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TiO(OH)2 Nanoparticle Composite Membranes for Enhancing the Hot Potash Process
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-04-03 , DOI: 10.1021/acsanm.9b02423 Ebrahim Ataeivarjovi 1 , Yubing Liu 2 , Zhigang Tang 1 , Hao Ding 1 , Dong Guo 1 , Xiaofei Song 2 , Guoxun Ben 1 , Mengyue Zhou 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-04-03 , DOI: 10.1021/acsanm.9b02423 Ebrahim Ataeivarjovi 1 , Yubing Liu 2 , Zhigang Tang 1 , Hao Ding 1 , Dong Guo 1 , Xiaofei Song 2 , Guoxun Ben 1 , Mengyue Zhou 1
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The desorption process of CO2 absorbed by the hot-potash-alkali method was studied in this paper. In a traditional hot-potash-alkali process, the temperatures of KHCO3 aqueous solutions are high, moisture vaporization is serious, and energy consumption is high. We proposed that membrane desorption can be used instead of heating desorption and conducted relevant research. PDMS-PTFE-PVDF/PET was used as a composite membrane. The water evaporation considerably declined, and the decomposition conversion rate reduced to 25.5% as the equilibrium liquid-phase concentration decreased. Results show that the PDMS-PTFE-PVDF/PET composite membrane loaded with 1 wt % TiO(OH)2 nanoparticles can be used for membrane desorption, while the decomposition conversion rate of the KHCO3 aqueous solution decreased by only 4.2% after 10 cycles, and the effect was considerably improved. The comprehensive capture energy consumption was about 65% lower than that of the absorption-heating desorption process on account of the positive effect of TiO(OH)2 nanoparticles. Brief calculation, which is based on CO2 concentration tested by a gas analyzer and the linear fitting of the Arrhenius equation, demonstrates that the reaction activation energy can be reduced (Supporting Information).
中文翻译：
TiO（OH）2纳米复合膜增强热钾工艺
研究了热钾碱法吸收CO 2的解吸过程。在传统的热碱法中，KHCO 3水溶液的温度高，水分蒸发严重，并且能量消耗高。我们建议使用膜脱附代替加热脱附，并进行了相关研究。PDMS-PTFE-PVDF / PET用作复合膜。随着平衡液相浓度的降低，水的蒸发显着下降，并且分解转化率降低至25.5％。结果表明，PDMS-PTFE-PVDF / PET复合膜负载1 wt％TiO（OH）2纳米颗粒可用于膜解吸，而KHCO 3水溶液的分解转化率在10个循环后仅降低了4.2％，效果得到了显着改善。由于TiO（OH）2纳米颗粒的积极作用，其综合捕集能耗比吸收加热解吸过程的能耗低约65％。简短的计算基于气体分析仪测试的CO 2浓度和Arrhenius方程的线性拟合，表明可以降低反应活化能（支持信息）。
更新日期：2020-04-03
中文翻译：
TiO（OH）2纳米复合膜增强热钾工艺
研究了热钾碱法吸收CO 2的解吸过程。在传统的热碱法中，KHCO 3水溶液的温度高，水分蒸发严重，并且能量消耗高。我们建议使用膜脱附代替加热脱附，并进行了相关研究。PDMS-PTFE-PVDF / PET用作复合膜。随着平衡液相浓度的降低，水的蒸发显着下降，并且分解转化率降低至25.5％。结果表明，PDMS-PTFE-PVDF / PET复合膜负载1 wt％TiO（OH）2纳米颗粒可用于膜解吸，而KHCO 3水溶液的分解转化率在10个循环后仅降低了4.2％，效果得到了显着改善。由于TiO（OH）2纳米颗粒的积极作用，其综合捕集能耗比吸收加热解吸过程的能耗低约65％。简短的计算基于气体分析仪测试的CO 2浓度和Arrhenius方程的线性拟合，表明可以降低反应活化能（支持信息）。
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