Does anyone have documents related to CO2 capture and reuse?

Energy experts predict that by 2030, global carbon dioxide (CO2) emissions could exceed 38 billion tons, and the resulting greenhouse effect will pose a serious threat to human survival. However, from another perspective, CO2 is a rather valuable resource in the chemical industry. Although the global utilization of CO2 is currently less than 100 million tons, new ways of turning waste CO2 into useful resources are attracting increasing attention. Currently, about 40% of the globally recycled CO2 is used in the production of chemicals, 35% in enhanced oil recovery, 10% in refrigeration, 5% in carbonated beverages, and 10% for other applications. Food-grade CO2 is developing rapidly. In recent years, food-grade CO2 has seen rapid growth, particularly showing active use in the fields of preservation and freshness maintenance for beverages and beer, tobacco, vegetables, and other products. The beverage and beer industry is the largest consumer of food-grade CO2; currently, compared to developed countries around the world, China’s consumption level of CO2 in this sector is extremely low. According to data provided by The Coca-Cola Company in the United States, China’s annual per capita consumption of beverages is only 1/25 of that in the U.S., which indicates huge potential for growth in this market. The tobacco industry is gradually replacing Freon with food-grade CO2 for tobacco leaf expansion, which also creates excellent opportunities for the use of food-grade CO2. Tobacco shreds expanded using food-grade CO2 not only have superior quality, but also allow for a savings of nearly 3 kilograms of tobacco raw material per box of cigarettes. In recent years, many cigarette factories in China have replaced their original Freon expansion equipment with CO2 expansion equipment. New technologies give rise to new approaches. Supercritical CO2 extraction technology has made breakthrough advances in fields such as traditional Chinese medicine, food, fragrances, petrochemicals, biochemistry, and environmental chemistry. As a new type of low-cost and easily separable extraction technique, this technology will become increasingly popular. The Guangming Chemical Research and Design Institute has developed a watermark-free dyeing technology using supercritical CO2, with various performance indicators in the pilot scale reaching those of traditional processes. The application of this technology will play an important role in reducing the high pollution levels in the printing and dyeing industry as well as in conserving water resources. It is expected that this technology will be able to be put into industrial use within two years. Linde Gas, a manufacturer of industrial gases, has introduced a new dry cleaning method that uses CO2-based cleaning technology, bringing green chemistry into the laundry industry. This technology pressurizes CO2 to liquefy it, then mixes it with detergents and enhancers before adding it to the clothes in a rotating washing chamber. Dirt is separated through distillation, and CO2 can be recovered for reuse. The market for chemical production is enormous. Driven by strong market demand and a supply gap, some large and medium-sized ammonia synthesis enterprises in the country have started to use excess CO2 to produce propylene carbonate. Shangcai Junma Guangjian Chemical Company in Henan Province uses a new clean production process developed by the Organic Chemistry Research Institute of the Shanghai Institute of Chemical Technology, which involves the direct synthesis of propylene carbonate from CO2 waste gas at near-critical conditions and propylene oxide. By utilizing the excess CO2 generated in fertilizer production for this purpose, it is possible to save 40% on steam usage, 65% on electricity consumption, and 60% on water usage; in addition, equipment investment can be reduced by more than 30%. Dimethyl carbonate is an environmentally friendly and green chemical product that has received widespread attention at home and abroad in recent years. In our country, CO2 is used as the raw material, and reaction distillation transesterification technology is employed; this approach features a short process flow, very high product purity, with conversion rates, selectivity, and yields all approaching 100%. The Shanghai Chemical Engineering Design Institute uses coke as a raw material and CO2 as a gasifying agent to produce crude CO gas through reduction. This crude CO gas is then purified using a combined system to yield high-purity CO gas. For a CO plant with a capacity of 10,000 cubic meters per hour, using CO2 as the gasifying agent can save 13,440 tons of standard coal per year. Kansai Electric Power Company and Mitsubishi Heavy Industries are developing new methods for producing dimethyl ether from CO2 and H2, by reacting CO2 and H2 captured from industrial facilities to produce methanol, which is then dehydrated to yield dimethyl ether. CO2-based polymers are making their debut. As environmentally friendly and high-tech products, CO2-degradable plastics are becoming a hot topic in research and development around the world today. China’s current absolute advantage in the research and development of CO2-based polymers provides an excellent opportunity for their industrial development. Such products can not only convert industrial waste gas CO2 into environmentally friendly biodegradable plastics, but also avoid the secondary environmental pollution caused by traditional plastic products. The technology for extracting CO2 from cement kiln exhaust gases and using it as a raw material in the production of fully biodegradable plastics – a wholly biodegradable CO2 copolymer technology with independent intellectual property rights and the first of its kind in China – has been developed by Inner Mongolia Mengxi High-Tech Group and put into practical use. The CO2-degradable plastic project, jointly funded by CNOOC and the Changchun Institute of Applied Chemistry under the Chinese Academy of Sciences, commenced construction in Dongfang City, Hainan Province, at the beginning of August 2007. This project will open up an important pathway for the large-scale utilization of CO2, facilitate the development and use of upstream gas fields, and reduce the concentrated emission of CO2.

Reply to 2# cordone: Could you tell me the source?

http://www.cqvip.com/QK/81712X/2007011/26015370.html

The original poster must have participated in the Mitsui competition; this topic is quite new and challenging

Reply to 4# cordone: Thank you!

Reply to 5# simonzrh: Yes, the competition already involves a lot of elements, and with an additional relatively new event, it becomes a bit more challenging