Obtaining of carbonized oil adsorbents

The adsorption method of removing spilled oil from the environment is the simplest and most convenient to implement. In this regard, oil adsorbents were obtained by carbonization of corn cobs in the temperature range of 500-700 °C. It has been shown that increasing the carbonization temperature from 500°C to 600°C and 700°C does not have a significant effect on the yield of the product, so corn cobs carbonized at 500°C were used as an adsorbent. The carbon and oxygen content in plant waste carbonized at 500°C was 91.96% and 4.45%, respectively. SEM images of carbonized adsorbents show the porous structure of materials obtained from corn cobs, the pore size reaches 5-10 μm. The adsorption capacity of carbonized corn cobs was tested using oil from the “Munaily” field in the Atyrau region, which has the following characteristics: average density 867.2 kg/m3, sulfur content 0.31 wt. %, resin 36.0 wt. % and paraffins 1.3 wt. %. The oil adsorption value on the surface of carbonized corn cobs is 8.4 g/g. The degree of oil recovery in the region of optimal oil/adsorbent mass ratios is 90-100%.