AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Low carbon footprint12/30/2023 ![]() ![]() We also meet with representatives across all political parties, engaging them in our work and securing their support. We commission research from independent experts and work with colleagues across all parts of WWF, to ensure our policy messages are promoted effectively. To do this, we develop policy evidence and advocate policy solutions to decarbonise our energy use, working in coalition with experts within WWF, other NGOs and the private sector. We do this to protect the Climate Change Act, making sure that the Government is hitting their carbon budgets. "There is still huge potential here to further reduce carbon dioxide emissions.The climate and energy team at WWF UK is at the forefront of campaigning and advocacy to drive changes in policy and legislation for carbon reduction in the UK and working to ensure that the UK government is held to account on reducing its carbon emissions. Our focus is on 3 main areas: power, transport and buildings (accounting for 84% of UK emissions). "Raw materials containing clay minerals with a lower aluminum content could be used particularly in construction projects where lower-grade concrete is sufficient," explains Pöllmann. Further research projects will now investigate whether there are also overburden sources in Germany suitable for cement production. In extensive laboratory tests, the mineralogists were able to prove that their alternative cement meets all the quality requirements placed on traditional Portland cement. By coupling these effects, CO 2 emissions can be reduced by up to two thirds during cement production. "Our method not only releases less CO 2 during the chemical conversion, but also when heating the rotary kilns", says Pöllmann. The process has another environmentally relevant advantage: the burning process only requires 1,250 degrees Celsius (2282° Fahrenheit) - 200 degrees (392° Fahrenheit) less than for Portland cement. It is also available in large quantities and can be processed without additional treatment." Another advantage: The Belterra clay has to be removed anyway, so it does not have to be extracted only for cement production.Įven though cement cannot be entirely produced without calcium carbonate, at least 50 to 60 percent of the limestone can be replaced by Belterra clay. "It contains enough minerals with an aluminum content to ensure good quality cement. ![]() "This layer of clay can be up to 30 meters thick and covers the bauxite deposits in the tropical regions of the earth, for example in the Amazon basin," explains Pöllmann. Together with Brazilian mineralogists, the MLU team has now found an alternative to the alternative, so to speak: They do not use pure bauxite, but rather an overburden: Belterra clay. However, bauxite is a sought-after raw material in aluminum production and not available in unlimited quantities. One promising solution is calcium sulphoaluminate cement, in which a large portion of the limestone is replaced by bauxite. ![]() "In the process, the calcium carbonate is converted into calcium oxide, releasing large quantities of carbon dioxide." Since CO 2 is a greenhouse gas, researchers have been looking for alternatives to Portland cement for several years. "Portland cement is traditionally made using various raw materials, including limestone, which are burned to form so-called clinker," explains Professor Herbert Pöllmann from MLU's Institute of Geosciences and Geography. Cement is not only an important building material, it is also responsible for around eight percent of manmade CO 2 emissions. According to estimates, almost 6 billion tons of cement were produced worldwide in 2020. Houses, factories, staircases, bridges, dams-none of these structures can be built without cement. ![]()
0 Comments
Read More
Leave a Reply. |