Dynamic Photo-Switching in MetalOrganic Frameworks as a Route to Low-Energy Carbon Dioxide Capture and Release
Dynamic Photo-Switching in MetalOrganic Frameworks as a Route to Low-Energy Carbon Dioxide Capture and Release
复制标题
DOI：
10.1002/anie.201206359
复制
发表时间：
2013-01-01
影响因子：
16.6
通讯作者：
Hill, Matthew R.
中科院分区：
文献类型：
--
作者：
Lyndon, Richelle;Konstas, Kristina;Hill, Matthew R.
为了使燃烧后二氧化碳捕获技术实现广泛的可行性，必须大幅降低能源成本。目前依赖于压力、温度或真空摆动的吸附剂技术消耗了发电厂多达40%的生产能力，其中大部分与从捕获介质中释放CO2有关。[1]最终，必须使该损失或寄生能量负载更接近约4%的热力学最小值，以避免过高的成本增加。[2]考虑到释放吸附的二氧化碳的触发器，如真空和加热，是如此的能源密集型，[1a，3]需要来自发电厂的能量，有强烈的动机开发新的释放触发器，不需要来自工厂的额外能量，使用可再生能源，如太阳。与此同时，与传统的高能耗CO2气体分离工艺相比，具有最大气体吸附效率的吸附剂可以进一步降低成本。光，特别是集中的阳光，是触发CO2释放的极具吸引力的刺激因素。如果与强烈吸收太阳光并伴随大量CO2解吸的吸附剂材料一起使用，则可以大幅降低能源成本。也许最有吸引力的吸附剂候选者是金属有机框架（MOF），因为它们的大吸附容量，[4]以及在孔结构内掺入光响应有机基团的潜力。[4c M0F是一类重要的3D结晶多孔材料。
For post-combustion carbon dioxide capture technology to realize widespread viability, the energy costs must be drastically reduced. Current adsorbent technologies that rely on pressure, temperature, or vacuum swings consume as much as 40% of the production capacity of a power plant, most of which is associated with the liberation of CO2 from the capture medium.[1] Ultimately this penalty, or parasitic energy load, must be brought closer to the thermodynamic minimum of about 4% to avoid prohibitive cost increases.[2] Given that the triggers for release of adsorbed carbon dioxide, such as vacuum and heating, are so energy intensive,[1a, 3] requiring energy from the power plant, there is strong motivation to develop new release triggers that do not require extra energy from the plant, using renewable energy sources such as the sun. In conjunction with this, adsorbents with maximum gas sorption efficiency can further reduce the costs compared to the conventional energy-intensive CO2 gas separation process.Light, and in particular concentrated sunlight, is an extremely attractive stimulus for triggering CO2 release. If used with an adsorbent material that strongly absorbs sunlight concomitant with the desorption of large amounts of CO2, it may be possible to drastically reduce the energy costs. Perhaps the most attractive adsorbent candidates are metal–organic frameworks (MOFs), because of their large adsorption capacities,[4] and the potential for incorporation of light-responsive organic groups within the pore structure.[4c, 5] MOFs are an important class of 3D crystalline porous