Adsorptive Desulfurization of Diesel Oil by Alkynyl Carbon Materials Derived from Calcium Carbide and Polyhalohydrocarbons

Abstract

Carbon-based materials are a kind of promising sorbent for the desulfurization of fuel oils, especially for polycyclic aromatic sulfur heterocycles (PASHs), and development of new sorbents is of great significance. In this paper, six alkynyl carbon materials (ACM-1 to ACM-6) were prepared for the first time through mechanochemical reaction of calcium carbide with six full halogenated hydrocarbons, i.e., CCl 4 , C 2 Cl 6 , C 2 Cl 4 , C 6 Cl 6 , C 6 Br 6 , and C 14 H 4 Br 10 , respectively. Their carbon content and specific surface areas (SSAs) were analyzed, and their adsorption performance for thiophenic sulfurs was studied. The ACMs are mesoporous materials with relatively high SSAs and favorable adsorptive performance for PASHs with the order of DBT > BT > 3-MT. Their adsorptivity is virtually consistent with the SSA values and follows the order of ACM-6 > ACM-5 > ACM-4 > ACM-1 > ACM-3 > ACM-2. ACM-6 has the highest SSA (712 m 2 g −1 ) and saturated adsorbance of 21.1 mg-S•g −1 for DBT in octane, as well as 6 mg-S•g −1 for real diesel. As a whole, ACM-6 represents the best ADS sorbent among all mesoporous carbon materials and may be applicable for real oils after some further modification.

Synthesis and characterization of a new nanocomposite (FeW11V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

“…Moreover, polyaromatic sulfur molecules such as benzothiophene (BT), dibenzothiophene (DBT) and their alkyl‐substituted derivatives have low reactivity in hydrogenation treatments because of their steric hindrance . Therefore, many alternative non‐HDS approaches have been suggested in order to meet ultralow sulfur standards, including oxidative desulfurization (ODS), extractive desulfurization, bio‐desulfurization, adsorptive desulfurization and desulfurization using supercritical water . Among them, ODS is considered as an energy‐efficient strategy for realizing the desired low levels of sulfur in fuel oils.…”

Calcium‐Based Sustainable Chemical Technologies for Total Carbon Recycling

“…A series of unexpected substrates can be produced in a mechanochemical reaction between calcium carbide and fully halogenated hydrocarbons . Mesoporous alkynyl carbon materials (ACMs) with different SSAs were tested as adsorbents for dibenzothiophene (Figure ) or Hg 2+ . Saturated desulfurizing sorbents can be regenerated by elution with minimal losses of the initial sorption capacity.…”

Vanadium Containing Metal‐organic Frameworks as Highly Efficient Catalysts for the Oxidation of Refractory Aromatic Sulfur Compounds

“…[1] Sulfur compounds have harmful effects on the environment because of the production of sulfur oxides after ignition, which is the primary source of environmental contamination and the greenhouse effect. [2] The elimination of polycyclic aromatic sulfur heterocycles (PASH) in fuel, such as dibenzothiophene (DBT) and their derivatives, by the conventional hydrodesulfurization procedure is difficult, [3] and to ensure highly effective elimination, harsh conditions, such as high temperatures, are essential. [4] Alternative processes have been considered to overcome these issues, [5] including adsorptive desulfurization (ADS), [6] oxidative desulfurization (ODS), [7] and extractive desulfurization for the effective removal of resistant sulfurs have been considered.…”

“…This compound is especially noteworthy because of its high stability and low-production expense. [25] Moreover, MOF-5, a zinc-based MOF, Zn 4 O(1,4benzenedicarboxylate) 3 , with a surface area of 3800 m 2 g À 1 , is also promising support for catalysts. [26] Despite the vast utilization of vanadium and MOFs as catalysts in oxidative desulfurization of refractory sulfur compounds, [21,27] to the best of our knowledge, there is no report on the employment of MOFs as support for vanadium species and use of them as catalysts in the ODS of DBT.…”