Application of low pressure capacitively coupled rf hydrogen plasma for low temperature reduction of iron clusters in structure of fe-pillared materials

© Published under licence by IOP Publishing Ltd.The unique properties of pillared materials determine their use in catalysis, purification and separation. The paper studies the reduction of composite catalysts, Fe-pillared materials. The authors compare their reduction in low temperature capacitively coupled RF hydrogen discharge of low pressure to their conventional direct hydrogen reduction in a tubular muffle furnace. X-ray diffraction analysis was used to characterize the iron-bearing phases. The results show that the reduction of iron hydro/oxide clusters associated with an aluminosilicate matrix to metallic iron is very challenging due to the degree of the pore space availability for hydrogen

Ni-Al mixed oxides as catalysts in the reactions of conversion of the higher alkanes

© SGEM2018. In this study, investigation of the composition, structure and catalytic activity of the catalyst support based on Ni-Al mixed oxides was carried out. The possibility of controlling structural and acid-base properties of the layered double hydroxides (LDH) by varying the ratio of M2+/M3+ metal cations determines its use as catalyst support. Besides varying of anions in the interlayer space allows to regulate catalytic system activity in the reaction medium. The Ni-Al LDH support was prepared by coprecipitation method followed by conversion to Ni-Al mixed oxide in the reaction medium. According to the X-ray diffraction analysis, it was shown that the Ni-Al-based mixed oxide obtained with a specific surface area of 158 m2/g contains nickel oxide with a reduced lattice parameter related with the replacement of part of Ni2+ cations with Al3+, phase of mixed oxides of variable composition and amorphous phase. The replacement of Ni2+ by Al3+ in nickel positions is 16%. The crystallite size of the obtained oxide phases is 4 nm. The catalytic activity of Ni-Al mixed oxide was determined in the reactions of the conversion of higher alkanes of the C11-C22 composition, taken in equal proportions, at a temperature of 500°C and a feed to catalyst ratio of 30. According to the chromatographic analysis, alkanes and isoalkanes of composition C7-C14 were formed as catalytic products. Unsaturated compounds in the reaction products were revealed by IR spectroscopy method; the iodine value was 0.172

Application of low pressure capacitively coupled rf hydrogen plasma for low temperature reduction of iron clusters in structure of fe-pillared materials

© Published under licence by IOP Publishing Ltd.The unique properties of pillared materials determine their use in catalysis, purification and separation. The paper studies the reduction of composite catalysts, Fe-pillared materials. The authors compare their reduction in low temperature capacitively coupled RF hydrogen discharge of low pressure to their conventional direct hydrogen reduction in a tubular muffle furnace. X-ray diffraction analysis was used to characterize the iron-bearing phases. The results show that the reduction of iron hydro/oxide clusters associated with an aluminosilicate matrix to metallic iron is very challenging due to the degree of the pore space availability for hydrogen

Application of low pressure capacitively coupled rf hydrogen plasma for low temperature reduction of iron clusters in structure of fe-pillared materials

© Published under licence by IOP Publishing Ltd.The unique properties of pillared materials determine their use in catalysis, purification and separation. The paper studies the reduction of composite catalysts, Fe-pillared materials. The authors compare their reduction in low temperature capacitively coupled RF hydrogen discharge of low pressure to their conventional direct hydrogen reduction in a tubular muffle furnace. X-ray diffraction analysis was used to characterize the iron-bearing phases. The results show that the reduction of iron hydro/oxide clusters associated with an aluminosilicate matrix to metallic iron is very challenging due to the degree of the pore space availability for hydrogen

Application of low pressure capacitively coupled rf hydrogen plasma for low temperature reduction of iron clusters in structure of fe-pillared materials

© Published under licence by IOP Publishing Ltd.The unique properties of pillared materials determine their use in catalysis, purification and separation. The paper studies the reduction of composite catalysts, Fe-pillared materials. The authors compare their reduction in low temperature capacitively coupled RF hydrogen discharge of low pressure to their conventional direct hydrogen reduction in a tubular muffle furnace. X-ray diffraction analysis was used to characterize the iron-bearing phases. The results show that the reduction of iron hydro/oxide clusters associated with an aluminosilicate matrix to metallic iron is very challenging due to the degree of the pore space availability for hydrogen

Ni-Al mixed oxides as catalysts in the reactions of conversion of the higher alkanes

