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The objective of this research is to study the performance of an inexpensive high-surface-area nanoporous titanium oxide (TiO 2 ) on the CO 2 /H 2 separation and resulting pre-combustion CO 2 capture. The experiments were carried out at different temperatures (25, 50, 75, 100, and 125 °C) and pressures (5, 10, 15, 20, 25, 30, and 35 bar) using a fixed-bed adsorber. The data obtained for the pure component isotherms and binary gas mixtures were correlated using Sips and Langmuir−Freundlich binary-component-expanded isotherm adsorption (LFBE) models, respectively. Also, the deactivation model was used to simulate the observed CO 2 sorption breakthrough curves. Experimental results show that the capture capacities of the sorbent for both H 2 and CO 2 were improved with the increase in the pressure and decrease in the temperature. The maximum sorption capacities for pure CO 2 and H 2 were found to be 14.4 and 5.2 mmol/g of TiO 2 at 35 bar and 25 °C, respectively. The increase in the temperature and decrease in the pressure improve the sorption selectivity of TiO 2 for CO 2 . The selectivity value of TiO 2 reached 9.87 at 125 °C and 5 bar for a CO 2 /H 2 molar ratio of 50:50. TiO 2 also shows great stability and regenerability. This study indicates that nanoporous TiO 2 is potentially a cost-effective and robust CO 2 /H 2 separation agent and provides the knowledge needed for further demonstration of the nanoporous TiO 2 -based pre-combustion CO 2 separation technology.

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This paper reports the investigation on non-fragile state feedback control for stochastic Markovian jump systems with uncertain parameters and mode-dependent time-varying delays. The resulted closed-loop system is stochastic stabilization by virtue of an improved L-K functional. By free-weight-matrix technique, the non-fragile state feedback controller is designed and novel conditions for robust stochastic stabilization are acquired in the form of linear matrix inequalities. Two examples including a take-off and landing guidance system are employed to show the effectiveness and validity of the proposed approach.INDEX TERMS Non-fragile controller, Itô stochastic system, parametric uncertain Markovian jump system, stochastic stabilization, mode-dependent time-varying delays.