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Author(s): |
Yubao Chen, Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, China College of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming,
Ping Ning, College of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, China
Haiyan Sun, Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, China
Wudi Zhang, Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, China
Fang Yin, Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, China
Jianchang Li, Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, China
Rui Xu, Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, China |
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Abstract: |
Experimental study was done about change of breakthrough curve and absorbent bed temperature, CO purity in product gas and CO recovery rate, relationship between adsorbent bed and time in depressurization process, evacuation process and pressurization process. The experimental result indicated that: with increase of adsorption pressure, breakthrough time of adsorbent bed changed little, while with increase of feed gas flow, breakthrough time of adsorbent bed was shortened. When breakthrough curve reached breakthrough point, it went up in straight and sharp line, which gained balance in short time. Meanwhile, temperature of lower part of adsorbent bed increased firstly, next to the middle and the upper parts, which explained that mass transfer zone moved from down to up. The purity of product gas was greatly affected by low concentration feed gas CO, when it was above 20%, the purity of product gas was kept more than 95%. While with concentration increasing in feed gas CO, CO recovery rate decreased on the contrary, when it exceeded 40%, CO recovery rate decreased greatly. The decreasing rate of top pressure in adsorbent bed slowed with prolonging of time in depressurization process, and the decreasing trade of pressure was almost the same in every pressure equalization step. The better evacuation time was 120s, which can be seen from top pressure changing with time in evacuation process of absorbent bed. The increasing rate slowed with time of top pressure in adsorbent bed in every pressurization step, while changed greatly in the final pressurization step.
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