ANALYSIS OF TECHNOLOGIES FOR DESULFURIZATION OF COKING FEEDSTOCK AND PETROLEUM COKE

Abstract

In this article, the authors provide an overview of the properties of petroleum coke produced by  «POCR» LLP, as well as calcined coke from «UPNK-PV» LLP, and the properties of coke required by the aluminum industry. Based on the presented data, an analysis of desulfurization technologies for petroleum coke and coking feedstock with maximum sulfur removal is conducted. Petroleum coke production is one of the directions for deepening oil refining. Currently, there is a trend toward declining oil quality, particularly with an increase in sulfur content. The elevated sulfur content in coking feedstock worsens the quality of petroleum coke and limits its use in electrode production. The burning of high-sulfur coke in furnaces leads to equipment corrosion and the release of sulfur gases into the atmosphere, resulting in environmental problems. In one of the primary applications of petroleum coke in the aluminum industry, the sulfur content requirement is 1.5 %, whereas petroleum coke from «POCR» LLP contains 2.5-3.5 % sulfur. To improve the quality of raw petroleum coke, «POCR» LLP utilizes calcination at «UPNK-PV» LLP, which enhances the structural and mechanical properties of the coke but only slightly reduces the sulfur content. The article discusses various methods for desulfurizing coking feedstock and petroleum coke, including calcination, hydrotreating, extraction, oxidative desulfurization, microbial desulfurization, and provides a comparative analysis of these methods. The most effective desulfurization method is also proposed based on the review.