In-situ CO2 capture in a pilot-scale fluidized-bed membrane reformer for ultra-pure hydrogen production

Mahecha‐Botero, Andrés; Boyd, Tony; Grace, John R.; Lim, C. Jim; Gulamhusein, Ali; Wan, Brian; Kurokawa, Hiromi; Shirasaki, Yoshinori

doi:10.1016/j.ijhydene.2010.09.091

Cited by 53 publications

(16 citation statements)

References 41 publications

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“…Several studies proved the feasibility of SESMR by the raw mixing of catalyst and sorbent particles (from this point on named 2-particles systems). [14,[23][24][25][26][27] The goal of WP4 was to develop combined sorbent-catalyst materials (CSCM) for SESMR, that is, solid particles containing both catalytic phase for SMR and sorbent phase for CO 2 capture. CSCM possesses process advantages that the 2-particles system does not: (a) it avoids inter-particle and intra-particle diffusivity resistances [28][29][30][31] ; (b) it possesses more intimate thermal integration between endothermic and exothermic reactions [17] ; and (c) it causes a reduction in solid holdup in heterogeneous reactors.…”

Section: Introductionmentioning

confidence: 99%

Sorption enhanced steam methane reforming by Ni/CaO/mayenite combined systems: Overview of experimental results from European research project ASCENT

et al. 2020

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Work Package 4 (WP4) of the European research project ASCENT developed combined sorbent‐catalyst materials (CSCM) for sorption enhanced steam methane reforming (SESMR), based on nickel (Ni) and calcium oxide (CaO). This work summarizes the whole experimental study carried out in ASCENT WP4 on Ni/CaO/mayenite systems obtained from wet mixing and wet impregnation synthesis methods. Effects from Ni precursor (Ni (CH3COO)2 · 4H2O or Ni(NO3)2 · 6H2O), Ni load (from 3 wt%‐10 wt%), and free CaO load (from 0 wt%‐54 wt%) were investigated for 26 materials by means of characterizations and reforming reactivity tests in a packed‐bed microreactor (650°C, 1 atm). Thanks to comparative analyses of the results, evidence emerged about the detrimental influence of low Ni/CaO ratio on the reforming catalytic activity of solid inventories, made of CSCM or even of the raw mixing of CaO‐mayenite and Ni‐mayenite particles. Catalytic materials were active towards reforming only when derived from Ni(NO3)2 · 6H2O. Based on this, the best CSCM (with the lowest free CaO content and the highest Ni load from nickel nitrate) was chosen to further study its industrial applicability by multicycle SESMR/sorbent‐regeneration tests in a bench‐scale packed‐bed rig and attrition tests according to ASTM D5757‐11. The CSCM was stable and active for 200 cycles with regenerations in N2 at 850°C, while a progressive loss of its activity occurred with regenerations in CO2 at 925°C as the cycle number increased due to Ni sintering. Its performance in the attrition tests was comparable to that of calcined dolomite.

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Section: Introductionmentioning

confidence: 99%

Sorption enhanced steam methane reforming by Ni/CaO/mayenite combined systems: Overview of experimental results from European research project ASCENT

et al. 2020

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“…In both the experiments the composite membranes produced very pure hydrogen (selectivity larger than 10 4 ) from methane reforming [38,39].…”

Section: Introductionmentioning

confidence: 99%

Pressure effect in ethanol steam reforming via dense Pd-based membranes

Tosti

Fabbricino

Moriani

et al. 2011

Journal of Membrane Science

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“…The modified activated carbon developed in this study would serve this purpose because it has higher adsorption capacity and higher carbon dioxide selectivity compared to the native activated carbon without modification. The maximum of 3.76 mole of CO 2 adsorbed per kg of the chitosan impregnated activated carbon [see Figure 6(a)] was found to be comparable with the maximum of 3.39 mole of CO 2 adsorbed per kg of CaO during carbonation [36].…”

Section: Discussionmentioning

confidence: 64%

“…The study of carbon dioxide capture during hydrogen processes has gained growing attention by researchers worldwide. CO 2 capture has been coupled with hydrogen production via steam gasification of biomass [34], steam reforming of natural gas [35], [36], pyrolysis of biomass [37], integrated gasification combined cycle [38] and coal gasification [39]. For these applications, the desired sorbent must be able to adsorb/absorb CO 2 at relatively high temperatures.…”

Section: Discussionmentioning

confidence: 99%

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Impregnation of Chitosan onto Activated Carbon for Adsorption Selectivity Towards CO2: Biohydrogen Purification

2016

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In this study, a novel bio-based adsorbent was developed for biohydrogen purification by an adsorption process. Palm shell activated carbons were immersed in the chitosan solutions at the concentrations between 0.1-2 g/L. The results showed that the impregnation of chitosan onto activated carbons at every concentration under the investigation changed the BET surface areas, pore size distribution, CO 2 adsorption capacity and the CO 2 /H 2 selectivity. The chitosan impregnated activated carbon that was the most suitable for carbon dioxide/hydrogen separation was the one impregnated in the 0.1 g/L chitosan solution yielding 0.12 g chitosan per 100 gram activated carbon. The modified activated carbon was found to have 11% higher CO 2 adsorption capacity than the native activated carbon even though its BET surface area was reduced by 3% due to the impregnation process. From a lab-scale pressure swing adsorption process using the modified activated carbon as the adsorbent (under an adsorption pressure of 4 bar and the feed flow rate of 2 L/min 50-30-20 mixture of CO 2 , H 2 and N 2 for a period of 2 min per cycle), the CO 2 concentration in the effluent was not detected for at least 5 cycles.

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In-situ CO2 capture in a pilot-scale fluidized-bed membrane reformer for ultra-pure hydrogen production

Cited by 53 publications

References 41 publications

Sorption enhanced steam methane reforming by Ni/CaO/mayenite combined systems: Overview of experimental results from European research project ASCENT

Sorption enhanced steam methane reforming by Ni/CaO/mayenite combined systems: Overview of experimental results from European research project ASCENT

Pressure effect in ethanol steam reforming via dense Pd-based membranes

Impregnation of Chitosan onto Activated Carbon for Adsorption Selectivity Towards CO2: Biohydrogen Purification

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