High-energy fuels are very important when it is necessary to minimize the weight of fuel. There is a compound of terpenes extracted from trees that dimerizes to produce terpene dimers and has demonstrated energy density comparable to aviation fuel JP-10. Scientists from the Georgia Institute of Technology and the Joint BioEnergy Research Institute have genetically engineered bacteria to allow them to synthesize terpenes, which is expected to replace JP-10 in missile launches and other aviation fields. Refinement of JP-10 from oil is limited. In the future, biofuels are expected to make up for their deficiencies and even promote the development of a new generation of engines. Related research was published in the recent edition of the Synthetic Biology of the American Chemical Society (ACS).
According to the report of the Physicist Organization Network on March 26th, at the preliminary stage of the bioengineering research, the first author of the paper, Georgia Tech graduate student Stephen Sharia, was the associate professor of the school, Pamela Perata-Yaia. Under the guidance, the production of terpene has been increased by 6 times. They are studying alternative enzymes, which are inserted into E. coli to produce terpenes. The enzymes that have been selected fall into two categories: three kinds of PS (terpene synthase) and three kinds of GPP (germyl diphosphate synthase). Experiment to find the best combination to get the highest yield. At present, they have increased production to 32 mg/l. But to compete with JP-10, which is from oil, production will increase 26-fold, Perata-Yaia said, but this is also within the scope of bioengineering E. coli.
Peratar-Yaiya believes that the current obstacle lies in a suppression process within the system. "We found that it was the enzyme that was inhibited by the matrix. This inhibition depends on the concentration," she said. "What we need at the moment is an enzyme that will not be inhibited in high-strength matrices, or to maintain low substrate concentrations throughout the reaction." Both methods are more difficult, but they are not insurmountable."
The JP-10 that can be extracted from a barrel of oil is limited, and the tree extract does not help much. The shortage of supply makes the price of JP-10 about 25 cents/gallon, so the production of high-energy biofuel substitutes is better than producing gasoline or Diesel alternatives have an advantage. "If you study gasoline alternatives, you have to compete with 3 cents/gallon, which requires a long-term optimization process." Perata-Yaia said, "And we are competing with 25 cents per gallon and we need to The time is shorter."
"Although we are still at the level of a few milligrams per liter, because the alternatives we study have a higher value than diesel or gasoline alternatives, it means we are closer to the target," she said. In theory, it is possible to make the cost of producing terpenes lower than that of oil refining. If the final biofuels perform well, it will open a new door for light, high-energy engine fuels and increase the supply of high-energy fuels.
"We're manufacturing a sustainable, high-energy-density strategic fuel, but it's still in its early form," said Perata-Yaiaa. "We're concentrating on creating a 'trial' fuel that looks like Same as fuel from oil to adapt to current sales system.†(Chang Lijun)
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