Laboratory of polyfunctional catalysts

Cobalt-containing catalysts promoted by noble metals and supported on alumina have been investigated in the reaction of interaction between carbon dioxide and methane at various experimental temperatures and pressures. It was shown that catalysts have a high activity in this reaction. At moderate conditions (T exp = 853 K, P = 1.0 MPa) the conversion of both carbon dioxide and methane is 30-40% depending on the nature of the second metal. The main reaction products are carbon oxide, hydrogen, water and oxygenates. The yield of the latter reaches 30%. The maximum conversion of both methane (100%) and carbon dioxide (94%) is reached at lower pressure (0.1 MPa) and at 1023 K. In these conditions the synthesis gas is the main reaction product. One of the advantages of the synthesized catalysts is their resistance to coke formation.

Cobalt-containing catalysts promoted by noble metals and supported on alumina have been investigated in the reaction of interaction between carbon dioxide and methane at various experimental temperatures and pressures. It was shown that catalysts have a high activity in this reaction. At moderate conditions (T exp = 853 K, P = 1.0 MPa) the conversion of both carbon dioxide and methane is 30-40% depending on the nature of the second metal. The main reaction products are carbon oxide, hydrogen, water and oxygenates. The yield of the latter reaches 30%. The maximum conversion of both methane (100%) and carbon dioxide (94%) is reached at lower pressure (0.1 MPa) and at 1023 K. In these conditions the synthesis gas is the main reaction product. One of the advantages of the synthesized catalysts is their resistance to coke formation.

The new multicomponent Co-based catalysts with additives of group 8 metal and rare earth elements and supported on alumina have been tested in the dry and steam conversion of a model biogas. The processes were carried out in a flow quartz reactor under the following conditions: atmospheric pressure, a gas hourly space velocity of 1000 h−1 and temperatures of 300–800°C. The catalysts were characterised using electron microscopy, BET and X-ray analysis.The methane is almost completely converted in the dry reforming of biogas at T≤800°C. Synthesis gas with a ratio of H2/CO>1.0 is a main product of biogas reforming over the multicomponent catalysts studied. Adding steam in a feed composition increases both the methane conversion and the hydrogen yield at lower temperatures. Almost complete methane conversion occurs at T<750°C in the steam reforming of biogas. The catalysts are highly effective and exhibit stable activity throughout 100 h of continuous testing.

The new supported zeolite-containing catalyst has been investigated in the reaction of interaction between carbon dioxide and real associated petroleum gases (APG) in presence of water steam at varying experiment temperature within a range of 300-900 °C and space velocity from 1000 to 6000 hr-1. It has been shown that the catalyst performs the high activity in reforming of APG. At 800 °C, the complete conversion of C2+ hydrocarbon fraction is occurred, degree of methane conversion gets 92.2 and carbon dioxide conversion – 93.4 %.The main product of reaction is synthesis-gas (mix of carbon oxide and hydrogen) with a ratio of H2/CO=1.4 at 800 °C. Also water and traces of oxygenates (basically acetic acid) are produced at T ≤ 600 °C. The catalyst works with practically the same activity at increasing space velocity by 4 times. The advantages of the synthesized catalyst are its activity, selectivity, stability, ability to work in water presence, and resistance to coke formation.

The 5%Co-Pt/Al2O3-ZrO2-CeO2 catalysts with varying amount of Zr and Ce were prepared by impregnation method, characterized by a number of physico-chemical methods. The catalytic performance of Co-Pt/Al2O3-ZrO2-CeO2 catalysts was tested in the dry (DRM), steam (SRM), and bireforming of methane – combined dry and steam reforming (BRM). The synthesized catalysts perform the high activity, selectivity and stability in all the 3 processes studied with producing syngas with regulating Н2/СО ratio.

