Hybrid technology for desulfurization of distillates with the use of new methods of green chemistry
Project Status: 3 Approved without Funding
Duration in months: 36 months
Objective
Project objective. This project is aimed to develop the hybrid technology of desulfurization of oil distillates, in particular:
· development of the method to produce oil products conforming to the standards EURO-3,4 by using new approaches of classic and green chemistry, which are based on improvement of desulfurization and operational properties during their preliminary ozonizing, processing with ultrasound and hydrogen peroxide.
· selection of heteroorganic compounds (GOC) from oxidized oil fraction and development of new methods and technologies for bioactive GOC synthesis for further use in agriculture and veterinary.
· development of the special-purpose catalysts based on use of nanostructured compounds spread on Al2O3 and zeolites and metal complex compounds of the nitrogen containing coal and ultrasonic methods affecting as on catalyst production process and on the process of oxidizing catalytic desulfurization of the model hydrocarbon systems affecting by hydrogen peroxide and hydroperoxides.
Business situation in research field
Currently the world faces a tend to sufficient increase of amount of cars running on diesel fuel. According to the prospects of the specialists, such tend will remain for a long time, what will result increase of demand for diesel fuel and, correspondingly, strengthening of the requirements to its quality. According to EU Specifications 2009, residual content of sulfur in diesel fuel shall not exceed 10 ppm (Euro-5). Currently, this value does not exceed 50 ppm, that requires close attention to study and solution of the problem by implementing new developments aimed to improve technologies of diesel fuel processing in order to reduce content of sulfur and to improve their operational properties.
In order to achieve the required result, we used the high-tech processes, which include the most important hydrogenation processes. Production of fuels containing less than 50 ppm of sulfur is associated with removal of hard-to-recover thiophen compounds and their condensed derivatives that results need to increase sufficiently pressure and temperature in the area of reaction. Nowadays, the process of desulfurization of oil and oil products is widely studied in EU countries, USA, Japan and the People's Republic of China, where the scientists offer a range of methods including use of catalysts, which are based on synthetic zeolite, complex catalysts with oxidative desulfurization in presence of peroxides and with further extraction. As well they offered the wide range of purification technologies, which use adsorption method and catalysts synthesized from metal alloys of given composition, which are purified from sulfur up to +90%. But all offered methods require significant economic expenditures and use of aggressive mediums for synthesis of the required condition of the process. The similar result - reduction of amount of sulfur compounds in fuels - can be obtained by resolving fundamental scientific problem - the creation of high-tech, profitable, low-waste and highly efficient method of purification of hydrocarbon crude from sulfur compounds. One of such methods can be liquid-phased oxidation of sulfur compounds under effect of hydrogen peroxide in presence of complexes of transition metals in two-phase systems. Impact of the proposed project on progress in this area.
The advantage of the proposed project is use of non-standard approaches to desulfurization of various oil fractions This approach will ensure almost complete removal of all hard-to-remove condensed derivatives of thiophen and production of high quality oil distillates as well it will allow using selected GOC to obtain bioactive substances.
Purification technology for hydrocarbons using non-standard methods, which are based on preliminary ozonizing and US processing, is poorly studied nowadays. So, the proposed technology has not analogues in the world, that will ensure competitive ability of the estimated results. Expected outcomes and their use:
During the implementation of the project:
• the following will be developed:
- procedure for oil product ozonizing and ultrasonic treatment processes;
- the scientific basis of ozonolysis and ultrasonic treatment of diesel fuels during hydrogenization processing to obtain the required commercial grade fuel of the specified quality.
- the method for obtaining oil distillates with low content of sulfur and satisfying the requirements of Euro-3 and Euro-4.
- the method of obtaining catalysts for oxidizing catalytic desulfurization of isooctane, cumene and their mixtures containing thiophene and benzothiophene with the help of hydrogen peroxide and cumene hydroperoxide;
• the synthesis of nanostructured catalysts will be performed with application of Ni-skeleton hydrotreatment catalysts and their modifications including perocomplexes of oxidizing desulfurization of oil and their model compounds onto Al2O3 and zeolites. The nature of nanostructured catalyst characteristics and physical and chemical properties of metal complex compounds on the desulfurization process will be identified.
· pilot batch of model fluid hydrocarbon mixtures oxidized desulfurization catalysts will be obtained with the help of hydrogen peroxide and cumene hydroperoxide (Armenia); main patterns of the specified processes and the relationships of the content of different catalysts with their oxidizing and regenerative activity will be defined. Optimum conditions of both processes providing high-quality fuels with ultra-low sulfur content will be found.
• heteroorganic compounds (HOC) will be isolated from the oxidized oil fraction and biologically active HOC synthesis methods and techniques for further use in agriculture and veterinary medicine.
• optimum process parameters of oil fraction hydrotreatment will be defined. The relationship between catalytic activity of the developed contacts and their physical and chemical characteristics will be defined. Process regulation of the oil diesel fraction hydrotreatment process will be developed.
Participating Institutions
LEADING
Scientific Research Institute of New Chemical Technologies and Materials
PARTICIPATING
Institute of Chemical Physics of the National Academy of Sciences (IChPh NAS RA)
