Low Sulfur Fuel Distillates Obtaining from Vacuum Gasoil

2015 ◽  
Vol 1085 ◽  
pp. 218-223
Author(s):  
Yury O. Karpov ◽  
Evgenii B. Krivtcov ◽  
Anatolii K. Golovko
Keyword(s):  
Fractional Composition ◽  
Material Balance ◽  
Vacuum Gasoil ◽  
Process Conditions ◽  
High Sulfur Content ◽  
Liquid Products ◽  
Low Sulfur ◽  
Sulfur Containing ◽  
Initial Object ◽  
Cracking Products

Novokuibyshevsk refinery vacuum gasoil (VG) with a high sulfur content (2.02 % wt.) thermocracking results are represented in abstract. Its density is 909.8 kg/m3. Material balance and fractional composition of liquid products cracking and reduction of sulfur containing in every component of it was established. Based on experimentally measured parameters we calculated gas, liquid, coke yields depending on process conditions. The amount of hydrocarbons and resins-asphaltens components increased in the vacuum gasoil cracking products, but these products have lower molecular weight in comparison to initial object. Cracking liquid products composition, which were gained after vacuum gasoil benzoyl peroxide (BP) oxidation pretreatment, specific differences from VG thermolysis products with BP used as radical forming addition were established.

The effect of a nickel-containing catalyst on the tar carbonization process

2021 ◽  
Vol 1 (1-2) ◽  
pp. 7-14
Author(s):  
V. V. Chesnokov ◽  
A. S. Chichkan ◽  
V. N. Parmon
Keyword(s):  
Gas Phase ◽  
Fractional Composition ◽  
Polyaromatic Hydrocarbons ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Gaseous Products ◽  
Hydrocarbon Chains ◽  
Liquid Products ◽  
Sulfur Containing ◽  
Diesel Fractions

Tar carbonization was studied in the absence or presence of the 7% Ni/CNT catalyst. It was shown that tar carbonization at a temperature of 350 °С without the catalyst leads to the formation of gaseous and liquid products and oil coke. Thermolysis products are formed via the separation of lateral hydrocarbon chains from the initial polyaromatic hydrocarbons. Gaseous products consist of С1-С6 hydrocarbons and sulfur-containing gases H2S and COS. Fractional composition of the liquid thermolysis products was studied. It was found that 50 % of the liquid products are represented by gasoline and diesel fractions. The 7% Ni/CNT catalyst was prepared by impregnation. The effect of this catalyst on the tar carbonization in the temperature range of 300–550 °С was studied. The addition of the 7% Ni/CNT catalyst to tar increased its yield and decreased the sulfur content due to partial conversion of sulfur to hydrogen sulfide and COS, which are removed with the gas phase. The electron microscopy study showed that the oil coke obtained upon catalytic tar carbonization is reinforced with carbon nanotubes.

scholarly journals The Effect of Carbonates and Silicates on the Cracking of a Mixture of Fuel Oil and Mechanically Activated Oil Shale

2021 ◽  
pp. 234-241
Author(s):  
Marina V. Mozhayskaya ◽  
Galina S. Pevneva ◽  
Vladimir G. Surkov
Keyword(s):  
Oil Shale ◽  
Fractional Composition ◽  
Fuel Oil ◽  
Gaseous Products ◽  
Liquid Products ◽  
Mineral Components ◽  
Diesel Fractions

The study cracking of a mixture of mechanically activated oil shale (MO OSh) and fuel oil, a mixture of demineralized MO GS and fuel oil has been investigated. The data on the composition of liquid products showed that after the removal of mineral components, oil shale is more easily destroyed due to the release of kerogen. It is shown that in the obtained liquid products of the cracking of the mixture of fuel oil – demineralized MO OSh, the proportion of oils increases to 74.6 % wt. In the composition of gaseous products of cracking, the amount of hydrogen, methane and ethane is noticeably reduced. According to the data on the fractional composition of liquid products, it was found that during the cracking of mixtures of fuel oil and MO HS, after the removal of carbonates and silicates, the proportion of gasoline and diesel fractions inc

Salinity-induced acidification in a wetland sediment through the displacement of clay-bound iron(II)

2010 ◽  
Vol 7 (5) ◽  
pp. 413 ◽  
Author(s):  
Annaleise R. Klein ◽  
Darren S. Baldwin ◽  
Balwant Singh ◽  
Ewen J. Silvester
Keyword(s):  
Alternative Pathway ◽  
Natural Sediment ◽  
Inland Waterways ◽  
Proton Production ◽  
Murray River ◽  
Eastern Australia ◽  
Displacement Experiments ◽  
Low Sulfur ◽  
Hydrolysis Of ◽  
Sulfur Containing

Environmental context Acidification of inland waterways is an emerging issue worldwide, mostly because it disturbs the balance of reduced sulfur species in soils, sediments and mine tailings. We describe a pathway for wetland acidification through salt displacement and oxidation of Fe2+ from clay minerals. This alternative pathway for acidification raises environmental concerns because an increasing number of inland waterways are affected by increasing salinity. Abstract A wetland near the Murray River (south-eastern Australia) was found to have significant levels of exchangeable reduced iron (Fe2+) in the sediment clay-zone, and the potential for acidification under high salinity and oxidising conditions. Cation exchange experiments using purified clay from this site show relative affinities consistent with the lyotrophic series: Fe2+>Ca2+>Mg2+>H+>K+>Na+. This relative affinity is confirmed in Fe2+ displacement experiments using natural sediment clay. Proton production during oxidation of salt-treated sediments corresponds to that expected for the oxidation and hydrolysis of Fe2+ displaced from clay interlayers, taking into account the buffering properties of the sediment matrix. This work shows that wetland acidification can occur in low sulfur-containing wetlands and is not exclusively a problem associated with sulfidic sediments.

