 3%-NiLaO /NaCl catalyst achieves as high as 93% H selectivity and long-term stability at 600 °C. The promoting effect is caused by the strong interactions between lanthanum and NiO/NaCl, by which LaNiO and a novel LaOCl phase are formed. The key role of LaOCl in promoting low-temperature hydrogen production is highlighted, while effects of LaNiO are well known. The LaOCl (010) facet possesses high adsorption capacity toward co-chemisorbing ethyl acetate and water. LaOCl strongly interacts with ethyl acetate and H O in the form of hydrogen bonding and coordination effect. The interactions induce tensions inside ethyl acetate and H O, activate the molecules, and hence decrease the energy barrier for reaction. In situ Fourier transform infrared spectroscopy (FTIR) reveals that LaOCl along with NaCl enhances the adsorption ability of NiO/NaCl. Moreover, LaOCl improves the dispersion of Ni species in NiO-LaNiO -LaOCl nanosheets, which possess abundant active sites. The effects together promote hydrogen evolution. Furthermore, the NiLaO /NaCl catalyst can be easily reborn after deactivation due to the water solubility of NaCl.

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“…Moreover, H 2 has been reported to have high energy yield (about 122 kJ/kg) making it better than fossil fuel. 10 As a result of this, several technological routes such as coal and biomass gasification, 11 hydrocarbon reforming, 12 thermochemical water splitting, 13 photo-electrolysis, 14 and biomass pyrolysis 15 have been employed to achieve the possibility of producing H 2 in abundance and make it readily available. Due to its importance and applications in industrial processes, H 2 has been adjudged as the energy of the future.…”

Section: Introductionmentioning

confidence: 99%

Experimental and optimization studies of hydrogen production by steam methane reforming over lanthanum strontium cobalt ferrite supported Ni catalyst

et al. 2019

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Summary Over the years, research focused has been on the development of active and stable catalysts for hydrogen (H2) production by steam methane reforming (SMR). However, there is less attention on the individual and interaction effect of key process parameters that influence the catalytic performance of such catalysts and how to optimize them. The main objective of this study is to investigate the individual and interaction effects of key parameters such as methane partial pressure ( PCH4true) (10‐30 kPa), steam partial pressure ( PH2normalO()gtrue) (10‐30 kPa), and reaction temperature (T) (750‐850°C) on H2 yield and methane (CH4) conversion during SMR using Box‐Behnken experimental design (BBD) and response surface methodology. The H2 production was catalyzed using Ni/LSCF prepared by wet impregnation method. The evaluation of the Ni/LSCF using different instrument techniques revealed that the catalyst exhibited excellent physicochemical properties suitable for SMR. Response surface models showing the individual and interaction effect of each of the parameters on the H2 yield and CH4 conversion were obtained using the set of data obtained from the BBD matrix. The three parameters were found to have significant effects on the H2 yield and CH4 conversion. At the highest desirability of 0.8994, maximum H2 yield and CH4 conversion of 89.77% and 89.01%, respectively, were obtained at optimum conditions of 30 kPa, 28.86 kPa, and 850°C for PCH4, PH2normalO()g, and temperature, respectively. The predicted values of the responses from the response surface models were found to be in good agreement with the experimental values. At optimum conditions, the catalyst was found to be stable up to 390 minutes with time on stream. The characterization of the used catalyst using thermogravimetric analysis, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, and transmission electron microscopy showed some evidence deposition of a small amount of carbon on the catalyst surface.

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Advances in reforming and partial oxidation of hydrocarbons for hydrogen production and fuel cell applications

Cited by 349 publications

References 265 publications

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Key Role of Lanthanum Oxychloride: Promotional Effects of Lanthanum in NiLaO_y/NaCl for Hydrogen Production from Ethyl Acetate and Water

Experimental and optimization studies of hydrogen production by steam methane reforming over lanthanum strontium cobalt ferrite supported Ni catalyst

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Advances in reforming and partial oxidation of hydrocarbons for hydrogen production and fuel cell applications

Cited by 349 publications

References 265 publications

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Key Role of Lanthanum Oxychloride: Promotional Effects of Lanthanum in NiLaOy/NaCl for Hydrogen Production from Ethyl Acetate and Water

Experimental and optimization studies of hydrogen production by steam methane reforming over lanthanum strontium cobalt ferrite supported Ni catalyst

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Key Role of Lanthanum Oxychloride: Promotional Effects of Lanthanum in NiLaO_y/NaCl for Hydrogen Production from Ethyl Acetate and Water