After China officially proposed the specific target of carbon reduction in 2020, efforts to promote energy-saving and emission-reduction technologies, use low-carbon or non-carbon fuels, and promote carbon trading have received unprecedented attention. The reporter interviewed related experts in this regard. They proposed that while emphasizing the source control of CO2 emissions, they should not neglect the value of CO2 resource utilization.
Wang Xianhong, a researcher at the Changchun Institute of Applied Chemistry at the Chinese Academy of Sciences, told reporters in an interview on December 25. Although carbon dioxide bioconversion and storage are currently hot topics in the field of carbon dioxide fixation and utilization, there are still many uncertainties. The use of carbon dioxide as an inexhaustible source of cheap resources and the use of chemical methods to convert it into a bulk chemical feedstock, thereby achieving the goal of turning waste into treasure, is an important way to achieve carbon reduction. The use of carbon dioxide as a carbon resource, especially the simultaneous use of carbon dioxide and carbon dioxide in carbon dioxide, is the most promising and most concerned direction in the field of carbon dioxide scale utilization.
In fact, the premise of the use of carbon dioxide is how to continuously and stably obtain carbon dioxide resources, and the technology in this area is basically mature. Jin Yong, an academician of the Chinese Academy of Engineering, said that at present, China has mastered carbon capture, separation and purification technologies, and its technology in the field of comprehensive utilization of carbon dioxide is equivalent to the world's advanced level. All of these are for China's realization of carbon dioxide resource and large-scale utilization and reduction of carbon dioxide emissions. Provides strong technical support. Wang Xianhong also believes that China's carbon dioxide capture technology is basically mature, and large-scale recovery of carbon dioxide from waste gas from cement plants, coal-fired thermal power plants, steel mills, oil refineries, and fertilizer plants can be achieved. Many domestic companies also have this aspect. Enthusiasm.
According to the reporter's understanding, various domestic waste gases with different carbon dioxide contents have already formed corresponding recovery methods, including cryogenic distillation method suitable for oil field exploitation, membrane separation method that has been used for propylene recovery industrialization equipment, and refined purification. The catalytic combustion method and the pressure swing adsorption method with low carbon dioxide content, etc. Shanghai Petrochemical Investment and Development Co., Ltd.'s Iwatani Gas Phase II carbon dioxide recovery project was put into operation a few days ago. The project utilizes carbon dioxide emissions from ethylene glycol plants, plus the original first-phase plant, producing an annual output of 75,000 tons of food grade carbon dioxide, equivalent to annual recycling. Utilize 41.25 million cubic meters of carbon dioxide under normal temperature and pressure.
Internationally, the use of carbon dioxide as a raw material for chemicals has begun to take shape. Wang Xianhong said that at present, nearly 110 million tons of carbon dioxide are chemically fixed in the world each year, and urea is the largest product of fixed carbon dioxide. The annual consumption of carbon dioxide exceeds 70 million tons; followed by inorganic carbonates, 30 million tons per year; carbon dioxide Hydrogenation to carbon monoxide has also reached 6 million tons. In addition, there are more than 20,000 tons of carbon dioxide used annually for the synthesis of intermediates such as salicylic acid and propylene carbonate.
According to reports, the synthesis of urea with carbon dioxide and ammonia is the most successful model for the fixed and utilized scale of carbon dioxide. On the basis of urea, carbon dioxide can also be used to produce important chemicals such as dimethyl carbonate. Urea is thus an effective carrier for the use of carbon dioxide. The use of carbon dioxide instead of phosgene to synthesize a series of important value-added chemical raw materials (such as dimethyl carbonate, isocyanate, methyl methacrylate, etc.) can not only achieve clean production, but also allow the reaction under mild conditions to increase the economic efficiency of the process. And security.
At present, carbon dioxide-based plastics represented by carbon dioxide and epoxide copolymers are also a hot spot. The plastics are biodegradable and help solve the "white pollution" of plastics. The industrialization technology of carbon dioxide-based plastics represented by China National Offshore Oil Corporation and Inner Mongolia Mengxi Hi-tech Group Co., Ltd. has taken the lead in the world, and has established two kiloton-class production lines.
In addition, Henan Tianguan Group has used its own catalytic system to build a pilot scale CO2 copolymer production line; the Chinese Academy of Sciences Guangzhou Institute of Chemical Technology has produced low molecular weight carbon dioxide copolymer technology has been put into production in Jiangsu Taixing, the species is Low molecular weight carbon dioxide/epoxy copolymer used as a raw material for polyurethane foams.
According to Weng Yunxuan, secretary general of the degradable plastics professional committee of China Plastics Association, the use of carbon dioxide ore source or industrial production of carbon dioxide as raw material, and propylene oxide or ethylene oxide catalytic synthesis of the polymer, is one of the main varieties of biodegradable plastics . The performance of carbon dioxide copolymer is similar to that of polyethylene. It can be used for blown film and injection molding. The product has a certain degree of transparency. Many properties can be complemented with polylactic acid and other biodegradable plastics, and the barrier properties are superior to polyethylene by more than several times. And the production cost is relatively low. After the disadvantages of low glass transition temperature and poor heat resistance are overcome, the prospects of this biodegradable plastics industry are promising.
To this end, Weng Yunxuan suggested that the relevant national authorities establish a project fund of 80 million yuan to support the research and development of key technologies for the industrialization of related companies. The company will then raise more than twice the funds for the construction of industrial scale plants, and set up 2 to 3 Demonstration production line. At present, the investment in several projects that have already been implemented is not large, and they are all below 30 million yuan.
