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Zhovtyansky V.,Gas Institute of NAS of Ukraine | Dudnyk O.,Coal Energy Technology Institute of NAS of Ukraine | Petrov S.,Gas Institute of NAS of Ukraine | Verbovsky V.,Gas Institute of NAS of Ukraine | And 2 more authors.
High Temperature Material Processes | Year: 2015

The steam plasma torch was used to reform the products of gasification at the outlet of the smallscale industrial downdraught air gasifier. This combination allows increasing essentially the hydrogen yield of the system. Pine (90 wt.%) and oak (10 wt.%) were used for air gasification. Additional yield of hydrogen was provided by plasma-steam conversion of unreacted organic products after air gasifier. A technique for evaluation of the effect of plasma-steam conversion of air gasification products on an increase of hydrogen yield is developed. An air gasifier with a thermal capacity up to 5 kW and a plasma torch with electric power of 0.4–1.9 kW were used. If the plasma torch electric power was 1.1–1.4 kW, the increase of hydrogen yield in the fuel gas was 1.5–2.1 times compared to the fuel gas after the air gasifier. © 2013 by Begell House, Inc.


Bondarenko B.,Gas Institute of NAS of Ukraine | Sviatenko O.,Gas Institute of NAS of Ukraine | Kotov V.,Gas Institute of NAS of Ukraine | Khovavko A.,Gas Institute of NAS of Ukraine | And 3 more authors.
International Journal of Energy for a Clean Environment | Year: 2013

In the present work, there are studied new approaches that would give the possibility to receive continuously carbon nanotubes. As the basic technology was used the process at moderate temperatures (in the range of a kinetic-thermodynamic maximum of passing of the Bell-Boudoir reaction). Products of natural gas air conversion with strictly controllable hydrogen, carbon, and oxygen potentials were used in a role of reactionary gas. Also, a possibility of carbon nanotubes manufacturing from a generator gas was explored. Maximum output of a final product has been achieved on an iron ore concentrate of the Inguletzky ore mining and processing enterprise (Krivoy Rog, Ukraine), which was used among many in the capacity of the catalyst of carbon nano-tubes formation. © 2013 by Begell House, Inc.


Bondarenko B.I.,Gas Institute of NAS of Ukraine | Moraru V.N.,Gas Institute of NAS of Ukraine | Ilienko B.K.,Gas Institute of NAS of Ukraine | Khovavko A.I.,Gas Institute of NAS of Ukraine | And 4 more authors.
International Journal of Energy for a Clean Environment | Year: 2013

In view of the extreme importance of an eff ective cooling of power equipment, as confirmed by accidents that have taken place in nuclear reactors, development of nanofluids and study of their properties, intensity of heat transfer, including boiling crisis, are very important today. For this purpose, test units for pool boiling of nanofluids investigation were constructed. A nichrome wire at alternating current has been used as a heating source. Nichrome resistivity depends on a temperature. This fact is taken as a basis of the heater's temperature determination. All measurements, data collection, and calculations of the parameters (current, voltage, critical heat flux, heat transfer coefficient, etc.) were performed by a computer and developed software data acquisition and processing system in real time. Simultaneously graphical relationships were built that specified the above variables and parameters. The obtained results allowed some conclusions to be made about essential increase of a specific heat flux that defines the boiling crisis for a number of nanofluids, influence of initial concentrations of nanoparticles in liquids, presence of dispersants, nature of nanoparticles and regimes of a fluid flow on a boiling crisis, and a heat transfer coefficient. There were preliminary conclusions also made concerning possible mechanism of nanoparticle influence on a heat transfer at nanofluids boiling. © 2013 by Begell House, Inc.


Vavrysh A.S.,Gas Institute of NAS of Ukraine | Nebesniy A.A.,Gas Institute of NAS of Ukraine | Bondarenko B.I.,Gas Institute of NAS of Ukraine | Khovavko A.I.,Gas Institute of NAS of Ukraine | And 2 more authors.
NANOCON 2013 - Conference Proceedings, 5th International Conference | Year: 2013

The literary review [1] of published articles and monographs shows that the most promising objects for hydrogen storage are carbon nanomaterials, in particular, carbon nanotubes; some authors suggest specify in possibility of use of the thermally expanded graphite. Obtaining and studying hydrogen adsorption in carbon sorbents opens the great opportunities and makes the scientists face practical tasks. The aim of the present work is the syntheses of potential promising carbon nanomaterials for hydrogen storage, the consideration of the sorption-determining structural features and their sorption mechanisms for gaseous and condensed substances. Special attention is given to carbon nanomaterials applications for storing hydrogen and other gaseous substances.


Bondarenko B.I.,Gas Institute of NAS of Ukraine | Sviatenko O.M.,Gas Institute of NAS of Ukraine | Kotov V.G.,Gas Institute of NAS of Ukraine | Khovavko A.I.,Gas Institute of NAS of Ukraine | And 2 more authors.
NANOCON 2012 - Conference Proceedings, 4th International Conference | Year: 2012

In the present work there were studied new approaches which would give the possibility to receive continuously carbon nanotubes (CN). As the basic technology it was used process at moderate temperatures (in the range of a kinetic-thermodynamic maximum of passing of Bell-Boudouard reaction). Products of air conversion of natural gas with strictly controllable hydrogen, carbon and oxygen potentials were used in a role of reactionary gas. Also, a possibility of CN manufacturing from a generator gas was explored. Maximum output of a final product has been achieved on an iron-ore concentrate of the Inguletzky ore mining and processing enterprise (Krivoi Rog, Ukraine) which used among many in the capacity of the catalyst of CN formation.

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