© SGEM2018. In this study, investigation of the composition, structure and catalytic activity of the catalyst support based on Ni-Al mixed oxides was carried out. The possibility of controlling structural and acid-base properties of the layered double hydroxides (LDH) by varying the ratio of M2+/M3+ metal cations determines its use as catalyst support. Besides varying of anions in the interlayer space allows to regulate catalytic system activity in the reaction medium. The Ni-Al LDH support was prepared by coprecipitation method followed by conversion to Ni-Al mixed oxide in the reaction medium. According to the X-ray diffraction analysis, it was shown that the Ni-Al-based mixed oxide obtained with a specific surface area of 158 m2/g contains nickel oxide with a reduced lattice parameter related with the replacement of part of Ni2+ cations with Al3+, phase of mixed oxides of variable composition and amorphous phase. The replacement of Ni2+ by Al3+ in nickel positions is 16%. The crystallite size of the obtained oxide phases is 4 nm. The catalytic activity of Ni-Al mixed oxide was determined in the reactions of the conversion of higher alkanes of the C11-C22 composition, taken in equal proportions, at a temperature of 500°C and a feed to catalyst ratio of 30. According to the chromatographic analysis, alkanes and isoalkanes of composition C7-C14 were formed as catalytic products. Unsaturated compounds in the reaction products were revealed by IR spectroscopy method; the iodine value was 0.172

Vliyanie narusheniya kostnogo metabolizma na sostoyanie tkaney parodonta u muzhchin reproduktivnogo vozrasta s sakharnym diabetom 1 tina i puti korrektsii

The aims of this study were to investigate the influence of alterations in bone metabolism and in hormonal and biochemical parameters on periodontium tissue as well as to estimate the optimal algorithm of investigation and treatment in men with diabetes mellitus type 1. During the first stage (12 months) the comparative analysis of conditions of pariodontium tissue was conducted in 60 men of childbearing age with diabetes mellitus type 1 and in 25 men of the control group. During the second stage (12 months) the markers of bone metabolism and the conditions of paradontium tissue were studied in 26 men of childbearing age with diabetes mellitus type 1 and in 25 men of the control group. The marker of bone resorption (CTX) was significantly lower (372,7 pkg/ml versus 473,0 pkg/ml; p= 0,006) and the marker of bone formation (OK) was significantly higher (27,6 ng/ml compared to 21,42 ng/ml; p< 0,005) in the group of patients who received ALPHA D3-TEVA (alfacalcidol 0,75mkg/day) and 2 tab CALCEMIN ADVANCE (calcium 1000 mg, cholecalciferol 400 UI) in comparison with the control group. Conclusion: the treatment with Calcium and Vitamin D is effective for prevention of bone resorbtion, particularly in jaws

Heterogenous catalysts based on Fe-pillared clays for catalytic aquathermolysis processes of heavy oil

© Published under licence by IOP Publishing Ltd. Aquathermolysis process is one of the key technologies of reducing the viscosity and exploitation of huge deposits of heavy crude oil. That process combines thermal and catalytical effects in the presence of water. There are a lot of types of catalysts used in aquathermolysis process, such as water and oil soluble, heterogeneous catalysts and minerals. One of the type of heterogeneous catalysts are pillared clays that used in catalytic, sorption and separation processes. Pillared clays (PILC) are the class of two-dimensional micro-mesoporous materials that have a high specific surface area, constant porosity, developed texture and active compaunds in the structure, i.e. combine both the carrier and the catalyst. In this study the physico-chemical properties of Fe-pillared clays and its application in the "reconnaissance" heavy oil catalytic aquathermolysis experiments of has been investigated

Heterogenous catalysts based on Fe-pillared clays for catalytic aquathermolysis processes of heavy oil

© Published under licence by IOP Publishing Ltd. Aquathermolysis process is one of the key technologies of reducing the viscosity and exploitation of huge deposits of heavy crude oil. That process combines thermal and catalytical effects in the presence of water. There are a lot of types of catalysts used in aquathermolysis process, such as water and oil soluble, heterogeneous catalysts and minerals. One of the type of heterogeneous catalysts are pillared clays that used in catalytic, sorption and separation processes. Pillared clays (PILC) are the class of two-dimensional micro-mesoporous materials that have a high specific surface area, constant porosity, developed texture and active compaunds in the structure, i.e. combine both the carrier and the catalyst. In this study the physico-chemical properties of Fe-pillared clays and its application in the "reconnaissance" heavy oil catalytic aquathermolysis experiments of has been investigated

Heterogenous catalysts based on Fe-pillared clays for catalytic aquathermolysis processes of heavy oil

© Published under licence by IOP Publishing Ltd. Aquathermolysis process is one of the key technologies of reducing the viscosity and exploitation of huge deposits of heavy crude oil. That process combines thermal and catalytical effects in the presence of water. There are a lot of types of catalysts used in aquathermolysis process, such as water and oil soluble, heterogeneous catalysts and minerals. One of the type of heterogeneous catalysts are pillared clays that used in catalytic, sorption and separation processes. Pillared clays (PILC) are the class of two-dimensional micro-mesoporous materials that have a high specific surface area, constant porosity, developed texture and active compaunds in the structure, i.e. combine both the carrier and the catalyst. In this study the physico-chemical properties of Fe-pillared clays and its application in the "reconnaissance" heavy oil catalytic aquathermolysis experiments of has been investigated