Removal of vanadium, potassium and iron from spent vanadium catalyst by leaching with citric acid at atmospheric pressure

Krzysztof Mazurek

doi:10.2478/pjct-2014-0010

Abstract

Abstract The effect of time, temperature, the catalyst particle size and the ratio of the catalyst weight to the leaching solution volume (S:L) on the treatment of spent vanadium catalyst components was determined using citric acid solutions at atmospheric pressure. The optimal parameters of catalyst leaching in 10% acid solutions at atmospheric pressure are: T = 323 K, t = 4 h, the particle size of less than 0.160 mm, the S:L ratio below 0.1. Under these conditions it was possible to dissolve about 90% of vanadium and potassium compounds and more than 60% of iron compounds contained in the catalyst. These results fall within the scope of research on a comprehensive method for recovering spent vanadium catalyst components.

Highlights

In view of the on-going depletion of natural resources and increasing environmental pollution, industrial waste has become a valuable source of raw material acquisition[1,2,3,4,5,6,7]
The main challenge of the current generation is a sustainable development aimed at reducing the negative impact on the natural environment while maximizing process efficiencies. This involves the concept of recycling, i.e. the use of resources that were previously considered as waste and that can become a valuable source of raw materials and energy
Citric acid solutions can be successfully used for leaching active phase components from a vanadium catalyst

Summary

Krzysztof Mazurek

The effect of time, temperature, the catalyst particle size and the ratio of the catalyst weight to the leaching solution volume (S:L) on the treatment of spent vanadium catalyst components was determined using citric acid solutions at atmospheric pressure. The optimal parameters of catalyst leaching in 10% acid solutions at atmospheric pressure are: T = 323 K, t = 4 h, the particle size of less than 0.160 mm, the S:L ratio below 0.1. Under these conditions it was possible to dissolve about 90% of vanadium and potassium compounds and more than 60% of iron compounds contained in the catalyst.

INTRODUCTION

EXPERIMENTAL SECTION

RESULTS AND DISCUSSION

CONCLUSION

LITERATURE CITED