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Turning carbon dioxide into gasoline is even more amazing than turning water into oil!

2017-05-09View Original

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The editor has learned from the Chinese Academy of Sciences that a team of researchers led by Sun Jian and Ge Qingjie from the Dalian Institute of Chemical Physics of the CAS has discovered a new process for the efficient conversion of CO2. They also developed a novel Na-Fe3O4/HZSM-5 multifunctional composite catalyst, which enabled the direct hydrogenation of carbon dioxide (CO2) to produce high-octane gasoline for the first time. Multiple invention patents have been filed for this process and the catalytic materials involved. The research findings were published on the 2nd in the British academic journal Nature Communications, and were described as a \"breakthrough in the field of CO2 catalytic conversion.\" Carbon dioxide hydrogenation “turned into” gasoline. Nature Communications is the third-most influential multidisciplinary journal in the world, second only to Nature and Science. When it was founded in 2010, the journal was a hybrid publication that published papers in both open-access and subscription formats, receiving around 1,500 submissions per month. All scientific research published in this journal represents significant advances in a particular field, covering disciplines such as biology, physics, chemistry, and earth sciences. Challenge: Activation and selective conversion of CO2. In nature, plants absorb CO2 from the air and convert it into organic compounds and oxygen through photosynthesis; this process is slow, which is why chemists have been striving to recover and utilize CO2 through chemical methods. If gasoline is produced using CO2 as a raw material, it would represent a clean energy strategy that could serve as a potential alternative to fossil fuels; it would not only help reduce the greenhouse effect caused by CO2 but also lessen dependence on traditional fossil fuels. Turning carbon dioxide into gasoline is even more amazing than turning water into oil! Scientists explain that using CO2 as a raw material to produce gasoline is a potential clean energy strategy as an alternative to fossil fuels, but the activation and selective conversion of CO2 pose challenges. Sun Jian said, “Compared to its more reactive ‘twin brother’, carbon monoxide, carbon dioxide molecules are very stable and difficult to activate. Compared with the traditional Fischer-Tropsch synthesis route, the catalytic reaction of CO2 with hydrogen molecules tends to produce small molecular compounds such as methane, methanol, and formic acid, rather than long-chain liquid hydrocarbon fuels.” ” Technical advantages: According to a report by Science Network on May 3, to address this issue, the research team developed an efficient and stable Na-Fe3O4/HZSM-5 multifunctional composite catalyst. Sun Jian explained that this catalyst has three advantages: First, under conditions close to those of industrial production, it achieves low selectivity for methane and carbon monoxide; the selectivity for gasoline-range hydrocarbons (C5-C11) among the hydrocarbon products reaches 78%, which is advantageous for large-scale production ; Secondly, the gasoline produced by this method meets environmental regulations; its components are mainly high-octane isoparaffins and aromatics, which essentially satisfy the requirements set by the National V standard regarding the composition of benzene, aromatics, and olefins ; Thirdly, this catalyst also possesses good stability, enabling it to operate continuously and stably for over 1,000 hours, which indicates potential application prospects. Furthermore, studies on the reaction pathways for the direct conversion of CO2 into gasoline show that precise control over the multi-active site structure and its pro*mity effect is key to achieving the hydrogenation of CO2 to produce gasoline. This technology not only opens up new avenues for research on the hydrogenation of CO2 to produce liquid fuels, but also provides new ways to utilize intermittent renewable energy sources (wind, solar, hydroelectric, etc.).
Reply #22017-05-09
What are people’s thoughts on this technological breakthrough? Let me start by sharing my opinion: CO2 and hydrogen are used, with the help of a catalyst, to produce gasoline. From the perspective of energy conservation, the process of converting CO2 and hydrogen into gasoline requires heat energy; this heat energy transforms CO2 and hydrogen into chemical energy in the form of gasoline (with molecular weights ranging from C5 to C11). Moreover, the efficiency of converting heat energy into chemical energy is not 100%. The heat required for the synthesis of CO2 and hydrogen still has to be obtained by emitting CO2; whether this heat is generated by burning chemical ores or through electric heating, CO2 must be emitted in either case. Then, after thermal energy is converted into chemical energy, it burns again, producing CO2 once more; that CO2 is then used to synthesize gasoline. It’s as if CO2, throughout the entire cycle, is merely a carrier of energy, and it cannot actually utilize and convert all of the CO2 in the atmosphere. When I saw this, my first thought was that it could effectively reduce the level of greenhouse gases in the atmosphere. But upon further consideration, I realized that maybe I had misunderstood it; it may not actually reduce the amount of greenhouse gases in the atmosphere, but only slows down the rate at which their levels increase.
Reply #32017-05-09
The technology of converting carbon dioxide into hydrocarbons through hydrogenation can only be practical if hydrogen can be obtained at extremely low cost. Those who do not understand chemical thermodynamics and kinetics become excited at the mere mention of reducing carbon dioxide emissions; such behavior is a sign of ignorance.
Reply #42017-05-09
This post was last edited by chenjin0608 on 2017-5-9 at 15:22. Again, according to the law of conservation of energy, the energy required to convert carbon dioxide into gasoline is equal to the energy released when it burns or is converted back into carbon dioxide. Even looking at it this way brings no benefit. Moreover, industrial production cannot achieve 100% energy conversion
Reply #52017-05-09
This post was last edited by chenjin0608 on 2017-5-9 at 15:23. So, turning carbon dioxide into gasoline seems like a joke to me, unless large amounts of natural energy sources (wind, solar, geothermal) can be used for the conversion process
Reply #62017-05-09
Solving the H2 source issue is key; it would be even better if photocatalytic catalysts could be developed!
Reply #72017-05-09
Whether it is the energy required for synthesizing oil from CO2 or the energy needed for hydrogen production, it must be obtained by emitting CO2. In this context, in terms of CO2 consumption, it may not have any effect on reducing greenhouse gas emissions.
Reply #82017-05-09
This is definitely amazing – it can use carbon dioxide as a raw material; it seems Earth will be saved
Reply #92017-05-10
Which one would do this? :Well, this topic was chosen as there really was no other option; it starts with carbon dioxide, and after being burned, it turns back into carbon dioxide. Is no energy required for this process? Won’t it still result in more carbon dioxide emissions? If you have that free time, isn’t it better to just burn hydrogen?
Reply #102017-05-10
Thinking differently, as a form of energy storage, since solar and wind power generation is unstable and the power grid is reluctant to accept such electricity, it’s suitable for use in this process

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