The relevant person in charge of the China Petroleum and Chemical Industry Association revealed to reporters that the association is conducting a thorough investigation of the carbon dioxide emissions and recycling of the petrochemical industry, and that the comprehensive utilization of carbon dioxide resources is gradually opening its doors.
Wang Xianhong, a researcher at the Changchun Institute of Applied Chemistry at the Chinese Academy of Sciences, told reporters in an interview on December 25. Although carbon dioxide bioconversion and storage are currently hot topics in the field of carbon dioxide fixation and utilization, there are still many uncertainties. The use of carbon dioxide as an inexhaustible source of cheap resources and the use of chemical methods to convert it into a bulk chemical feedstock, thereby achieving the goal of turning waste into treasure, is an important way to achieve carbon reduction. The use of carbon dioxide as a carbon resource, especially the simultaneous use of carbon dioxide and carbon dioxide in carbon dioxide, is the most promising and most concerned direction in the field of carbon dioxide scale utilization.
In fact, the premise of the use of carbon dioxide is how to continuously and stably obtain carbon dioxide resources, and the technology in this area is basically mature. Jin Yong, an academician of the Chinese Academy of Engineering, said that at present, China has mastered carbon capture, separation and purification technologies, and its technology in the field of comprehensive utilization of carbon dioxide is equivalent to the world's advanced level. All of these are for China's realization of carbon dioxide resource and large-scale utilization and reduction of carbon dioxide emissions. Provides strong technical support. Wang Xianhong also believes that China's carbon dioxide capture technology is basically mature, and large-scale recovery of carbon dioxide from waste gas from cement plants, coal-fired thermal power plants, steel mills, oil refineries, and fertilizer plants can be achieved. Many domestic companies also have this aspect. Enthusiasm.
According to the reporter's understanding, various domestic waste gases with different carbon dioxide contents have already formed corresponding recovery methods, including cryogenic distillation method suitable for oil field exploitation, membrane separation method that has been used for propylene recovery industrialization equipment, and refined purification. The catalytic combustion method and the pressure swing adsorption method with low carbon dioxide content, etc. Shanghai Petrochemical Investment and Development Co., Ltd.'s Iwatani Gas Phase II carbon dioxide recovery project was put into operation a few days ago. The project utilizes carbon dioxide emissions from ethylene glycol plants, plus the original first-phase plant, producing an annual output of 75,000 tons of food grade carbon dioxide, equivalent to annual recycling. Utilize 41.25 million cubic meters of carbon dioxide under normal temperature and pressure.
Internationally, the use of carbon dioxide as a raw material for chemicals has begun to take shape. Wang Xianhong said that at present, nearly 110 million tons of carbon dioxide are chemically fixed in the world each year, and urea is the largest product of fixed carbon dioxide. The annual consumption of carbon dioxide exceeds 70 million tons; followed by inorganic carbonates, 30 million tons per year; carbon dioxide Hydrogenation to carbon monoxide has also reached 6 million tons. In addition, there are more than 20,000 tons of carbon dioxide used annually for the synthesis of intermediates such as salicylic acid and propylene carbonate.
According to reports, the synthesis of urea with carbon dioxide and ammonia is the most successful model for the fixed and utilized scale of carbon dioxide. On the basis of urea, carbon dioxide can also be used to produce important chemicals such as dimethyl carbonate. Urea is thus an effective carrier for the use of carbon dioxide. The use of carbon dioxide instead of phosgene to synthesize a series of important value-added chemical raw materials (such as dimethyl carbonate, isocyanate, methyl methacrylate, etc.) can not only achieve clean production, but also allow the reaction under mild conditions to increase the economic efficiency of the process. And security.
At present, carbon dioxide-based plastics represented by carbon dioxide and epoxide copolymers are also a hot spot. The plastics are biodegradable and help solve the "white pollution" of plastics. The industrialization technology of carbon dioxide-based plastics represented by China National Offshore Oil Corporation and Inner Mongolia Mengxi Hi-tech Group Co., Ltd. has taken the lead in the world, and has established two kiloton-class production lines.
In addition, Henan Tianguan Group has used its own catalytic system to build a pilot scale CO2 copolymer production line; the Chinese Academy of Sciences Guangzhou Institute of Chemical Technology has produced low molecular weight carbon dioxide copolymer technology has been put into production in Jiangsu Taixing, the species is Low molecular weight carbon dioxide/epoxy copolymer used as a raw material for polyurethane foams.
According to Weng Yunxuan, secretary general of the degradable plastics professional committee of China Plastics Association, the use of carbon dioxide ore source or industrial production of carbon dioxide as raw material, and propylene oxide or ethylene oxide catalytic synthesis of the polymer, is one of the main varieties of biodegradable plastics . The performance of carbon dioxide copolymer is similar to that of polyethylene. It can be used for blown film and injection molding. The product has a certain degree of transparency. Many properties can be complemented with polylactic acid and other biodegradable plastics, and the barrier properties are superior to polyethylene by more than several times. And the production cost is relatively low. After the disadvantages of low glass transition temperature and poor heat resistance are overcome, the prospects of this biodegradable plastics industry are promising.
To this end, Weng Yunxuan suggested that the relevant national authorities establish a project fund of 80 million yuan to support the research and development of key technologies for the industrialization of related companies. The company will then raise more than twice the funds for the construction of industrial scale plants, and set up 2 to 3 Demonstration production line. At present, the investment in several projects that have already been implemented is not large, and they are all below 30 million yuan.
The relevant person in charge of the China Petroleum and Chemical Industry Association revealed to reporters that the association is conducting a thorough investigation of the carbon dioxide emissions and recycling of the petrochemical industry, and that the comprehensive utilization of carbon dioxide resources is gradually opening its doors.
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