Material balance of gasification of liquid products thermoconductive pyrolysis of wood wastes

2015 ◽  
Vol 3 (9) ◽  
pp. 211-215
Author(s):  
D. Tuntsev ◽  
A. Kasimov ◽  
E. Hayrullina ◽  
I. Romancheva ◽  
A. Savelev
Keyword(s):  
Material Balance ◽  
Liquid Products

scholarly journals Thermal dissociation of sulfur species: Analyzing variations in corrosivity of different condensate feedstock

2019 ◽  
Vol 74 ◽  
pp. 2
Author(s):  
Mabruk I. Suleiman ◽  
Mohammad A. Rakib ◽  
Hala Kelani ◽  
Mustafa Karakaya ◽  
Mohamed Al Musharfy ◽  
...  
Keyword(s):  
High Temperature ◽  
Sulfur Content ◽  
Gas Flow ◽  
Thermal Dissociation ◽  
Thermal Conditions ◽  
Process Conditions ◽  
Total Sulfur ◽  
Total Sulfur Content ◽  
Parametric Studies ◽  
Sulfur Containing

Traditionally, total sulfur content of a crude or condensate feedstock introduced to atmospheric distillation units in a refinery has been used as a measure to predict the high temperature corrosivity of these feeds. Such predictions were also utilized to decide on selection of materials of construction for refinery facilities processing condensate, and many chronic problems, sometimes leading to failure of materials have been reported. In reality, in addition to the total sulfur content, it is important to conduct a profiling of the distribution of the various types of sulfur components in the condensate or crude oil. A pilot plant, mimicking the thermal conditions in a condensate preheat train, was utilized to generate trends of H2S generation under various process conditions. The experimental variables included temperature, pressure, condensate feed rates, and sweep gas flow rates. Yields of H2S generation for the different conditions have been trended for the parametric studies. Such trends were compared for two different condensate feedstock, as a fundamental step towards understanding why different condensate feedstock exhibit significantly different pattern of H2S generation, and hence different corrosivity under similar high temperature processing conditions. Chromatograms of all sulfur containing species, as well as key types of sulfur-containing species have been presented to demonstrate why the H2S yield patterns can vary among different condensates.

scholarly journals The unrevealed potential of elemental sulfur for the synthesis of high sulfur content bio-based aliphatic polyesters

2020 ◽  
Vol 11 (2) ◽  
pp. 241-248 ◽  
Author(s):  
Martín E. Duarte ◽  
Birgit Huber ◽  
Patrick Theato ◽  
Hatice Mutlu
Keyword(s):  
Exchange Reaction ◽  
Functional Properties ◽  
Sulfur Content ◽  
Disulfide Bonds ◽  
Elemental Sulfur ◽  
Aliphatic Polyesters ◽  
High Sulfur Content ◽  
Sulfur Containing ◽  
Sulfur Exchange

We introduce a novel sulfur-containing polyester derivative based on a renewable monomer bearing secondary disulfide groups. Base-mediated sulfur exchange reaction of disulfide bonds using S8 delivers polyesters with tailored functional properties.

Research on the Correlation between Mercury and Sulfur Content in Coals

2012 ◽  
Vol 610-613 ◽  
pp. 526-529
Author(s):  
Qian Yan Liu ◽  
Yi Ran Zhang ◽  
Li Li Zhao ◽  
Yu Yu Yan ◽  
Qi Fen Li ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Mercury Content ◽  
Average Content ◽  
Mercury Analysis ◽  
High Sulfur Content ◽  
Experimental Apparatus ◽  
High Mercury ◽  
Analysis System ◽  
Low Sulfur ◽  
Sulfur In Coal

To reduce mercury emission in the flue gas at coal-fired power plant, it is very important and meaningful to research the mercury content and the existing status of other elements in coal. In this paper, mercury and sulfur content including their relevant relations of existing speciations from five coal samples were studied. Experimental method was based on U.S. EPA Method 7471 and experimental apparatus was automatic mercury analysis system Hydra AA. The results showed that in these 5 coal samples, the range of mercury content was from 0.284μg/g to 0.663μg/g and the average content was 0.401μg/g. The range of sulfur content was from 0.688% to 5.546% and the average content was 2.30% . The existing status of mercury and sulfur in coal was very complex. Under normal circumstances, when there was high sulfur content in coal, there was also high mercury content. However, the low sulfur coal may be of high mercury content.

Characteristics of New Absorbent System of Heteropoly Compound Solution for H2S Removal

2012 ◽  
Vol 531-532 ◽  
pp. 246-249 ◽  
Author(s):  
Jing Wang ◽  
Rui Wang
Keyword(s):  
Pollution Control ◽  
Heteropoly Acid ◽  
Removal Rate ◽  
Parent Compound ◽  
Heteropoly Compound ◽  
Gas Treatment ◽  
H2s Removal ◽  
Redox Method ◽  
Low Sulfur ◽  
Sulfur Containing

A new liquid redox method for low sulfur containing gas treatment, with H2S concentration less than 1000mg/m3, was developed employing the heteropoly compounds of molybdenum and phosphorus by the present authors. The desulfurization characteristics of the absorbent system of vanadium substituted heteropoly acid, viz. H4PVMo11O40, were investigated by dynamic outlet-gas H2S concentration detection method. Like the aqueous solution of the parent compound, namely H3PMo12O40 or its sodium salt, H4PVMo11O40 solution can also be used as efficient absorbent for H2S removal. The absorbent system of H4PVMo11O40 solution was found to have fairly good absorption-regeneration performance, with a H2S removal rate of up to 100% in the presence of CuS as additive, hence it is promising in pollution control and resource reclamation.

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