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 ΔH=246kJ/molCH 4 +CO 2 2CO+2H 2 Dry Reforming Reaction: CO 2 capture Catalysis/activation Syngas Hydroxycarbonate of Mg and Al Brucite (Mg(OH) 2 ) layers Mg 2+ ions substituted by other metals (CO 3 ) 2- ions in the interlayer

Hydrotalcite Preparation Procedure Ni(NO 3 ) 2 Mg(NO 3 ) 2 Al(NO 3 ) 3 K 2 CO 3 NaOH Add Dropwise Vigorous stirring 70 o C Hydrotalcite Precipitates Hydrotalcite Crystals Filter Dry (80 o C, 12 hrs) Mixed Oxides Finished catalyst Calcine (600 o C, 8hrs) Reduce 10% H 2 /N 2 (600 o C, 1hr) SEM of hydrotalcite synthesised at pH 8.5 SampleSurface area m 2 g -1 Ni/Mg/Al 3+ powder Ni/Mg/Al 3+ /Fe 3+ powder 156.4

Dry Reforming of Methane Tests Reaction Conditions 6 g catalyst 25 ml/min flow CO 2, 25 ml/min flow CH 4 Reaction at 750 °C, 1 bar Catalyst-A: Ni 2+ /Mg 2+ /Al 3+ -(0.33:0.33:0.33) Catalyst-B: Ni 2+ /Mg 2+ /Al 3+ /Fe 3+ -(0.3:0.3:0.29:0.1) Catalyst-C: Ni 2+ /Co 2+ /Al 3+ -(0.33:0.33:0.33) Catalyst-D: Ni 2+ /Co 2+ /Al 3+ /Fe 3+ / (0.33:0.33:0.29:0.1) Dry Reforming Reactor (housed in cabinet funded by Science City)

Results of Dry Reforming Tests Catalyst-B: Ni 2+ /Mg 2+ /Al 3+ /Fe 3+ -(0.3:0.3:0.29:0.1) gives highest conversion Catalyst still Active after 400 mins