TOMSK, Apr 26 – RIA Tomsk. Employees of Tomsk Polytechnic University (TPU) found out that wheat bran in combination with additives can be used as fuel, which will reduce the level of greenhouse gases and reduce the number of landfills, the press service of the university said on Monday.
“Various types of biomass are increasingly used as fuel, for example, agricultural waste. Scientists studied wheat bran of one of the milling enterprises in Siberia and found that they belong to low-melting fuels. The mineral part of wheat bran is sintered at temperatures above 675 degrees, which is much lower than the temperature in the boiler," the press service said.
According to the scientists, such a melting temperature is due to the high content of potassium in the bran. However, for the same reason, when biomass is burned, it forms a glassy coating of ash and slag, removing which can damage the heating surface, which will reduce heat transfer, reliability of operation and boiler performance.
To find out how the mineral part contained in the bran affects the combustion process, scientists divided the samples into four fractions and found that two of them - with a high calcium content - form a crumbly mass when burned.
© РИА Томск. Елена Тайлашева
“The key factor affecting the sintering of bran ash is the ratio of calcium to high potassium content. Experiments were conducted to confirm this: calcium carbonate was added to the bran, and after combustion the ash residue had a crumbly powdery appearance. This suggests that when this mixture is burned, cleaning of heating surfaces will occur without much difficulty," an engineer of the TPU Butakov Research Center Kanipa Ibrayeva is quoted.
According to scientists, burning low-melting biomass with calcium carbonate will reduce operating costs, and fuels from various types of biomass will help reduce greenhouse gases and reduce the number of landfills. The research results are published in the journal Fuel.
Earlier it was reported that TPU scientists have already developed several options for creating fuel from production waste. For example, researchers have figured out how to create gasoline from the by-products of gas companies. They also developed a technology that allows to recycle old car tires and get from them liquid fuel that does not freeze at minus 50 degrees.