Synthesis and characterization of new hybrid inorganic–organic polymer nanocomposite as efficient catalyst for oxidative desulfurization of real fuel

Abstract

Sulfur‐containing compounds are responsible for much air pollution, and therefore eliminating these compounds is of importance. Herein, a hybrid organic–inorganic recyclable nanocatalyst (TBA‐PW11Ni@PANI) was synthesized successfully to investigate its effects on the catalytic oxidative desulfurization (CODS) process of real gasoline/model fuel. To this end, the Keggin‐based mono‐lacunary polyoxometalate [PW11NiO39] was prepared and modified with quaternary cation tetrabutylammonium (TBA). Then, this was further immobilized on polyaniline (PANI) via the sol–gel method. The synthesized nanocomposite was characterized using various techniques. The high dispersion of polyoxometalate on PANI was confirmed. Also, it was found that the crystalline structure remained unaltered after immobilization. In addition, the effects of various parameters such as dosage and temperature on the CODS of model fuel in the presence of H2O2–acetic acid (1:2 v/v) were studied in detail. Moreover, the kinetics of the CODS process was also studied and a mechanism proposed. According to the results, TBA‐PW11Ni@PANI showed an efficiency of up to 97% with 0.1 g at 35°C (optimum values) which implies its good catalytic functionality in the CODS process. Finally, the TBA‐PW11Ni@PANI catalyst displayed long‐term stability and good reusability after five runs.

Synthesis of Carbon Nitride Supported POM‐based IL for Deep Oxidative Desulfurization of Dibenzothiophene

“…The reaction conditions are as follows: m catalysts =0.1 g, V model oil =10 mL, n(O): n(S) molar ratio =5 : 1(V H2O2 =55 μL). The desulfurization rate increased with the increase of temperature before 20 min, which is consistent with molecular thermal motion theory [53–59] . However, in 40 min, the desulfurization rate reached 100 % at 60 °C, and the desulfurization rate only reached 92.8 % at 70°C.…”

“…The desulfurization rate increased with the increase of temperature before 20 min, which is consistent with molecular thermal motion theory. [53][54][55][56][57][58][59] However, in 40 min, the desulfurization rate reached 100 % at 60 °C, and the desulfurization rate only reached 92.8 % at 70°C. This is probably because excessive temperature will cause the decomposition of H 2 O 2 .…”

Ferrite-Supported Nanocomposite Polymers for Emerging Organic and Inorganic Pollutants Removal from Wastewater: A Review

“…The sol−gel method, which is based on inorganic polymerization, was originally used to make inorganic materials such as glasses and ceramics. 105 3.1.3. Inorganic−Organic Hybrid Nanocomposites.…”

“…This design has allowed the desirable features of an inorganic backbone that is mechanically and thermally robust, as well as the ductility, flexibility, and processability of the organic polymer, to be combined in a single solid. The sol–gel method, which is based on inorganic polymerization, was originally used to make inorganic materials such as glasses and ceramics …”

Remarkable Catalytic Performance of MoO(O2)2 Loaded in NH2‐UiO‐66 for Oxidative Desulfurization of Fuel Oil

“…In light of stringent environmental regulations, there has been considerable interest in developing efficient desulfurization processes to reduce the sulfur content in fuel oil. [3,4] Several alternative routes have been designed for desulfurization in the recent decade, including hydrodesulfurization [5] (HDS), catalytic oxidative desulfurization [6,7] (ODS), biodesulfurization [8,9] (BDS), extractive desulfurization [10,11] (EDS) and adsorptive desulfurization [12,13] (ADS). However, conventional hydrodesulfurization (HDS) processes have limitations in achieving ultra-low sulfur levels, particularly for polyaromatic sulfur compounds (such as DBT and its derivatives) due to their low reactivity.…”