Nickel-based tri-reforming catalyst for the production of synthesis gas

Kang, Jung Shik; Kim, Dae Hyun; Lee, Sang Deuk; Hong, Suk In; Moon, Dong Ju

doi:10.1016/j.apcata.2007.08.017

Cited by 84 publications

(29 citation statements)

References 14 publications

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“…Molecular hydrogen is an ecofriendly fuel which can be converted to electricity efficiently via fuel cells with zero emissions of greenhouse gases or hazardous species such as volatile organic compounds [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production by Catalytic Reforming of Gaseous Hydrocarbons (Methane & LPG)

Moon

2008

Catal Surv Asia

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Hydrogen has been attracting great interest as a major energy source in near future. The lack of an infrastructure has led to a research effort to develop fuel processing technology for production of hydrogen. In this review, we are reporting the catalytic reforming of gaseous hydrocarbons carried out in our research group, covering dry-reforming of CH 4 , tri-reforming of CH 4 , the electrocatalytic reforming of CH 4 by CO 2 in the SOFC (solid oxide fuel cell) system and steam reforming of LPG. Especially, we have focused on our work, though the related work from other researchers is also discussed wherever necessary. It was found that tri-reforming of CH 4 over NiO-YSZ-CeO 2 catalyst was more desirable than dry-reforming of CH 4 due to higher reforming activity and less carbon formation. The synthesis gas produced by trireforming of CH 4 can be used for the production of dimethyl ether, Fischer-Tropsch synthesis fuels and high valued chemicals. To improve the problem of deactivation of catalyst due to carbon formation in the dry reforming of CH 4, the internal reforming of CH 4 by CO 2 in SOFC system with NiO-YSZ-CeO 2 anode catalyst was suggested for cogeneration of a syngas and electricity. It was found that Rh-spc-Ni/MgAl catalyst showed long term stability for 1,100 h in the steam reforming of LPG under the tested conditions. The addition of Rh to spc-Ni/MgAl catalyst restricted the deactivation of catalyst due to carbon formation in the steam reforming of LPG and diesel under the tested conditions. The result suggested that the developed reforming catalysts can be used in the reforming process of CH 4 , LNG and LPG for application to hydrogen station and fuel processor system.

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Section: Introductionmentioning

confidence: 99%

Hydrogen Production by Catalytic Reforming of Gaseous Hydrocarbons (Methane & LPG)

Moon

2008

Catal Surv Asia

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“…In order to implement in practice the tri-reforming layout more complicated technical solutions are required, one of the main issues is selection of catalysts, determination of their resource and conditions of reactions [31][32][33][34][35][36]. Available published data, summarized partially in Table 2, show the following activity sequence of catalysts:…”

Section: Theoretical Backgrounds Of Thermochemical Recoverymentioning

confidence: 99%

“…Herewith, SG is generated in the composition of mixed fuel, which is further used directly in engine operating cycle. This type of conversion is referred to as tri-reforming [31][32][33][34][35][36]. Since typical composition of EG contains low amount of oxygen (ÑÎ 2 = 9-10 %, Í 2 Î = 18-20 %, Î 2 = 2-3 %, remainder -N 2 ), then the EG heat and heat generated upon oxidation of initial fuel by remaining oxygen can be insufficient for endothermic reaction of steam and carbon dioxide conversion of fuel.…”

Section: Theoretical Backgrounds Of Thermochemical Recoverymentioning

confidence: 99%

“…As applied to this case, upon tri-reforming the following chemical reactions are possible [31][32][33][34][35][36] ... (13) The reactions (9) - (10) are endothermic and the reactions (12) -(13) are exothermic.…”

Section: Thermodynamic Analysis Efficiency Internal Tcrmentioning

confidence: 99%

“…The main issue, mentioned by all researchers, is related with propensity of nickel catalysts to coking, which restricts duration of the experiments. In order to decrease coking the systems are used with addition of lanthanum, [32][33][34][35][36].…”

Section: Theoretical Backgrounds Of Thermochemical Recoverymentioning

confidence: 99%

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Thermochemical Heat Recovery Based on External Heat Engine

Кириллов¹,

Samoilov²,

Шигаров³

et al. 2015

Biosci., Biotech. Res. Asia

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This work discusses the issues of thermochemical recovery as a method to improve efficiency of fuel utilization in external heat engines (EHE).Key words: Catalyst, Synthesis gas, Thermochemical recovery, External heat engine, mathematical model.Practical application of thermodynamic cycles of thermal machines is related with implementation of heat transfer from heating source to working fluid (WF) or heat withdrawal from it after working cycle. With regard to thermal engines, conversion of chemical energy of fuel into work is implemented in two stages: at the first stage energy is converted into heat, and at the second stage the obtained heat is converted into work. In this relation intensification of heat transfer is one of the conditions of improvement of the observed efficiency of thermodynamic cycles of thermal machines. Theoretical efficiency of reversible thermodynamic cycle is determined by the ratio of difference between average maximum temperature and average minimum temperature of heat withdrawal and does not exceed the efficiency of the Carnot cycle. Increase in the average maximum temperature is limited with thermal resistance of materials and increase with heat losses of engine into external environment. In this regard selection of WF for EHE is highly important. Decrease in average temperature of heat withdrawal is limited with environmental and engineering considerations. Due to existence of such limitations the only way to increase overall efficiency of engine is related with heat recovery of exhaust gases (EG) by means of TCR either of cogeneration.It 3027-3039 (2015) with EG into environment equals to 35 %; heat transferred to cooling system: 30 %; portion of losses due to incomplete fuel combustion: about 2 %, and unaccounted heat losses reach 3 %. Theoretically, it is possible to recover heat losses related with heat withdrawal into environment and into cooling system, and thus to achieve increase in thermal efficiency. The essence of TCR is that a portion of EG heat and heat, transferred into engine cooling system, is used for endothermic conversion of initial fuel into another type of fuel possessing higher enthalpy of products. Due to this there is an increase in total efficiency of fuel utilization [2][3][4]. In terms of energy the most profitable solution is conversion of fuels into SG, which is a mixture of CO and Í 2 . The first scientific background of this method to improve EHE efficiency was given by Nosach [5], who specified it as TCR, and its practical implementation was applied to stationary solid fuel facilities.The use of TCR makes it possible to achieve two important purposes simultaneously: 1) to increase the lower heating value of reformates with regard to initial fuel. Theoretical maximum increase can reach 20-22 % upon steam reforming of propane to CO and H 2 (without ÑÎ 2 and especially of ÑÍ 4 in the composition) [2]. 2) to increase stability of catalytic burning in nonadiabatic operation mode of catalytic burner (due to heat withdrawal into engine or just heat losse...

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tri‐reforming process

Cornils¹

2020

Catalysis From a to Z

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Nickel-based tri-reforming catalyst for the production of synthesis gas

Cited by 84 publications

References 14 publications

Hydrogen Production by Catalytic Reforming of Gaseous Hydrocarbons (Methane & LPG)

Hydrogen Production by Catalytic Reforming of Gaseous Hydrocarbons (Methane & LPG)

Thermochemical Heat Recovery Based on External Heat Engine

tri‐reforming process

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