scholarly journals Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al2O3 Catalysts

ACS Omega ◽  
2021 ◽  
Vol 6 (11) ◽  
pp. 7680-7692
Author(s):  
Héctor de Paz Carmona ◽  
Eliška Svobodová ◽  
Zdeněk Tišler ◽  
Uliana Akhmetzyanova ◽  
Kateřina Strejcová
Keyword(s):  
Rapeseed Oil ◽  
Gas Oil

scholarly journals Oxalic Acid as a Hydrogen Donor for the Hydrodesulfurization of Gas Oil and Deoxygenation of Rapeseed Oil Using Phonolite-Based Catalysts

Molecules ◽  
2020 ◽  
Vol 25 (16) ◽  
pp. 3732
Author(s):  
José Miguel Hidalgo Herrador ◽  
Jakub Fratczak ◽  
Zdeněk Tišler ◽  
Hector de Paz Carmona ◽  
Romana Velvarská
Keyword(s):  
Oxalic Acid ◽  
Rapeseed Oil ◽  
Fossil Fuels ◽  
Raw Materials ◽  
Hydrogen Donor ◽  
Gas Oil ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrogen Donors ◽  
Temperature Programmed

The use of renewable local raw materials to produce fuels is an important step toward optimal environmentally friendly energy consumption. In addition, the use of these sources together with fossil fuels paves the way to an easier transition from fossil to renewable fuels. The use of simple organic acids as hydrogen donors is another alternative way to produce fuel. The present work reports the use of oxalic acid as a hydrogen donor for the catalytic hydrodesulfurization of atmospheric gas oil and the deoxygenation of rapeseed oil at 350 °C. For this process, one commercial NiW/SiO2–Al2O3 solid and two NiW/modified phonolite catalysts were used, namely Ni (5%) W (10%)/phonolite treated with HCl, and Ni (5%) W (10%)/phonolite treated with oxalic acid. The fresh phonolite catalysts were characterized by Hg porosimetry and N2 physisorption, ammonia temperature programmed desorption (NH3-TPD), X-ray diffraction (XRD), and X-ray fluorescence (XRF). The sulfided metal phonolite catalysts were characterized by XRD and XRF. Hydrodesulfurization led to a decrease in sulfur content from 1 to 0.5 wt% for the phonolite catalysts and to 0.8 wt% when the commercial catalyst was used. Deoxygenation led to the production of 15 and 65 wt% paraffin for phonolite and commercial solids, respectively. The results demonstrate the potential of using oxalic acid as a hydrogen donor in hydrotreating reactions.

Co-Processing of Straight Run Gas Oil-Rapeseed Oil Mixture Using Sulfide NiMo Catalyst on Zeolite-Containing Support

2019 ◽  
Vol 92 (12) ◽  
pp. 1797-1804
Author(s):  
A. A. Porsin ◽  
E. N. Vlasova ◽  
A. L. Nuzhdin ◽  
P. V. Aleksandrov ◽  
G. A. Bukhtiyarova
Keyword(s):  
Rapeseed Oil ◽  
Gas Oil ◽  
Nimo Catalyst

scholarly journals The Effect of the Reaction Conditions on the Properties of Products from Co-hydrotreating of Rapeseed Oil and Petroleum Middle Distillates

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 442
Author(s):  
Petr Straka ◽  
Josef Blažek ◽  
Daria Toullis ◽  
Tomáš Ihnát ◽  
Pavel Šimáček
Keyword(s):  
Reaction Temperature ◽  
Rapeseed Oil ◽  
Space Velocity ◽  
Gas Oil ◽  
Reaction Conditions ◽  
Total Conversion ◽  
Hydrogen Flow ◽  
Weight Hourly Space Velocity ◽  
Middle Distillates ◽  
Al2o3 Catalyst

This study compares the hydrotreating of the mixture of petroleum middle distillates and the same mixture containing 20 wt % of rapeseed oil. We also study the effect of the temperature and the weight hourly space velocity (WHSV) on the co-hydrotreating of gas oil and rapeseed oil mixture. The hydrotreating is performed over a commercial hydrotreating Ni-Mo/Al2O3 catalyst at temperatures of ca. 320, 330, 340, and 350 °C with a WHSV of 0.5, 1.0, 1.5, and 2.0 h−1 under a pressure of 4 MPa and at a constant hydrogen flow of 28 dm3·h−1. The total conversion of the rapeseed oil is achieved under all the tested reaction conditions. The content of the aromatic hydrocarbons in the products reached a minimum at the lowest reaction temperature and WHSV. The content of sulphur in the products did not exceed 10 mg∙kg−1 at the reaction temperature of 350 °C and a WHSV of 1.0 h−1 and WHSV of 0.5 h−1 regardless of the reaction temperature. Our results show that in the hydrotreating of the feedstock containing rapeseed oil, a large amount of hydrogen is consumed for the dearomatisation of the fossil part and the saturation of the double bonds in the rapeseed oil and its hydrodeoxygenation.

scholarly journals Cleaner Fuel Production via Co-Processing of Vacuum Gas Oil with Rapeseed Oil Using a Novel NiW/Acid-Modified Phonolite Catalyst

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8497
Author(s):  
Jakub Frątczak ◽  
Nikita Sharkov ◽  
Hector De Paz Carmona ◽  
Zdeněk Tišler ◽  
Jose M. Hidalgo-Herrador
Keyword(s):  
Rapeseed Oil ◽  
Flow Reactor ◽  
Fixed Bed ◽  
Space Velocity ◽  
Gas Analysis ◽  
Vacuum Gas Oil ◽  
Gas Oil ◽  
Weight Hourly Space Velocity ◽  
Liquid Products ◽  
High Investment

