超声辅助生物柴油生产中固体催化剂的可重复使用性和再生
Reusability and regeneration of solid catalysts used in ultrasound assisted biodiesel production.
作者信息
Bayramoğlu Mahmut, Korkut İbrahim, Temur Ergan Başak
机构信息
Chemical Engineering Department, Gebze Technical University, Gebze Turkey.
Chemical Engineering Department, Sivas University of Science and Technology, Sivas Turkey.
出版信息
Turk J Chem. 2021 Apr 28;45(2):342-347. doi: 10.3906/kim-2008-33. eCollection 2021.
Reusability of two heterogeneous catalysts in ultrasound (US) assisted biodiesel production was investigated in comparison to each other. An ultrasound (US) generator (200 W, 20 kHz) equipped with a horn type probe (19 mm) was used. Regeneration experiments were planned according to second order central composite design (CCD) method. After the eighth use of the catalysts, biodiesel yield decreased from 99.1% to 90.4% for calcined calcite (CaO) and from 98.8% to 89.8% for calcined dolomite (CaO.MgO). Furthermore, regeneration of spent catalysts by calcination was investigated; optimum temperature and time were found as 750 °C and 90 min, lower than fresh catalyst preparation conditions. The regenerated catalysts were reused in a second process cycle; biodiesel yield was calculated as 97.2% for CaO and 96.5% for CaO.MgO. Finally, the process showed that calcination is an energetically favorable regeneration process of spent catalysts.
研究了两种非均相催化剂在超声辅助生物柴油生产中的相互可重复使用性。使用了配备喇叭型探头（19毫米）的超声（US）发生器（200瓦，20千赫）。根据二阶中心复合设计（CCD）方法进行了再生实验。在催化剂使用八次后，煅烧方解石（CaO）的生物柴油产率从99.1%降至90.4%，煅烧白云石（CaO.MgO）的生物柴油产率从98.8%降至89.8%。此外，还研究了通过煅烧对废催化剂进行再生；发现最佳温度和时间分别为750℃和90分钟，低于新鲜催化剂制备条件。再生后的催化剂在第二个工艺循环中重复使用；CaO的生物柴油产率计算为97.2%，CaO.MgO的生物柴油产率计算为96.5%。最后，该工艺表明煅烧是废催化剂在能量方面有利的再生过程。
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