A NEW COMPOSITE SORBENT FOR METHANE-NITROGEN SEPARATION BY ADSORPTION

被引：33
作者：
BAKSH, MSA [1 ]
KAPOOR, A [1 ]
YANG, RT [1 ]
机构：
[1] SUNY BUFFALO,DEPT CHEM ENGN,BUFFALO,NY 14260
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 1990年 / 25卷 / 7-8期
关键词：
D O I：
10.1080/01496399008050370
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Composite sorbents were prepared by depositing molybdenum dioxide on Super A activated carbon. The adsorption isotherms of CH4 and N2 were measured. The adsorption capacities and BET surface areas of these adsorbents decreased with an increase in the amount of MoO2; however, the equilibrium selectivity ratio (CH4/N2) increased significantly. Therefore, an optimum quantity of moo2 should be used to produce a sorbent with high adsorption capacity and selectivity ratio (CH4/N2). An adsorbent containing 18.2 wt% MoO2 was found to be optimum which showed a CH4/N2 selectivity ratio of 4.25. The selectivity ratio decreased with pressure, and leveled off to about 3 at 12 atm. The separation of a CH4/N2 (50/50) mixture by pressure swing adsorption (PSA) was studied by using an equilibrium model. A new PSA cycle is described by which pipeline quality methane (>90% CH4 purity) could be produced using the composite sorbent at a recovery of 73% and a throughput of 200 L STP/h/kg. © 1990, Taylor & Francis Group, LLC. All rights reserved.
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页码：845 / 868
页数：24
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