Climate Change Data Portal
| Collaborative Research: Multi-Regional Scale Aircraft Observations of Methane and Carbon Dioxide Isotopic Fluxes in the Arctic | |
| 项目编号 | 1208254 |
| John Langford | |
| 项目主持机构 | Aurora Flight Sciences Corporation |
| 开始日期 | 2012-09-15 |
| 结束日期 | 2014-08-31 |
| 英文摘要 | Sustainable generation of fuels through the catalytic conversion of CO2 is an area of research that has the potential to enhance national energy security while simultaneously providing a mechanism to minimize direct CO2 emissions. Previous studies on CO2 photoreduction to fuels have utilized TiO2-based catalysts. A major challenge that exists with utilizing TiO2 as a photocatalyst for CO2 photoreduction is the fast recombination of electron-hole pairs which are formed by light irradiation. Electrons are needed to generate products via reduction of CO2. Efforts to minimize charge recombination are critical for enhancing product formation. Despite past efforts at modifying the TiO2-based catalysts using both metal and non-metal modifiers, published data shows relatively low production rates for useful products. Typical products include CO and valuable fuel products such as CH4 and CH3OH. Several of the catalysts resulted in the formation of multiple products, resulting in the need for gas separation technologies when the catalyst is implemented in a real-world scenario. Preliminary experiments in the laboratories of Professor Jean Andino at Arizona State University have shown promise for a composite catalyst of RGO-TiO2, reduced graphite oxide and titania. The RGO can potentially assist in minimizing charge recombination when TiO2 is activated by light, thereby making more electrons available for a surface CO2 reduction reaction. A potential challenge with using reduced graphite oxide is whether the interlayer spacing would be sufficient to allow TiO2 to reside between the RGO layers. A modified RGO structure with increased interlayer spacing would alleviate this concern. Moreover, if the modifier for the RGO is capable of selectively attracting CO2 as compared to hydrocarbons, then this may allow for enhanced functionality. Published data show that CO2 is strongly attracted to ionic liquids. Andino hypothesizes that an ionic liquid (IL) functionalized RGO-TiO2 would result in the attraction of CO2, sufficient charge separation within the TiO2 (making electrons available for the CO2 photoreduction reaction), and rejection of the produced hydrocarbons, such as CH4, thus reducing separation needs. Andino has performed preliminary work to synthesize the IL-RGO/TiO2 catalyst and to test the characteristics of the catalyst for the reduction of CO2 to hydrocarbons in the presence of water vapor. The DRIFTS studies showed the IL-RGO/TiO2 catalyst appears to lead to the selective and fast formation of CH4 in the absence of any CO. The CH4 production rate from CO2 photoreduction is more than 30 times higher than that which was published by any other research group. The results (taken in conjunction with literature data) suggest that the newly developed IL-RGO/TiO2 catalyst produces CH4 at a rate that is far superior to any other existing catalyst. This is an ideal basis for this EAGER award. Researchers typically use GC techniques to quantify the data and not the DRIFTS IR spectroscopy technique. Furthermore the impact of oxygen presence on product yield needs to be known. The proposed EAGER award will provide the necessary data to confirm the observation and generate additional data to support a full investigation. This EAGER is expected to have several broader impacts in the catalysis area and will broaden participation in the field. First, the data that will be generated will help to establish the usefulness of the IL-RGO/TiO2 catalyst in the direct and selective generation of a valuable fuel (CH4). This work could have significant impacts in the areas of national energy security and the control of CO2 emissions. The proposed project would be used to partially fund two traditionally underrepresented chemical engineering graduate students. The experience of working on the proposed project that has a strong connection to society?s grand challenges has already inspired these students, and is expected to help retain them in science and engineering. The expectation is that both students will make sufficient progress so that at least one peer-reviewed paper will be submitted and presentations made locally and also at annual meetings of either the American Chemical Society, the American Institute of Chemical Engineers, or the Air and Waste Management Association in 2013. |
| 学科分类 | 08 - 地球科学 |
| 资助机构 | US-NSF |
| 项目经费 | 600050 |
| 项目类型 | Continuing grant |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/75180 |
| 推荐引用方式 GB/T 7714 | John Langford.Collaborative Research: Multi-Regional Scale Aircraft Observations of Methane and Carbon Dioxide Isotopic Fluxes in the Arctic.2012. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [John Langford]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [John Langford]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [John Langford]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
