Selective removal of carbon dioxide and hydrogen sulfide from other gases is usually difficult to achieve because most of the available sorbents will also adsorb other unwanted molecules. SAPO-43 is a microporous sorbent with appropriate dimensions and characteristics for these types of separations, but previous studies have shown that, because of low thermal stability, it is not suitable. This study discusses a procedure developed to partially remove the organic moiety used for synthesis of SAPO-43 while preserving the framework. The thermal process to remove the template (isopropylamine) results in decomposition of the species, which is believed to be a result of a Hofmann elimination process. Afterward, the partially calcined silicoaluminophosphate can be used as a selective adsorbent to separate! molecules like CO(2), H(2)O, and H(2)S while excluding molecules such as N(2), CH(4), and O(2). In general, it was found that SAPO-43 has adsorption capacities of 1.1, 4.93, and 2.52 mmol/g for CO(2), H(2)O, and H(2)S, respectively, at 25 degreesC and atmospheric conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据