Objective Evaluate the impact of pregnancy physiology and medication non-adherence on serum hydroxychloroquine (HCQ) pharmacokinetics (PK) and exposure-response in SLE. Methods We conducted a PK analysis using data from two observational pregnancy registries. We enrolled pregnant women with SLE taking HCQ at least 3 months prior to, and throughout pregnancy, and excluded those with multiple gestations. Using the PK model, we conducted dosing simulations and imputed 0%/20%/40%/60% non-adherence to evaluate the impact of adherence versus physiological changes on HCQ concentrations. We compared the effect of pregnancy-average non-adherent concentrations (≤100 ng/ mL vs >100 ng/mL) on preterm birth using adjusted logistic regression. Results We enrolled 56 women who had 61 pregnancies. By the third trimester, mean apparent HCQ clearance increased by 59.6%. At a dosage of 400 mg/day, fully adherent patients are expected to have HCQ concentrations ≤100 ng/mL only 0.3% of the time, compared with 24.2% when 60% of doses are missed. Persistently low HCQ concentrations throughout pregnancy were associated with a significantly higher odds of preterm birth, controlling for lupus nephritis and race (OR 11.2; 95% CI 2.3 to 54.2; p=0.003). Conclusions We observed significant changes in HCQ PK during pregnancy, resulting in a shortening in the drug's half-life by 10 days; however, medication non-adherence had a more pronounced effect on HCQ exposure compared with physiological changes alone. Moreover, pregnant women with non-adherent HCQ concentrations had significantly higher rates of preterm birth. Accordingly, optimising adherence in pregnancy may be more clinically meaningful than adjusting HCQ dosage to account for physiological changes. PK modelling indicates that serum HCQ concentrations ≤100 ng/mL are suggestive of nonadherence regardless of trimester and may help identify pregnancies at risk for poor outcomes.

The bimetallic cobalt-containing catalyst supported on alumina has been investigated in the reaction of interaction between carbon dioxide and light alkanes (mix of C2-C4 hydrocarbons) or individual methane at varying experiment temperature and pressure. It has been shown that the catalyst possesses the high activity in reforming of alkanes. The reactants’ conversion and products’ yield and composition depend on composition of initial feed and process conditions. The main product of CO2+CH4 reaction is synthesis-gas at atmospheric pressure, also water and oxygenates are produced at higher pressure. The yield of oxygenates (mainly methanol and ethanol) is about 2 % under the certain conditions (P= 2-5 atm). In addition to above products olefins are formed at the interaction between carbon dioxide and alkanes (C2-C4). One of the advantages of the synthesized catalyst is its resistance to coke formation.

Dry and bireforming (CO2-H2O) of methane are the most environmentally friendly routes involving two main greenhouse gases to produce syngas—an important building block for large-scale production of various commodity chemicals. The main drawback preventing their industrial application is the coke formation. Developing catalysts that do not favour or are resistant to coke formation is the only way to improve the catalyst stability. Designing an economically viable catalyst may be achieved by exploiting the synergic effects of combining noble (expensive but coke-resistant) and non-noble (cheap but prone to carbonisation) metals to form highly effective catalysts. This work deals with development of highly active and stable bimetallic Co-containing catalysts modified with small amount of Rh, 0.1–0.5 mass %. The catalysts were characterised by BET, XRD, TEM, SEM, XPS, and TPR-H2 methods and tested in dry, bi-, and for comparison in steam reforming of methane. It was revealed that the bim...

News of the Academy of sciences of the Republic of Kazakhstan 2 NAS RK is pleased to announce that News of NAS RK. Series of chemistry and technologies scientific journal has been accepted for indexing in the Emerging Sources Citation Index, a new edition of Web of Science. Content in this index is under consideration by Clarivate Analytics to be accepted in the Science Citation Index Expanded, the Social Sciences Citation Index, and the Arts & Humanities Citation Index. The quality and depth of content Web of Science offers to researchers, authors, publishers, and institutions sets it apart from other research databases. The inclusion of News of NAS RK. Series of chemistry and technologies in the Emerging Sources Citation Index demonstrates our dedication to providing the most relevant and influential content of chemical sciences to our community. Қазақстан Республикасы Ұлттық ғылым академиясы "ҚР ҰҒА Хабарлары. Химия жəне технология сериясы" ғылыми журналының Web of Science-тің жаңаланған нұсқасы Emerging Sources Citation Index-те индекстелуге қабылданғанын хабарлайды. Бұл индекстелу барысында Clarivate Analytics компаниясы журналды одан əрі the Science Citation Index Expanded, the Social Sciences Citation Index жəне the Arts & Humanities Citation Index-ке қабылдау мəселесін қарастыруда. Webof Science зерттеушілер, авторлар, баспашылар мен мекемелерге контент тереңдігі мен сапасын ұсынады. ҚР ҰҒА Хабарлары. Химия жəне технология сериясы Emerging Sources Citation Index-ке енуі біздің қоғамдастық үшін ең өзекті жəне беделді химиялық ғылымдар бойынша контентке адалдығымызды білдіреді. НАН РК сообщает, что научный журнал «Известия НАН РК. Серия химии и технологий» был принят для индексирования в Emerging Sources Citation Index, обновленной версии Web of Science. Содержание в этом индексировании находится в стадии рассмотрения компанией Clarivate Analytics для дальнейшего принятия журнала в the Science Citation Index Expanded, the Social Sciences Citation Index и the Arts & Humanities Citation Index. Web of Science предлагает качество и глубину контента для исследователей, авторов, издателей и учреждений. Включение Известия НАН РК в Emerging Sources Citation Index демонстрирует нашу приверженность к наиболее актуальному и влиятельному контенту по химическим наукам для нашего сообщества.

