PARAMETRIC STUDIES OF SSP PRODUCTION AND MODELING OF SSP REACTION KINETICS

Somak Jyoti Sahu, Samar Samanta, Amalesh Sirkar

Abstract: Considering the present scenario of international price hike of rock phosphate and availability of raw materials it is more evident to run the plant in more economic manner for sustainability of the unit. Single Super Phosphate(SSP) is one of the main fertilizer used by farmers. As the price of high grade rock phosphates is very high, it is needed to run the unit with low grade rock phosphates. The conversion of rock phosphate consists two steps. The 2nd reaction is basically a slow reaction because the free H3PO4 has to diffuse inside the solid mass to react with unreacted P2O5 in the rock and the unreacted DCP to produce MCP. The rate constant appears to increase with increased acid rock ratio upto 0.64 because a higher acid rock ratio means higher H3PO4 concentration and hence diffusion rate will be higher. Therefore, rate constant is correlated to acid rock ratio. From the experimental data it is found that 0.64 acid rock ratio gives highest yield of MCP. Rate of reaction during first 6 days appear to be much higher than during rest of the days. These may be due to the reason that the actual reaction is more complex involving in several steps before achieving the final product

Keywords: SSP, Acid Rock Ratio, Mixer-Cum-Reactor, Kinetics, and MCP

DOI: https://doi.org/10.15623/ijret.2016.0513006