Carbon disulfide removal from gasoline fraction using zinc-carbon composite synthesized using microwave-assisted homogenous precipitation

Abstract

Carbon disulfide (CS2) is one of the sulfur components that are naturally present in petroleum fractions. Its presence causes corrosion issues in the fuel facilities and deactivates the catalysts in the petrochemical processes. It is a hazardous component that negatively impacts the environment and public health due to its toxicity. This study used zinc-carbon (ZC) composite as a CS2 adsorbent from the gasoline fraction model component. The carbon is derived from date stone biomass. The ZC composite was prepared via a homogenous precipitation process by urea hydrolysis. The physicochemical properties of the prepared adsorbent are characterized using different techniques. The results confirm the loading of zinc oxide/hydroxide carbonate and urea-derived species on the carbon surface. The results were compared by the parent samples, raw carbon, and zinc hydroxide prepared by conventional and homogeneous precipitation. The CS2 adsorption process was performed using a batch system at atmospheric pressure. The effects of adsorbent dosage and adsorption temperatures have been examined. The results indicate that ZC has the highest CS2 adsorption capacity (124.3 mg.g−1 at 30 °C) compared to the parent adsorbents and the previously reported data. The kinetics and thermodynamic calculation results indicate the spontaneity and feasibility of the CS2 adsorption process.

Mechanism Study of Organic Sulfur Hydrogenation over Pt- and Pd-Loaded Alumina-Based Catalysts

“…4 From an industrial point of view, the main purpose of desulfurization is to avoid corrosion of chemical pipelines and chemical reactors, while ensuring that downstream catalysts are not poisoned by sulfur (CO hydrogenation catalysts). 5,6 Up to now, the traditional absorption method has high operating costs and poor regeneration capacity, 7 which can only be performed at low temperatures. Catalytic hydrolysis technology is affected by oxygen concentration and sulfur deposition.…”

“…Carbon disulfidecan be directly converted into sulfate aerosols and CO 2 through complex physicochemical and photochemical reactions, which contribute to the generation of PM 2.5 . − In addition, as a toxic and unnoticeable pollutant, even low concentrations of gaseous organosulfur compounds pose a serious and irreversible threat to natural organisms and human organs . From an industrial point of view, the main purpose of desulfurization is to avoid corrosion of chemical pipelines and chemical reactors, while ensuring that downstream catalysts are not poisoned by sulfur (CO hydrogenation catalysts). , …”