Clean biofuels are a helpful tool to comply with strict emission standards. The co-processing approach seems to be a compromise solution, allowing the processing of partially bio-based feedstock by utilizing existing units, overcoming the need for high investment in new infrastructures. We performed a model co-processing experiment using vacuum gas oil (VGO) mixed with different contents (0%, 30%, 50%, 70%, 90%, and 100%) of rapeseed oil (RSO), utilizing a nickel–tungsten sulfide catalyst supported on acid-modified phonolite. The experiments were performed using a fixed-bed flow reactor at 420 °C, a hydrogen pressure of 18 MPa, and a weight hourly space velocity (WHSV) of 3 h−1. Surprisingly, the catalyst stayed active despite rising oxygen levels in the feedstock. In the liquid products, the raw diesel (180–360 °C) and jet fuel (120–290 °C) fraction concentrations increased together with increasing RSO share in the feedstock. The sulfur content was lower than 200 ppm for all the products collected using feedstocks with an RSO share of up to 50%. However, for all the products gained from the feedstock with an RSO share of ≥50%, the sulfur level was above the threshold of 200 ppm. The catalyst shifted its functionality from hydrodesulfurization to (hydro)decarboxylation when there was a higher ratio of RSO than VGO content in the feedstock, which seems to be confirmed by gas analysis where increased CO2 content was found after the change to feedstocks containing 50% or more RSO. According to the results, NiW/acid-modified phonolite is a suitable catalyst for the processing of feedstocks with high triglyceride content.

scholarly journals APPLICATION OF BROWN’S GAS FOR A DIESEL ENGINE RUNNING ON RAPESEED OIL / BRAUNO DUJŲ PANAUDOJIMAS ALIEJUMI VEIKIANČIAME DYZELINIAME VARIKLYJE

2012 ◽  
Vol 4 (4) ◽  
pp. 376-380
Author(s):  
Alfredas Rimkus ◽  
Tomas Ulickas ◽  
Saugirdas Pukalskas ◽  
Jonas Matijošius ◽  
Paulius Stravinskas
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Rapeseed Oil ◽  
High Efficiency ◽  
Test Results ◽  
Gas Oil ◽  
Nitrous Oxides ◽  
Engine Load ◽  
Experimental Works ◽  
Brown’S Gas

The article presents the analysis of possible applications of Brown’s gas to the diesel engine running on oil. The paper also contains a review of experimental works. The selected fuel combinations are as follows: diesel fuel, diesel fuel and Brown’s gas, oil (rapeseed oil) and oil and Brown’s gas. Test results have shown that an additional supply of Brown’s gas to the engine results in a decrease in the amounts of carbon monoxide (CO) and smoke level; however it increases the total emission of nitrous oxides (NOx). The supply of Brown’s gas at low engine load increases comparative effective fuel consumption and reduces high efficiency. Nevertheless, these performance indicators tend to improve at average engine load. Santrauka Straipsnyje nagrinėjamos Brauno dujų panaudojimo galimybės aliejumi veikiančiame dyzeliniame variklyje. Apžvelgti eksperimentiniai darbai. Pasirinkti šie degalų deriniai: dyzelinas, dyzelinas ir Brauno dujos, aliejus (pagamintas iš rapsų) bei aliejus ir Brauno dujos. Bandymo rezultatai rodo, kad varikliui papildomai tiekiant Brauno dujas, mažėja anglies monoksido (CO) kiekiai ir dūmingumas, bet didėja suminė azoto oksidų emisija (NOx). Brauno dujų panaudojimas esant mažoms variklio apkrovoms didina lyginamąsias efektyviąsias degalų sąnaudas ir mažina efektyvųjį naudingumo koeficientą, bet esant vidutinėms apkrovoms šie rodikliai gerėja.

scholarly journals Influence of Pressure on Product Composition and Hydrogen Consumption in Hydrotreating of Gas Oil and Rapeseed Oil Blends over a NiMo Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1093
Author(s):  
Josef Blažek ◽  
Daria Toullis ◽  
Petr Straka ◽  
Martin Staš ◽  
Pavel Šimáček
Keyword(s):  
Rapeseed Oil ◽  
Flow Reactor ◽  
Space Velocity ◽  
Light Cycle ◽  
Gas Oil ◽  
Cold Filter Plugging Point ◽  
Light Cycle Oil ◽  
Petroleum Feedstock ◽  
Hydrogen Consumption ◽  
Weight Hourly Space Velocity

This study describes the co-hydrotreating of mixtures of rapeseed oil (0–20 wt%) with a petroleum feedstock consisting of 90 wt% of straight run gas oil and 10 wt% of light cycle oil. The hydrotreating was carried out in a laboratory flow reactor using a sulfided NiMo/Al2O3 catalyst at a temperature of 345 °C, the pressure of 4.0 and 8.0 MPa, a weight hourly space velocity of 1.0 h−1 and hydrogen to feedstock ratio of 230 m3∙m−3. All the liquid products met the EU diesel fuel specifications for the sulfur content (<10 mg∙kg−1). The content of aromatics in the products was very low due to the high hydrogenation activity of the catalyst and the total conversion of the rapeseed oil into saturated hydrocarbons. The addition of a depressant did not affect the cold filter plugging point of the products. The larger content of n-C17 than n-C18 alkanes suggested that the hydrodecarboxylation and hydrodecarbonylation reactions were preferred over the hydrodeoxygenation of the rapeseed oil. The hydrogen consumption increased with increasing pressure and the hydrogen consumption for the rapeseed oil conversion was higher when compared to the hydrotreating of the petroleum feedstock.

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