Department of Chemical Engineering and Research Center of Chemical Technology, Hankyong National University, Anseong, Gyeonggi-Do 456-749, Republic of Korea.
Department of Chemical Engineering and Research Center of Chemical Technology, Hankyong National University, Anseong, Gyeonggi-Do 456-749, Republic of Korea.
Bioresour Technol. 2014 May;159:446-50. doi: 10.1016/j.biortech.2014.03.046. Epub 2014 Mar 20.
In this study, nanoparticles were used to enhance bioethanol production in syngas fermentation by Clostridium ljungdahlii. Six types of nanoparticles were tested: palladium on carbon, palladium on alumina, silica, hydroxyl-functionalized single-walled carbon nanotubes, alumina, and iron(III) oxide. Of these, silica nanoparticles at a concentration of 0.3 wt% were the best at enhancing gas-liquid mass transfer. The hydrophilic surfaces of silica nanoparticles were modified with hydrophobic functional groups such as methyl and isopropyl. Methyl-functionalized silica nanoparticles were better than unmodified and isopropyl-functionalized silica nanoparticles at enhancing mass transfer. The dissolved concentrations of CO, CO2, and H2 were enhanced by 272.9%, 200.2%, and 156.1%, respectively, by using methyl-functionalized silica nanoparticles. The use of methyl-functionalized silica nanoparticles at a concentration of 0.3 wt% during syngas fermentation by C. ljungdahlii led to significant increases in the levels of biomass, ethanol, and acetic acid production (34.5%, 166.1%, and 29.1%, respectively).
在这项研究中，使用纳米颗粒来增强产甲烷梭菌（Clostridium ljungdahlii）在合成气发酵中的生物乙醇生产。测试了六种类型的纳米颗粒：钯碳、钯氧化铝、二氧化硅、羟基功能化单壁碳纳米管、氧化铝和三氧化二铁。其中，浓度为 0.3wt%的二氧化硅纳米颗粒在增强气液传质方面效果最佳。二氧化硅纳米颗粒的亲水表面用疏水性官能团如甲基和异丙基进行修饰。与未修饰和异丙基修饰的二氧化硅纳米颗粒相比，甲基修饰的二氧化硅纳米颗粒在增强传质方面效果更好。使用甲基修饰的二氧化硅纳米颗粒可将溶解的 CO、CO2 和 H2 浓度分别提高 272.9%、200.2%和 156.1%。在产甲烷梭菌的合成气发酵中使用浓度为 0.3wt%的甲基修饰的二氧化硅纳米颗粒可显著提高生物质、乙醇和乙酸的产量（分别提高 34.5%、166.1%和 29.1%）。
