Neftehimiâ
ISSN (print): 0028-2421
Media registration certificate: No. 0110162 dated 02/05/1993
Founder: Institute of Petrochemical Synthesis named after. A.V. Topchiev RAS, Russian Academy of Sciences
Editor-in-Chief: Maksimov Anton Lvovich
Number of issues per year: 6
Indexation: RISC, list of Higher Attestation Commissions, CrossRef, White List (level 2)
"Neftehimiâ" founded in 1961, offers original papers and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas.
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Vol 65, No 2 (2025)
Articles
77-96
HIGHLY EFFICIENT HYDROGENATION OF GUAIACOL ON Ru/TiO2 OBTAINED USING RUTHENIUM SILOXANE OLIGOMERS
Abstract
Методом нанесения рутенийсилоксанового олигомера на поверхность наноразмерного оксида титана(IV) получены Ru-содержащие катализаторы. Физико-химические свойства катализаторов исследованы методами рентгеновской фотоэлектронной спектроскопии (РФЭС), рентгенофазового анализа (РФА), растровой (РЭМ) и просвечивающей электронной микроскопии (ПЭМ), методом низкотемпературной адсорбции азота, термопрограммируемого восстановления водородом (ТПВ-H₂). Катализаторы испытаны в реакции гидрирования гваякола в додекане при температурах 150–250 °C и давлении водорода 5 МПа. Показано, что катализатор, полученный из рутенийсилоксана, обладает более высокой активностью в гидрировании гваякола по сравнению с аналогом, полученным из хлорида рутения.
97-105
Composition and structure of asphaltenes and resins isolated from vacuum residue exposed to combined thermo- and hydrocracking process in suspension phase
Abstract
The composition of asphaltenes and resins of concentrated product of hydrocracked vacuum residue (CPHVR) obtained by the technology of combined thermal and hydrocracking in a suspension phase has been studied for the first time. The asphaltene content in CPHVR is 48.6 wt.%, and the resin content is 14.3 wt.%. Comparative analysis of asphaltenes and resins of CPHVR by IR spectroscopy, MALDI mass spectrometry, elemental analysis, TGA, EPR and AAS allowed us to compare their composition and structure with the corresponding components in the initial vacuum residue. It was shown that asphaltenes and resins of CPHVR differ from the corresponding components of the initial vacuum residue by a lower molecular weight, a higher proportion of aromatic and condensed structures and a more than 30-fold reduced content of vanadium and nickel. The obtained results suggest that the composition of asphaltenes and resins of CPHVR mainly contains new components formed due to polycondensation, as well as certain polyaromatic structures that cannot be converted into distillates under hydrocracking conditions.
106-115
INCREASING THERMAL STABILITY OF BIO-OIL BY NEUTRALIZATION AND CATALYTIC CRACKING OF STABILIZED PRODUCTS
Abstract
This work investigates a method for stabilizing bio-oil by increasing its pH through treatment with sodium hydroxide and ammonia. It was shown, that alkaline treatment significantly improves the thermal stability of bio-oil and provide the possibility of its involvement in the process of catalytic cracking of vacuum gas oil was demonstrated. The stabilized samples were subjected to catalytic cracking in order to study the effect of the processing stage on the yield of the main products. An increase in the pH level of bio-oil contributes the intensification of the cracking process. Sodium hydroxide treatment leads to an increase in the conversion of vacuum gas oil from 78.6 to 82.2 % wt. and the yield of the gasoline fraction (IBP-200ºC) increased from 44.7 to 47.3 % wt. Ammonia treatment leads to an increase the yield of the gasoline fraction from 50 to 54.2 % wt. However, the cracking of bio-oil treated with sodium hydroxide led to irreversible catalyst deactivation due to the presence of sodium, whereas no such deactivation was observed for bio-oil treated with ammonia.
116-127
CATALYTIC CO-PROCESSING OF POLYETHYLENE TEREPHTHALATE AND POLYCARBONATE INTO AROMATIC HYDROCARBONS OVER NICKEL PHOSPHIDE
Abstract
Catalytic hydroprocessing of oxygen-containing plastic waste: polyethylene terephthalate and polycarbonate were carried out. A catalyst based on nickel phosphide containing crystalline phases of Ni2P and Ni(PO3)2 was obtained in situ during the co-processing of these plastics. The catalyst was studied using powder X-ray diffraction and X-ray photoelectron spectroscopy. As a result of quantitative processing of plastics over the catalyst, aromatic C6–C10 hydrocarbons were obtained with a selectivity up to 89% at 400°C, an initial hydrogen pressure of 9 MPa, and a reaction time of 6 hours.
128-133
NEW METHOD OF SYNTHESIS OF ADDITIVES FOR REDUCING THE CONTENT OF SULFUR OXIDES IN REGENERATION GASES OF THE CATALYTIC CRACKING PROCESS
Abstract
Синтезированы добавки к катализатору крекинга для снижения содержания оксидов серы в газах регенерации при переработке сырья с высоким содержанием серы. Добавки приготовлены на основе смешанных оксидов , выполняющих одновременно окислительную, адсорбционную и восстановительную функции. Синтезы смешанных оксидов на основе гидротальцитов осуществлены с использованием различных осадителей . Исследованы структурные и каталитические свойства добавок. Показано, что синтезированные добавки проявляют высокую эффективность работы при проведении циклических испытаний «реакция крекинга регенерация катализатора», которая составила при содержании добавки в каталитической системе 5 мас.%.
134-146
PREPARATION AND PHOTOCATALYTIC PROPERTIES OF TiO2-MCM-22 COMPOSITE PHOTOCATALYSTS
Abstract
Разработан быстрый и простой метод синтеза эффективных фотокатализаторов на основе диоксида титана и мезопористого цеолита MCM-22 из различных прекурсоров титана. Полученные фотокатализаторы были проанализиованы методами рентгенофазового анализа (РФА), низкотемпературной адсорбции азота, растровой электронной микроскопии (РЭМ). Фотокаталитическая активность образцов TiO2-MCM-22 была протестирована в реакциях фотокаталитического разложения красителя кристаллического фиолетового и окисления ацетона. Наибольшую фотокаталитическую активность продемонстрировал образец с соотношением TiO2‑цеолит 1:1, полученный из тетрахлорида титана. Степень деградации кристаллического фиолетового составила 22% при УФ облучении в течение 2 ч, а в реакции разложения ацетона активность составила 642 млн. д. (выход CO2).
147-153
Study of the process of hydrofining of petrolatums for the production of improved petroleum ceresins
Abstract
The article considers the results of qualified processing of industrially produced petrolatums in order to obtain hydrotreated ceresins with improved quality indicators. It has been established that preliminary multi-stage deoiling of petrolatum allows to reduce the sulfur content by 2-3 times. It has been shown that increasing the hydrogen pressure to 4.5 MPa during hydrotreating at a temperature of 260 °C allows to obtain ceresins whose properties are not inferior to commercial samples.
154-160
NICKEL PHOSPHIDE CATALYST BASED ON MESOPOROUS NANOSPHERICAL POLYMER IN HYDROCONVERSION OF GUAIACOL AND FURFURAL
Abstract
Получен нанесенный никельфосфидный катализатор in situ в условиях синтеза мезопористого резорцинформальдегидного полимера. Катализатор испытан в гидрировании гваякола и фурфурола в толуоле при давлении водорода 4 МПа. Исследованы характеристики гидрирования фурфурола в зависимости от давления водорода, массы загруженного катализатора, температуры и продолжительности процесса. Оценена активность полученного никельфосфидного катализатора в гидрировании смеси гваякола и фурфурола в толуоле.
161-170