| Issue |
HWAHAK KONGHAK,
Vol.37, No.5, 706-712, 1999
Vol.37, No.5, 706-712, 1999
다층 흡착탑에서 H2/CO와 H2/CH4 혼합기체의 흡착 동특성
Dynamic Characteristics of Adsorption for H2/CO and H2/CH4 Mixtures in Layer Bed
활성탄과 제올라이트 5A가 50:50비로 충전된 흡착탑에서 2성분 수소 혼합물의 파과 실험을 통하여 다중 흡착탑의 흡착 동특성을 연구하였다. 수소 혼합물로는 H2/CO(70:30 vol%)와 H2/CH4(70:30 vol%)를 사용하였으며, 각 계에 대하여 흡착압력 및 공급유량의 영향을 살펴보았다. 조작압력이 높을수록 그리고 공급유속이 적을수록 파과시간이 연장되었다. 또한 흡착열로 인한 탐내 온도 영향으로 파과곡선은 두 이성분계 모두에서 tailing을 보였으며, 본 계의 흡착탑 모사에 에너지수지식이 필요하였다. 이러한 다중 흡착탑에서 각 흡착질들은 각 흡착층에서 고유의 농도분포와 온도분포를 보였으며, 따라서 흡착제의 배열과 각 흡착제 층의 길이 결정이 고순도 수소생산에 중요한 역할을 한다.
Dynamic characteristics of adsorption using a layered bed packed with activated carbon and zeolite 5A in ratio of 50:50 were studied through the breakthrough experiments of H2CO(70:30 vol%) and H2/CH4(70:30 vol%) mixtures. Effects of adsorption pressure and feed flow rate on the breakthrough curves in the layered bed were observed. The higher adsorption pressure or the lower feed flow rate, the longer the breakthrough time became. Since breakthrough curves in both binary systems had tail due to temperature variance in the bed by the heat of adsorption, the energy balance should be applied to the simulation of adsorption dynamics. In the layered bed, each bonary mixture showed the specific characteristics of concentration and temperature wave fronts in each layer. As a result, the configuration and ratio adsorbents in the layered bed will play an important role in obtaining the high purity product.
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