Pilot Plant for Synthesizing DMF of Utilization of Thousand Tons of Carbon Dioxide
The team of academicians Ding Kuiling from the State Key Laboratory of Metal Organic Chemistry researched an innovative new method for the catalytic conversion of carbon dioxide-from carbon dioxide to "universal solvent" N, N-dimethylformamide (DMF). On August 6, the "CO2 resource utilization and synthesis of DMF complete technology, process and equipment" project passed the scientific and technological achievements appraisal of the expert committee attended by academicians He Mingyuan, Zhou Qilin and Xi Zhenfeng in Beijing. Experts unanimously believe that "this achievement is an international initiative, and the overall technology ranks in the international advanced level."
"The implementation of this project will be the world's first industrialization process from carbon dioxide raw materials to DMF." Tang Yong, academician of the Chinese Academy of Sciences and director of the Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, told the China Science Journal.
Based on years of research accumulation in catalytic hydrogenation, Ding Kuiling led the team through the development of new metal organic catalysts to achieve the use of carbon dioxide as a "carbon resource" under mild conditions, chemical conversion to produce methanol, DMF and other common chemical raw materials, for The resource utilization of carbon dioxide provides a "green chemistry" solution.
The technology was jointly developed by Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai Zhongke Green Carbon Chemical Technology Co., Ltd. and Shandong Weijiao Holding Group Co., Ltd. The new process uses carbon dioxide, hydrogen and dimethylamine as raw materials. Researchers have developed a new catalyst system, complete sets of new technologies and new equipment for the catalytic conversion of carbon dioxide to DMF. A pilot plant of 1,000 tons / year has been built. The plant has been operating steadily for more than 1200 hours.
The 72-hour assessment results organized by the China Petrochemical Federation show that the operation is stable, the product purity is higher than 99.5%, the selectivity is greater than 99.97%, the single-pass conversion rate is higher than 59%, the catalyst consumption per ton of product is less than 0.65 grams, and dimethylamine is 640.42 kg. , Hydrogen 320.1 standard, carbon dioxide 331.7 standard.
According to reports, through the study of the catalytic mechanism and the molecular design of the catalyst, the researchers have broken through the limitations of the homogeneous catalyst's selectivity, activity and stability, and reformed the traditional process using carbon monoxide as the raw material. The core technology has applied for international patents and entered the United States, Europe and Japan.
Experts believe that the design of the reactor and key equipment of this project is innovative. According to the "two fast and one slow" process of the catalytic reaction and the cascade characteristics, the researchers innovatively proposed the design concept of the reactor coupled with jet and bubbling, and developed a new type of homogeneous catalytic reactor core equipment; for two exotherms With the characteristics of fast response, a high-precision temperature control system has been developed; units and systems such as de-lighting, dehydration, refining, and safety management and control have been integrated to achieve flexible control, safe and stable operation of processes and devices.
At the same time, the technical process route is reasonable and efficient. The new process has mild reaction conditions and a green process; it has high energy efficiency and a conversion efficiency of 53.8%; the comprehensive energy consumption per ton of product is 0.3064 tons of standard coal, and the exhaust gas emissions per ton of product is 6.67 square meters. No solid waste is generated, and zero wastewater discharge can be achieved.
The appraisal committee believes that the completion of the world's first 1,000-ton pilot plant has opened up a new way for the utilization of carbon dioxide. Compared with the current industrial technology that uses carbon monoxide as raw material, the new route has lower raw material cost and abundant sources, and the emission of three wastes has been greatly reduced. For industries and companies that surplus hydrogen and carbon dioxide, not only can they generate significant economic benefits, but they can also reduce carbon dioxide emissions, adding an option to extend the industrial chain and increase competitiveness. (Reporter Huang Xin)
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