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Preparation of High Sorption Durability Nano-CaO–ZnO CO2 Adsorbent
Energy & Fuels ( IF 5.2 ) Pub Date : 2019-07-16 00:00:00 , DOI: 10.1021/acs.energyfuels.9b01770 Hao Liu 1 , Sufang Wu 1
Energy & Fuels ( IF 5.2 ) Pub Date : 2019-07-16 00:00:00 , DOI: 10.1021/acs.energyfuels.9b01770 Hao Liu 1 , Sufang Wu 1
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ZnO was doped into nano-CaO adsorbents to increase the sorption durability in the calcium looping (CaL) process. The preparation of a nano-CaO–ZnO adsorbent was studied in detail by varying the ZnO additive amounts and thermal pretreatment conditions. Also, the performance of the nano-CaO–ZnO adsorbent was evaluated under different CaL operation conditions. The results showed that the carbonation conversion of CaO in the adsorbent was stably kept as 57.4% after 15 cycles when the optimum values of the molar ratio of CaO to ZnO was 8, thermal pretreatment temperature and time were 850 °C and 1 h, respectively, and the carbonation and regeneration temperatures were 700 and 750 °C, respectively. The anti-sintering performance of ZnO was close to that of ZrO2 and TiO2 and better than that of MgO and Al2O3. The reason for the high durability of the nano-CaO–ZnO adsorbent was that low thermal expansibility dopant ZnO, could promote the recurrence of nano-CaO grains, leading to self-reactivation in the CaL process.
中文翻译：
高吸附耐久性的纳米CaO–ZnO CO 2吸附剂的制备
将ZnO掺杂到纳米CaO吸附剂中，以增加钙环化（CaL）过程中的吸附耐久性。通过改变ZnO的添加量和热预处理条件，详细研究了纳米CaO-ZnO吸附剂的制备。同样，在不同的CaL操作条件下评估了纳米CaO–ZnO吸附剂的性能。结果表明，当CaO与ZnO的摩尔比的最佳值为8时，热预处理温度和时间分别为850°C和1 h，CaO在碳酸钙中的碳酸转化率在15个循环后稳定保持在57.4％。 ，碳化和再生温度分别为700和750°C。ZnO的抗烧结性能接近ZrO 2和TiO 2并且比MgO和Al 2 O 3更好。纳米CaO–ZnO吸附剂具有高耐久性的原因是，低热膨胀性掺杂剂ZnO可以促进纳米CaO晶粒的再生，从而导致CaL过程中的自活化。
更新日期：2019-07-16
中文翻译：
高吸附耐久性的纳米CaO–ZnO CO 2吸附剂的制备
将ZnO掺杂到纳米CaO吸附剂中，以增加钙环化（CaL）过程中的吸附耐久性。通过改变ZnO的添加量和热预处理条件，详细研究了纳米CaO-ZnO吸附剂的制备。同样，在不同的CaL操作条件下评估了纳米CaO–ZnO吸附剂的性能。结果表明，当CaO与ZnO的摩尔比的最佳值为8时，热预处理温度和时间分别为850°C和1 h，CaO在碳酸钙中的碳酸转化率在15个循环后稳定保持在57.4％。 ，碳化和再生温度分别为700和750°C。ZnO的抗烧结性能接近ZrO 2和TiO 2并且比MgO和Al 2 O 3更好。纳米CaO–ZnO吸附剂具有高耐久性的原因是，低热膨胀性掺杂剂ZnO可以促进纳米CaO晶粒的再生，从而导致CaL过程中的自活化。
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