Adsorption of quinoline from liquid hydrocarbons on graphite oxide and activated carbons

Abstract

Four carbon-based adsorbents (activated carbon, oxidatively modified activated carbon, graphite, and graphite oxide) were investigated as adsorbents for selective removing quinoline from a model hydrocarbon fuel. The surface chemical properties of these carbon-based adsorbents were characterized by temperatureprogrammed desorption coupled with mass spectrometry (TPD-MS), X-ray photoelectron spectroscopy (XRD), elementary analysis (EA) and nitrogen adsorption-desorption analyzer in detail. The influences of the textural structures and the surface functional groups of these carbon adsorbents on their adsorption performance were examined. The activated carbon modified by ammonium persulfate oxidation (APS) can achieve an adsorption capacity as high as 35.7 mg-N/g. The results indicated that the oxygen-containing functional groups on the surface play a crucial role in determining their adsorptive performance for quinoline. In addition, enhancement of the interlayer distance in the graphite oxide results in an dramatic increase in the adsorption capacity of the graphite oxide. The accessibility of the oxygen functional groups on the surface for quinoline is important to the adsorption behavior. Considering its high adsorption capacity and good regenerability, the graphite oxide may also be a promising adsorbent for selectively adsorptive removing the nitrogen compounds from the liquid hydrocarbon streams.Among the adsorbents, activated carbon (AC) has been widely studied in ADN due to its significant advantages, such as lower price, wider range of sources, and easy modification of pore structure and surface functional groups. 6,15,16,18 More importantly, it has good capacity and reasonable selectivity for nitrogen compounds. However, the maximum ADN capacity of AC reported in the literature is only around 17.6 mg-N per gram of solid, 15, 19 and the adsorption selectivity of ACs for the nitrogen compounds, especially

Regenerable Acidity of Graphene Oxide in Promoting Multicomponent Organic Synthesis

“…The CO evolved can be observed at the temperature range of 90 to 160 °C. CO gas detected at this temperature range is due to thermal decomposition of basal plane oxygen groups such as epoxides and alcohols 52,53 . The integrated area for CO evolving from 3xGO (7.76 × 10 −8 Torr) is greater than that of 2xGO (5.06 × 10 −8 Torr), indicating the relatively higher quantity of epoxide and alcohol groups on the surface of 3xGO.…”

Evaluation of Adsorbent Materials for the Removal of Nitrogen Compounds in Vacuum Gas Oil by Positive and Negative Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

“…Hydrodenitrogenation (HDN) and hydrodesulfurization (HDS) are the common methods used worldwide in oil refineries for the removal of nitrogen compounds in light and medium crude oil products, such as naphtha, kerosene, and diesel, in hydrotreatment (HDT) units. Nevertheless, a typical HDT process requires elevated temperature, high pressure, and high hydrogen consumption. , Other approaches could also be proposed, for example, adsorptive denitrogenation, , oxidative denitrogenation, and extractive denitrogenation. , However, all of these are usually used on a bench scale. The advantage of using an adsorption process for the removal of sulfur and nitrogen compounds in hydrocarbons is that these processes would not have intensive energy consumption, such as a HDT process, where high pressures and temperatures of operation are required.…”

“…The advantage of using an adsorption process for the removal of sulfur and nitrogen compounds in hydrocarbons is that these processes would not have intensive energy consumption, such as a HDT process, where high pressures and temperatures of operation are required. An adsorption process would not generate a large amount of byproducts, as in an oxidative process, and could be performed with a wide range of adsorbents, such as metal oxides, silica gel, zeolites, ion-exchange resins, activated alumina, activated carbon, polymeric adsorbents, graphite, and graphite oxide. ,, Adsorption material selection depends upon the type of chemical compound that will be removed, taking into consideration its adsorption capacity, selectivity, regenerability, lifetime, and price of the adsorbent . In 2015, Feng et al suggested the use of four carbon-based adsorbents (activated carbon, oxidatively modified activated carbon, graphite, and graphite oxide) to selectively remove quinoline from a model hydrocarbon fuel.…”

“…An adsorption process would not generate a large amount of byproducts, as in an oxidative process, and could be performed with a wide range of adsorbents, such as metal oxides, silica gel, zeolites, ion-exchange resins, activated alumina, activated carbon, polymeric adsorbents, graphite, and graphite oxide. ,, Adsorption material selection depends upon the type of chemical compound that will be removed, taking into consideration its adsorption capacity, selectivity, regenerability, lifetime, and price of the adsorbent . In 2015, Feng et al suggested the use of four carbon-based adsorbents (activated carbon, oxidatively modified activated carbon, graphite, and graphite oxide) to selectively remove quinoline from a model hydrocarbon fuel. They concluded that these four carbon-based adsorbents had a good adsorption capacity, highlighting that graphite oxide showed a much higher adsorption capacity for quinolone …”

“…In 2015, Feng et al suggested the use of four carbon-based adsorbents (activated carbon, oxidatively modified activated carbon, graphite, and graphite oxide) to selectively remove quinoline from a model hydrocarbon fuel. They concluded that these four carbon-based adsorbents had a good adsorption capacity, highlighting that graphite oxide showed a much higher adsorption capacity for quinolone …”