Biomimetic CO₂ capture using a highly thermostable bacterial α-carbonic anhydrase immobilized on a polyurethane foam

Figures & data

Figure 1.  Scheme of the experimental apparatus used for CO₂ biomimetic absorption tests by three-phase trickle-bed reactor.

Table 1.  Comparison of the hydratase activity for the immobilized and free enzyme incubated at 25°C for several days.

	Hydratase activity^1
Incubation time	PU-SspCA	Free enzyme
1 day	1900	3250
6 day	1934	3123
30 day	1910	2756

¹WAU/mg protein.

Figure 2.  Test of CO₂ biomimetic absorption by three-phase trickle-bed reactor. Effect of water flow rate on CO₂ conversion efficiency as function of time on stream. Amount of catalyst = 25 g. Gas flow rate = 0.5 l/min. T = 25 °C. P = 1.1 bar.

Figure 3.  Test of CO₂ biomimetic absorption by three-phase trickle-bed reactor. Effect of gas flow rate on CO₂ conversion efficiency as function of time on stream. Amount of catalyst = 25 g. Water flow rate = 50 ml/min. T = 25 °C. P = 1.1 bar.

Figure 4.  Test of CO₂ biomimetic absorption by three-phase trickle-bed reactor. Effect of reactor operative condition (cocurrent downflow vs countercurrent flow) on CO₂ conversion efficiency as function of time on stream. Amount of catalyst = 25 g. Gas flow rate = 0.1 l/min. Water flow rate = 10 ml/min. T = 25 °C. P = 1.1 bar.