How to utilize 1.5 billion tons of carbon dioxide?
Thread Content
In 2008, cement enterprises above a certain scale produced 1.388 billion tons of cement throughout the year, while the actual production in 2009 is estimated to have been around 1.5 billion tons. Producing 1 ton of clinker requires 0.161–0.296 tons of coal, and the combustion of coal generates 0.383–0.704 tons of CO2. Including the CO2 produced by the decomposition of calcium carbonate during clinker formation, 0.894–1.215 tons of CO2 are emitted per ton of cement clinker produced. On average, about 1 t of CO2 is emitted for every 1 t of cement clinker produced. Based on this calculation, in 2009 China produced 1.5 billion tons of cement clinker, resulting in more than 1.5 billion tons of CO2 being released into the atmosphere. At present, there are only emission reduction measures: using materials containing CaO that do not produce CO2 as raw materials ； While ensuring the performance of cement clinker, reducing the CaO content in its chemical composition helps to decrease the amount of calcium carbonate required for its production, thereby reducing CO2 emissions. But these measures have limited potential. Taking a 5,000-ton production line as an example, the daily output of carbon dioxide exceeds 5,000 tons. With such high production levels and such concentration, do any of you sea friends have any ways to make use of this carbon dioxide?
At present, Europe and the United States are also facing difficulties in utilizing carbon dioxide; that is why there is a pursuit of sequestering carbon dioxide in the Earth’s crust. Our country is also actively seeking solutions for the utilization of carbon dioxide, but no substantial progress has been made yet.
Carbon dioxide has some uses in the production of carbonated beverages and in the chemical industry, but the amounts used are small; we are not able to handle such large quantities of carbon dioxide.
I had no idea until I did the calculations; it’s shocking to see just how much CO2 China alone emits, and there are no effective measures in place to address this – it’s truly concerning
It has many uses, but it’s not yet possible to allocate carbon dioxide systematically to specific applications; for example, the carbon dioxide in our factory is used in methanol synthesis and the transportation of pulverized coal