News of the Academy of sciences of the Republic of Kazakhstan 2 NAS RK is pleased to announce that News of NAS RK. Series of chemistry and technologies scientific journal has been accepted for indexing in the Emerging Sources Citation Index, a new edition of Web of Science. Content in this index is under consideration by Clarivate Analytics to be accepted in the Science Citation Index Expanded, the Social Sciences Citation Index, and the Arts & Humanities Citation Index. The quality and depth of content Web of Science offers to researchers, authors, publishers, and institutions sets it apart from other research databases. The inclusion of News of NAS RK. Series of chemistry and technologies in the Emerging Sources Citation Index demonstrates our dedication to providing the most relevant and influential content of chemical sciences to our community. Қазақстан Республикасы Ұлттық ғылым академиясы "ҚР ҰҒА Хабарлары. Химия және технология сериясы" ғылыми журналының Web of Science-тің жаңаланған нұсқасы Emerging Sources Citation Index-те индекстелуге қабылданғанын хабарлайды. Бұл индекстелу барысында Clarivate Analytics компаниясы журналды одан әрі the Science Citation Index Expanded, the Social Sciences Citation Index және the Arts & Humanities Citation Index-ке қабылдау мәселесін қарастыруда. Webof Science зерттеушілер, авторлар, баспашылар мен мекемелерге контент тереңдігі мен сапасын ұсынады. ҚР ҰҒА Хабарлары. Химия және технология сериясы Emerging Sources Citation Index-ке енуі біздің қоғамдастық үшін ең өзекті және беделді химиялық ғылымдар бойынша контентке адалдығымызды білдіреді. НАН РК сообщает, что научный журнал «Известия НАН РК. Серия химии и технологий» был принят для индексирования в Emerging Sources Citation Index, обновленной версии Web of Science. Содержание в этом индексировании находится в стадии рассмотрения компанией Clarivate Analytics для дальнейшего принятия журнала в the Science Citation Index Expanded, the Social Sciences Citation Index и the Arts & Humanities Citation Index. Web of Science предлагает качество и глубину контента для исследователей, авторов, издателей и учреждений. Включение Известия НАН РК в Emerging Sources Citation Index демонстрирует нашу приверженность к наиболее актуальному и влиятельному контенту по химическим наукам для нашего сообщества.

Mono-and bimetallic cobalt-containing catalysts supported on alumina have been investigated in the reaction of interaction between carbon dioxide and methane at variation of experiment temperature and pressure. It was shown, that the bimetallic catalysts have a high activity in this reaction in compare with monometallic ones. The main reaction products are carbon oxide, hydrogen, water and oxygenates. The yield of latter reaches 30% at certain conditions (P > 0.5 MPa, T < 853K). The maximum conversion of both methane (100%) and carbon dioxide (94%) is reached at lower pressure (0.1MPa) and 1023Ê. In these conditions the synthesis-gas is a main reaction product. One of the advantages of the bimetallic catalysts is their resistance to coke formation.

Results of research of thermodynamic modeling of thermochemical decomposition of CaSO 4 by a mix of carbon and hydrogen are given in the article. Influence of temperature on degree of carbon interchange by hydrogen on a degree of formation in systems CaO, ɋɚɋɈ 3 , CaS was determined. Interchange of C by ɇ 2 reduces formation of ɋɚɋɈ 3 , CaS, and formation of ɋɚɈ has an extreme character. With the help of method of research planning adequate equation of regression has been defined and optimum technological parameters (Ɍ = 1660 Ʉ and 40 % degree of carbon interchange by ɇ 2), providing full decomposition of CaSO 4 to ɋɚɈ were determined. The composition of a gas phase of CaSO 4 restoration, containing 16 components was established. By reduction of pressure to 0,001 ɆPɚ it is possible to lower temperature of process to 1400 Ʉ. The chemical equation of CaSO 4 interaction with carbon and hydrogen was found.

