Study On Characteristics Of Catalytic Gasification Of Jin Shan Petroleum Coke

Because of an increasing output of petroleum coke, how to effectively use petroleum coke has become an urgent problem. With the same chemical composition of petroleum coke and coal, it is a possible way to use petroleum coke by gasification. But the reactivity of petroleum coke is low, so it is important to choose the suitable gasification catalyst which not only improves the reactivity of petroleum coke, but also controls the composition of gas products.In this paper, we took Jin Shan petroleum coke as the research object and added different doses of K2CO3in the petroleum coke by volumetric impregnation method. First, steam catalytic gasification of petroleum coke was performed using a laboratory fix-bed reactor with an online coal gas analyzer. The experimental results show that catalytic gasification not only effectively promotes the gasification reactivity, but also contributes to high H2and little CH4. The release characteristics of CO, H2, CO2and CH4are similar in the same condition. The higher gasification temperature, the larger percentage of CO and the smaller percentage of CO2and H2. The more additive amount of K2CO3, the smaller percentage of CO and the larger percentage of CO2and H2.The yield of CO2has a positive correlation with the percentage of H2in the gas products. There is a temperature range, which not only makes petroleum coke have higher gasification reactivity, but also have a higher yield of H2.Second, the CO2catalytic gasification of petroleum coke was performed using a TGA. The experimental results show that because of a higher gasification temperature, the time at which the reaction was finished was shortened and with the more additive amount of K2CO3, the time is also shortened. At the same time, we have established a normal distribution dynamics model of CO2catalytic gasification of petroleum coke. Through the calculation results we can know, the reaction activation energy significantly reduced after adding K2CO3. The more additive amount of K2CO3, the lower reaction activation energy. What’s more, the CO2catalytic gasification of petroleum coke has obvious kinetic compensation effect.At last, we use Fourier-transfclrill infrared (FTIR) analyzer and Specific surface area and pore size analyzer to study the two petroleum coke samples after high-heat treatment. Chemical groups of N2coke and H2O coke surfaces were analyzed by Fourier-transfclrill infrared (FTIR) analyzer. The results show that, compare with petroleum coke, chemical groups of N2coke and H2O coke surfaces have significant changes, and what’s more, chemical groups of H2O coke surfaces are more abundant than N2coke.In addition, we find that pore structural parameters of N2coke and H2O coke are greater than petroleum coke, especially, H2O coke has much greater specific surface area and more abundant microcellular structure. When the gasification temperature is higher, no matter N2coke or H2O coke, the time at which the reaction was finished was shortened. The reactivity index of H2O coke is greater than N2coke in the same conditions. The release of CO, H2, and CO2in H2O coke is faster than N2coke. The gas release characteristics of the two cokes are similar to petroleum coke’s. In addition, there is no significant change in gas product composition between N2coke and H2O coke.