고농도의 수소를 제조하기 위해, 흡착부과반응기를 이용한 스팀-메탄 개질 반응을 수행하였다. Cahn balance를 이용하여 흡착부과반응기에 사용되는 고온용 CO₂ 흡착제의 CO₂ 흡착량을 측정하였는데, K₂CO₃)/hydrotalcite가 고온용 CO₂ 흡착제로서 적당하였다. K₂CO₃/hydrotalcite는 K₂CO₃ 함침에 의한 염기성 증가라 기공 구조의 변형으로, 450℃와 0.3 atm의 CO₂ 압력에서 0.575 mmol/g의 높은 CO₂ 흡착량을 보였다. 상업적 촉매, Ni/Al₂O₃ 만을 이용한 500℃에서의 스팀-메탄 개질 반응은 스팀과 메탄의 반응물 비가 6:1에서는 과량의 스팀에 의해 촉매의 비활성화가 나타났지만, 3:1의 반응물 조건에서는 40.9% H₂, 48.4% CH₄, 10.7% CO₂, 0.35% CO의 적절한 촉매 활성이 나타났다. 촉매와 CO₂ 흡착제가 동시에 충전된 흡착부과반응기를 이용한 스팀-메탄 개질 반응은 흡착제에 의한 CO₂ 흡착으로 평형 농도 이상의 고공도 수소를 얻을 수 있었는데, 반응물 공간 속도 5.81 mmol/g_(cal.)-h에서 얻어지는 최대 수소 농도는 84.8%이었으며, 부생성물인 CO₂가 파과되기 전까지 얻어진 H₂ 수율은 67.1%이었다.

To produce high concentration of hydrogen, steam-methane reforming reaction was carried out by using sorption enhanced reaction process. Cahn balance was used to check CO₂ adsorption capacities of the CO₂ adsorbents which could be applicable to the sorption enhanced reaction process at high temperature. and K₂CO₃/hydrotacite was selected as the most suitable CO₂ adsorbent at the high temperature. The K₂CO₃/hydrotalcite showed a high CO₂ adsorption capacity as much as 0.575mmol/g at 450℃ and 0.3 atm of CO, pressure because of its increased basicity and pore structure modification by K₂CO₃ impregnation. In the steam-methane reforming reaction using Ni/Al₂O₃ catalyst without CO₂ adsorbent at 500℃. there was catalyst deactivation due to excess amount of steam in case of 6:1 steam and methane ratio, but there was suitable catalyse activity such as 40.9% H₂, 48.4% CH,, 10.7% CO₂, and 0.35% CO of product composition for 3:1 reactants ratio. In the sorption enhanced reaction process using a reactor packed with the catalyst and the CO, adsorbent simultaneously, high concentration of hydrogen above the equilibrium was generated via CO₂ adsorption by the adsorbent, and the maximum concentration of hydrogen was 84.8% and the hydrogen yield was 67.1% until by-product CO₂ broke-through.