Synthesize and characterization of chitosan and silica supported on Fe₃O₄ nanoparticles for the adsorption and removal of asphaltene molecules from crude oil

Performance of carbonate calcium nanoparticles as filtration loss control agent of water-based drilling fluid

“…Nanoparticles have been proposed for wettability alteration, asphaltene deposition mitigation and removal, drilling fluid performance enhancement [7][8][9][10]. In drilling operations, they have been used for shale inhibition, fluid loss control, thermal conductivity improvement, enhancement of rheological properties [9,[11][12][13].…”

Sulfated zirconium oxide-decorated magnetite KCC-1 as a durable and recyclable adsorbent for the efficient removal of asphaltene from crude oil

“…A series of peaks appearing at 1580–1610 cm −1 were assigned to C C bond stretching vibrations. 33 In addition, a weak absorption at 1737 cm −1 was related to the C O stretching vibration in carbonyl groups. A peak at 1160 cm −1 was assigned to ester/ether bonds in the asphaltene framework ( Fig.…”

“…The equilibrium concentration ( C e ) of asphaltene can be obtained after the addition of each of the adsorbents. The percentage of asphaltene removal by the adsorbents was calculated by eqn (1) : 33 where R is the percentage of asphaltene removed from the solution, C 0 and C e are the initial concentration and the equilibrium concentration of asphaltene in mg L −1 , respectively. The adsorption capacity of asphaltene by the adsorbents was calculated by eqn (2) : 33 where V is the volume of solution (in L), W is the weight of the adsorbent (in g), A is the specific surface area in m 2 g −1 and Q e is the final adsorbent capacity in mg of asphaltene per gram of adsorbent mg m −1 .…”

“…To determine the kinetic mechanism of asphaltene adsorption, a duration of 12 h was chosen for this process. At times higher than 12 h, there may be some uctuations in the adsorption process, although the best time to balance is 24 h. 33,47 Data tting with the linear form of the relationships was performed to study the adsorption kinetics of three models: (i) quasi-rst-order (eqn (3)), (ii) quasi -secondorder (eqn (4)), and (iii) intraparticle diffusion (eqn (5)). 49 The equations for each are shown below: Intraparticle diffusion:…”

“…In order to measure the interfacial properties of asphaltene, a variety of pure asphaltene in the range of 50-2000 mg L À1 extracted by IP-143 test was prepared in toluene. The absorption of the solutions was recorded in l max related to asphaltene at 300 nm [28][29][30][31][32][33] by UV-Vis spectrophotometer.…”