当前位置: X-MOL 学术Micropor. Mesopor. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Synthesis and characterization of NaX-type zeolites prepared by different silica and alumina sources and their CO2 adsorption properties
Microporous and Mesoporous Materials ( IF 4.8 ) Pub Date : 2020-09-12 , DOI: 10.1016/j.micromeso.2020.110632
Somkiat Krachuamram , Kingkaew Chayakul Chanapattharapol , Nuntaporn Kamonsutthipaijit

In this work, two pairs of silicon and aluminium sources (sodium silicate solution + Al(OH)3 and sodium silicate powder + sodium aluminate) were used for synthesizing zeolites which were labeled as Z1 and Z2, respectively. The results from XRD, BET and surface analysis indicated that sodium silicate and sodium aluminate sources yielded zeolite with high surface area and pore volume. Cetyltrimethylammonium bromide (CTAB) and heptane were used to modify the CO2 adsorption capacity and selectivity of zeolite NaX. The surface area and pore volume of zeolite products increased due to smaller crystalline size and then resulted in significant enhancement of CO2 uptake of the synthesized zeolite NaX. The role of additives on zeolite formation was to increase the nuclei formation rate and number which gave rise to smaller zeolite crystals. The best adsorbent exhibited high CO2 adsorption capacity (5.08 mmol g−1 at 303 K) and relatively high CO2 selectivity over N2 (116) which indicated the potential of adsorbent to separate CO2 from flue gas application.



中文翻译:

不同二氧化硅和氧化铝源制备的NaX型沸石的合成,表征及其对CO 2的吸附性能

在这项工作中,使用两对硅和铝源(硅酸钠溶液+ Al(OH)3和硅酸钠粉末+铝酸钠)来合成分别标记为Z1和Z2的沸石。XRD,BET和表面分析的结果表明,硅酸钠和铝酸钠源产生具有高表面积和孔体积的沸石。十六烷基三甲基溴化铵(CTAB)和庚烷用于改变沸石NaX的CO 2吸附能力和选择性。沸石产品的表面积和孔体积由于较小的晶体尺寸而增加,然后导致CO 2的显着提高。合成沸石NaX的吸收。添加剂对沸石形成的作用是增加核形成速率和核数目,从而产生较小的沸石晶体。最好的吸附剂表现出高的CO 2吸附容量(在303 K下为5.08 mmol g -1)和相对于N 2(116)的相对较高的CO 2选择性,表明吸附剂有可能从烟气中分离出CO 2

更新日期:2020-09-20
down
wechat
bug