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Carbon dioxide capture using hydrotalcite adsorbent/reforming catalyst

Dry Reforming Reaction:. CH 4 +CO 2. 2CO+2H 2. Δ H=246kJ/mol. Reaction Engineering at Birmingham Joe Wood, Bushra Al-Duri, Suzanne Al-Samaq C-Cycle Project: Capture of Carbon Dioxide and Reforming to Make Hydrogen. Carbon dioxide capture using hydrotalcite adsorbent/reforming catalyst.

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Carbon dioxide capture using hydrotalcite adsorbent/reforming catalyst

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  1. Dry Reforming Reaction: CH4+CO2 2CO+2H2 ΔH=246kJ/mol Reaction Engineering at BirminghamJoe Wood, Bushra Al-Duri, Suzanne Al-SamaqC-Cycle Project: Capture of Carbon Dioxide and Reforming to Make Hydrogen • Carbon dioxide capture using hydrotalcite adsorbent/reforming catalyst CO2 capture Catalysis/activation Syngas • Hydroxycarbonate of Mg and Al • Brucite (Mg(OH)2) layers • Mg2+ ions substituted by other metals • (CO3)2- ions in the interlayer

  2. Hydrotalcite Preparation Procedure Ni(NO3)2 Mg(NO3)2 Al(NO3)3 K2CO3 NaOH Add Dropwise Vigorous stirring 70oC Hydrotalcite Precipitates Filter Dry (80oC, 12 hrs) Hydrotalcite Crystals Finished catalyst Calcine (600oC, 8hrs) Mixed Oxides Reduce 10% H2/N2 (600oC, 1hr) SEM of hydrotalcite synthesised at pH 8.5

  3. Dry Reforming of Methane Tests Reaction Conditions 6 g catalyst 25 ml/min flow CO2, 25 ml/min flow CH4 Reaction at 750 °C, 1 bar Dry Reforming Reactor (housed in cabinet funded by Science City) Catalyst-A: Ni2+/Mg2+/Al3+-(0.33:0.33:0.33) Catalyst-B: Ni2+/Mg2+/Al3+/Fe3+-(0.3:0.3:0.29:0.1) Catalyst-C: Ni2+/Co2+/Al3+-(0.33:0.33:0.33) Catalyst-D: Ni2+/Co2+/Al3+/Fe3+/ (0.33:0.33:0.29:0.1)

  4. Results of Dry Reforming Tests Catalyst still Active after 400 mins Catalyst-B: Ni2+/Mg2+/Al3+/Fe3+-(0.3:0.3:0.29:0.1) gives highest conversion

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