Ammonia permeation of fluorinated sulfonic acid polymer/ceramic composite membranes
Ammonia permeation of fluorinated sulfonic acid polymer/ceramic composite membranes
复制标题
氟化磺酸聚合物/陶瓷复合膜的氨透过率
DOI：
10.1016/j.memsci.2022.120718
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发表时间：
2022
影响因子：
9.5
通讯作者：
Tsuru Toshinori
中科院分区：
文献类型：
--
作者：
Wakimoto Kotaro;Yan Wei-Wei;Moriyama Norihiro;Nagasawa Hiroki;Kanezashi Masakoto;Tsuru Toshinori
NH3是一种潜在的环保能源，通常通过Haber-Bosch工艺在恶劣条件下(400-500摄氏度和10-30兆帕)使用铁基催化剂从H2和N2中生产。然而，最近开发的低温活性催化剂可以使该反应在250℃以下进行。因此，开发一种能够将这些低温活性催化剂与选择性地选择NH3的膜相结合的膜系统将是有益的。本研究以含氟磺酸聚合物Nafion和Aquivion为原料，制备了新型聚合物/陶瓷复合膜。通过DLS、TG和FT-IR对Nafion和Aquivion溶液进行了表征，将Nafion和Aquivion溶液涂覆在陶瓷多孔载体上，在150℃下干燥，用于制备氟磺酸聚合物/陶瓷复合膜，并对NH3、H2和N2的渗透性能进行了评估。与常规聚合物膜相比，含氟磺酸聚合物/陶瓷复合膜在200℃下仍具有较好的热稳定性。Nafion膜和Aquivion-H+/陶瓷膜的单组分氨渗透率在50~200℃时分别达到>；9.30−7mol/m−2S−1PA−1和>；1.55×10−6mol/m−2S−1PA−1。在50℃的混合体系中，NH_3/H_2的NH_3选择性为>；90，NH_3/N_2的NH_3渗透率为>；800。在50℃的混合体系中，NH_3的渗透率为>；2.31×10~(-10)−/m−_2S_−_1PA−_1。
NH3is potentially an eco-friendly source of energy that normally is produced from H2and N2via the Haber-Bosch process under harsh conditions (400–500 °C and 10–30 MPa) with iron-based catalysts. The recent development of low-temperature active catalysts, however, could allow this reaction to proceed below 250 °C. Therefore, the development of a membrane system that could combine these low-temperature active catalysts with membranes selective for NH3would be beneficial. In this study, the fluorinated sulfonic acid polymers Nafion and Aquivion were used to fabricate novel polymer/ceramic composite membranes. Following characterization by DLS, TG, and FT-IR measurements, Nafion and Aquivion solutions were coated onto ceramic porous supports and dried at 150 °C for use in fabricating fluorinated sulfonic acid polymer/ceramic composite membranes, and the permeances for NH3, H2, and N2were evaluated. In comparisons with conventional polymer membranes, the fluorinated sulfonic acid polymer/ceramic composite membranes were thermally stable even at 200 °C. The Nafion and Aquivion-H+/ceramic membranes showed single-component NH3permeance that reached >9.30 × 10−7mol m−2s−1Pa−1and >1.55 × 10−6mol m−2s−1Pa−1at 50–200 °C, respectively. Moreover, NH3permeance of >2.31 × 10−6mol m−2s−1Pa−1was obtained from Aquivion-H+with NH3selectivity >90 for NH3/H2and >800 for NH3/N2at 50 °C in a mixed system.