Thermodynamic analysis of mixed and dry reforming of methane for solar thermal applications

Sun, Yanping; Ritchie, T.; Hla, San Shwe; McEvoy, Stephen R.; Stein, W.; Edwards, J. H.

doi:10.1016/s1003-9953(10)60235-6

Cited by 63 publications

(37 citation statements)

References 10 publications

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“…8) showed that the excess of CH 4 in the feed gas had a positive effect on CO 2 conversion, the negative effect on CH 4 conversion and led to higher formation of H 2 when compared to the tests with equimolar feed gas composition, which is in agreement with calculations of thermodynamic equilibrium reported in literature [48,[52][53][54][55]. On the other hand, the tests carried out in the excess of CO 2 in the feed caused a decrease in both CH 4 and CO 2 conversions.…”

Section: Samplesupporting

confidence: 81%

“…It is important to mention that the HTNi25-Ce catalyst showed the most stable performance when the excess of CO 2 was introduced to the reactor. According to thermodynamic model calculations [48,[52][53][54][55], the application of the excess of CO 2 should have a positive effect on catalyst stability, as lower formation of carbon deposits should be expected. Additionally, Ce promotion may help to oxidize deposited coke via reverse Boudouard reaction.…”

Section: Samplementioning

confidence: 99%

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Catalytic activity of hydrotalcite-derived catalysts in the dry reforming of methane: on the effect of Ce promotion and feed gas composition

Dębek

Motak

Gálvez

et al. 2017

Reac Kinet Mech Cat

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Ni/Al and Ni/Mg/Al hydrotalcite-derived materials containing various Ni loadings were synthesized and subsequently promoted with Ce-species via adsorption from [Ce(EDTA)] -complexes. The obtained materials were characterized by elemental analysis (ICP-MS), XRD, H 2 -TPR, CO 2 -TPD, TG and low temperature N 2 sorption experiments. The amount of the introduced Ce was dependent on the nickel and magnesia content in catalysts precursors, and it influenced materials properties (i.e. basicity, reducibility of Ni species) in various ways and the catalytic performance in the dry reforming of methane (DRM). The promoted catalysts showed improved performance with CH 4 and CO 2 conversions at 550°C in the range of 35-55 and 35-45%, respectively. The extent of the improvement was dependent on the nickel content and the presence of magnesia. In general, Ce promotion increased materials stability by changing of the type of carbonaceous deposits. Ce modification hindered the transformation of amorphous carbonaceous deposits to graphitic carbon. The former may be easier oxidized and contribute to syngas production. Two selected catalysts were additionally tested in DRM at elevated temperatures (650 and 750°C) and over various feed gas compositions.

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Section: Samplesupporting

confidence: 81%

Section: Samplementioning

confidence: 99%

Catalytic activity of hydrotalcite-derived catalysts in the dry reforming of methane: on the effect of Ce promotion and feed gas composition

Dębek

Motak

Gálvez

et al. 2017

Reac Kinet Mech Cat

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“…The main direction for catalyst development in this field is focused on the use of nickel as active phase, this transition metal being the most attractive candidate for largescale industrial applications due to its high reactivity in DRM and SRM [3][4][5] together with low cost and wide availability compared to noble metals (Ru, Rh, Ir) [16][17][18][19]. However, the stability of supported Ni-based catalysts under the harsh reaction conditions of CSDRM [20][21][22][23] is still an important concern. The major deactivation drawbacks are severe coke deposition, reoxidation and thermal agglomeration of the Ni 0 nanoparticles under steam and at high temperature [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Ordered mesoporous “one-pot” synthesized Ni-Mg(Ca)-Al2O3 as effective and remarkably stable catalysts for combined steam and dry reforming of methane (CSDRM)

Jabbour¹,

Massiani²,

Davidson³

et al. 2017

Applied Catalysis B: Environmental

144

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“…Based on the principle of the Gibbs free energy minimization, for any reaction system to be thermodynamically favoured, the Gibbs free energy must be at its minimum value with the change in the Gibbs free energy equals to zero at any given temperature and pressure (eq. (5)) [35,36].…”

Section: Thermodynamics Analysismentioning

confidence: 99%

Process Modelling, Thermodynamic Analysis and Optimization of Dry Reforming, Partial Oxidation and Auto-Thermal Methane Reforming for Hydrogen and Syngas production

Ayodele

Cheng

2015

Chemical Product and Process Modeling

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In this work, process modelling, thermodynamic analysis and optimization of stand-alone dry and partial oxidation reforming of methane as well as, the auto-thermal reforming processes were investigated. Firstly, flowsheet models were developed for both the stand-alone systems and auto-thermal reforming process using ASPEN HYSYS ® . Furthermore, thermodynamic studies were conducted for the stand-alone and auto-thermal reforming processes for temperatures range of 200-1000°C and pressure range of 1-3 bar using Gibbs free energy minimization methods which was also performed using ASPEN HYSYS ® . The simulation of the auto-thermal reforming process was also performed at 20 bar to mimic industrial process. Process parameters were optimized in the combined reforming process for hydrogen production using desirability function. The simulation results show that 84.60 kg/h, 62.08 kg/h and 154.7 kg/h of syngas were produced from 144 kg/h, 113 kg/h and 211 kg/h of the gas fed into the Gibbs reactor at CH 4 /CO 2 /O 2 ratio 1:1:1 for the stand-alone dry reforming, partial oxidation reforming and auto-thermal processes respectively. Equilibrium conversion of CH 4 , CO 2 , O 2 were thermodynamically favoured between 400 and 800°C with highest conversions of 100%, 95.9% and 86.7% for O 2 , CO 2 and CH 4 respectively. Highest yield of 99% for H 2 and 40% for CO at 800°C was obtained. The optimum conditions for hydrogen production were obtained at CH 4 /CO 2 , CH 4 /O 2 ratios of 0.634, 0.454 and temperature of 800°C respectively. The results obtained in this study corroborate experimental studies conducted on auto-thermal reforming of methane for hydrogen and syngas production.

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Thermodynamic analysis of mixed and dry reforming of methane for solar thermal applications

Cited by 63 publications

References 10 publications

Catalytic activity of hydrotalcite-derived catalysts in the dry reforming of methane: on the effect of Ce promotion and feed gas composition

Catalytic activity of hydrotalcite-derived catalysts in the dry reforming of methane: on the effect of Ce promotion and feed gas composition

Ordered mesoporous “one-pot” synthesized Ni-Mg(Ca)-Al2O3 as effective and remarkably stable catalysts for combined steam and dry reforming of methane (CSDRM)

Process Modelling, Thermodynamic Analysis and Optimization of Dry Reforming, Partial Oxidation and Auto-Thermal Methane Reforming for Hydrogen and Syngas production

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