New achievement of Dalian Institute of chemical and physical sciences: researchers use waste beverage bottles to solve the density and sealing problems of bio aviation coal

With the continuous reduction of fossil energy reserves, the development of new organic carbon sources has become a research hotspot in the world Polyethylene terephthalate (PET) is a kind of plastic widely used because of its good mechanical and thermal properties At present, its annual output is about 50 million tons Due to the poor chemical degradation ability of PET resin, it brings some environmental problems In recent years, the recycling of waste PET resin by chemical methods has attracted people's attention At present, the reported technologies mainly focus on the degradation of PET resin into terephthalic acid (or terephthalic acid), and their further hydrogenation to produce cyclohexanedicarboxylate or cyclohexanedimethanol There is no report on the selective synthesis of fuel from waste PET resin In addition, the catalytic synthesis of lignocellulosic aviation fuel is also a way to develop new organic carbon sources At present, the synthetic lignocellulose aviation fuel reported at home and abroad is mainly composed of chain hydrocarbon in chemical structure, and its density (or volume calorific value) and rubber sealing property are lower than the traditional aviation kerosene (mixture of chain hydrocarbon, cyclohydrocarbon and aromatic hydrocarbon) In practical application, it needs to be mixed with the traditional aviation kerosene to meet the requirements of aviation fuel Recently, a new method has been developed by Li Ning, a researcher in the team of academician Zhang Tao of Dalian Institute of Chemical Physics, Chinese Academy of Sciences This method can synthesize fuels with alkanes, cyclohydrocarbons and aromatics from biomass oxygenated compounds and waste PET resin at the same time The main research strategies are shown in Figure 1 Relevant research results were published in green chemistry (DOI: 10.1039/c9gc00571d) Figure 1 Research strategy for synthesizing naphthenic and aromatic hydrocarbons in the range of gasoline and aviation kerosene from pet (source: Green chem.) Li Ning, researcher, Dalian Institute of Chemical Physics, Chinese Academy of Sciences In 1997 and 2000, he obtained his bachelor's degree and master's degree from the Department of chemistry, Jilin University; in 2004, he obtained his doctor's degree from Dalian Institute of Chemical Physics, Chinese Academy of Sciences; from 2005 to 2010, he worked as a postdoctoral student in the Institute of catalysis and environment in Lyon, France and the Department of chemistry, University of Massachusetts, USA In August 2010, he joined the team of academician Zhang Tao of Dalian Institute of Chemical Physics of Chinese Academy of Sciences as a "hundred talents plan" and mainly engaged in the research of catalytic conversion of lignocellulose into aviation fuel and energy chemicals The main contents are as follows: 1) the exploration of new routes for the synthesis of lignocellulose aviation kerosene or energy chemicals; 2) the development of cheap and efficient catalysts; 3) the research of new processes with high efficiency and integration So far, researcher Lining has published more than 80 articles in international well-known journals such as Angew Chem Int Ed., Joule, AIChE Journal, ACS Catalysis, Applied Catalysis B: Environmental, Green Chem., etc 16 authorized patents were obtained In 2015, it was awarded the title of "thousand talents level" of "ten hundred thousand" high-end talent introduction project of Liaoning Province and the title of outstanding young scientific and technological talents of Dalian city Cutting edge research achievements: to solve the problems of density and sealing of bio aviation coal with waste beverage bottle First, the pet resin waste represented by nongfushanquan purified water bottle was used as raw material to obtain dimethyl terephthalate through methanol alcoholysis reaction It is found that the reaction can take place without catalyst, and the product dimethyl terephthalate is obtained, which is solid at room temperature and has low solubility in methanol Therefore, when the reaction temperature is reduced to room temperature, it can be easily separated from methanol (Fig 2) Fig 2 The state of the product of methanol alcoholysis of PET resin after cooling to room temperature (source: Green chem.), then, in order to improve the fluidity of dimethyl terephthalate, the author also carried out hydrogenation Dimethyl 1,4-cyclohexanedicarboxylate in liquid form at room temperature was obtained under mild solvent-free conditions (Fig 3) The naphthenic and aromatic hydrocarbons in the range of gasoline or aviation kerosene can be obtained by further hydrodeoxygenation without solvent Fig 3 Dimethyl terephthalate (left) and its hydrogenation product, dimethyl 1,4-cyclohexanedicarboxylate (right) (source: Green chem.) finally, by solvent-free condition 1, The fuels containing alkanes, cycloalkanes and aromatics were successfully obtained by the simultaneous hydrodeoxidization of dimethyl 4-cyclohexanedicarboxylate and some classic precursors of biomass aviation kerosene The development of this work provides a new way to solve the environmental problems caused by waste PET resin, as well as the problems of volume calorific value and poor rubber sealing of bio aviation coal This achievement was recently published on green chemistry by Hao Tang, Ning Li, Guangyi Li, Aiqin Wang, Yu Cong, Guoliang Xu, Xiaodong Wang and Tao Zhang Reactor, fixed bed mobile phase reactor for pet alcoholysis and solvent-free hydrogenation of dimethyl terephthalate, solvent-free hydrodeoxygenation of dimethyl 1,4-cyclohexanedicarboxylate (and bio aviation coal precursor) Nowadays, people and scientific research have been paid more and more attention in the economic life China has ushered in the "node of science and technology explosion" Behind the progress of science and technology is the work of countless scientists In the field of chemistry, in the context of the pursuit of innovation driven, international cooperation has been strengthened, the influence of Returned Scholars in the field of R & D has become increasingly prominent, and many excellent research groups have emerged in China For this reason, CBG information adopts the 1 + X reporting mechanism CBG information, chembeangoapp, chembeango official microblog, CBG wechat subscription number and other platforms jointly launch the column of "people and scientific research", approach the domestic representative research group, pay attention to their research, listen to their stories, record their demeanor, and explore their scientific research spirit.