News of the Academy of sciences of the Republic of Kazakhstan 2 NAS RK is pleased to announce that News of NAS RK. Series of chemistry and technologies scientific journal has been accepted for indexing in the Emerging Sources Citation Index, a new edition of Web of Science. Content in this index is under consideration by Clarivate Analytics to be accepted in the Science Citation Index Expanded, the Social Sciences Citation Index, and the Arts & Humanities Citation Index. The quality and depth of content Web of Science offers to researchers, authors, publishers, and institutions sets it apart from other research databases. The inclusion of News of NAS RK. Series of chemistry and technologies in the Emerging Sources Citation Index demonstrates our dedication to providing the most relevant and influential content of chemical sciences to our community. Қазақстан Республикасы Ұлттық ғылым академиясы "ҚР ҰҒА Хабарлары. Химия жəне технология сериясы" ғылыми журналының Web of Science-тің жаңаланған нұсқасы Emerging Sources Citation Index-те индекстелуге қабылданғанын хабарлайды. Бұл индекстелу барысында Clarivate Analytics компаниясы журналды одан əрі the Science Citation Index Expanded, the Social Sciences Citation Index жəне the Arts & Humanities Citation Index-ке қабылдау мəселесін қарастыруда. Webof Science зерттеушілер, авторлар, баспашылар мен мекемелерге контент тереңдігі мен сапасын ұсынады. ҚР ҰҒА Хабарлары. Химия жəне технология сериясы Emerging Sources Citation Index-ке енуі біздің қоғамдастық үшін ең өзекті жəне беделді химиялық ғылымдар бойынша контентке адалдығымызды білдіреді. НАН РК сообщает, что научный журнал «Известия НАН РК. Серия химии и технологий» был принят для индексирования в Emerging Sources Citation Index, обновленной версии Web of Science. Содержание в этом индексировании находится в стадии рассмотрения компанией Clarivate Analytics для дальнейшего принятия журнала в the Science Citation Index Expanded, the Social Sciences Citation Index и the Arts & Humanities Citation Index. Web of Science предлагает качество и глубину контента для исследователей, авторов, издателей и учреждений. Включение Известия НАН РК в Emerging Sources Citation Index демонстрирует нашу приверженность к наиболее актуальному и влиятельному контенту по химическим наукам для нашего сообщества.

News of the Academy of sciences of the Republic of Kazakhstan 2 NAS RK is pleased to announce that News of NAS RK. Series of chemistry and technologies scientific journal has been accepted for indexing in the Emerging Sources Citation Index, a new edition of Web of Science. Content in this index is under consideration by Clarivate Analytics to be accepted in the Science Citation Index Expanded, the Social Sciences Citation Index, and the Arts & Humanities Citation Index. The quality and depth of content Web of Science offers to researchers, authors, publishers, and institutions sets it apart from other research databases. The inclusion of News of NAS RK. Series of chemistry and technologies in the Emerging Sources Citation Index demonstrates our dedication to providing the most relevant and influential content of chemical sciences to our community. Қазақстан Республикасы Ұлттық ғылым академиясы "ҚР ҰҒА Хабарлары. Химия жəне технология сериясы" ғылыми журналының Web of Science-тің жаңаланған нұсқасы Emerging Sources Citation Index-те индекстелуге қабылданғанын хабарлайды. Бұл индекстелу барысында Clarivate Analytics компаниясы журналды одан əрі the Science Citation Index Expanded, the Social Sciences Citation Index жəне the Arts & Humanities Citation Index-ке қабылдау мəселесін қарастыруда. Webof Science зерттеушілер, авторлар, баспашылар мен мекемелерге контент тереңдігі мен сапасын ұсынады. ҚР ҰҒА Хабарлары. Химия жəне технология сериясы Emerging Sources Citation Index-ке енуі біздің қоғамдастық үшін ең өзекті жəне беделді химиялық ғылымдар бойынша контентке адалдығымызды білдіреді. НАН РК сообщает, что научный журнал «Известия НАН РК. Серия химии и технологий» был принят для индексирования в Emerging Sources Citation Index, обновленной версии Web of Science. Содержание в этом индексировании находится в стадии рассмотрения компанией Clarivate Analytics для дальнейшего принятия журнала в the Science Citation Index Expanded, the Social Sciences Citation Index и the Arts & Humanities Citation Index. Web of Science предлагает качество и глубину контента для исследователей, авторов, издателей и учреждений. Включение Известия НАН РК в Emerging Sources Citation Index демонстрирует нашу приверженность к наиболее актуальному и влиятельному контенту по химическим наукам для нашего сообщества.

H ydrogen is the most accredited fuel for the future, hence, several efforts are actually focused towards the development of processes and catalysts for producing hydrogen rich syngas from bio-fuels including biogas [1-2]. Biogas can be converted to synthesis gas composed of hydrogen and carbon oxide mainly by dry reforming or by a combination of dry and steam reforming using appropriate catalysts. Since the CH4 to CO2 ratio in biogas is about 1.5, dry reforming alone can lead to significant carbon deposition. Carbon deposition can be significantly inhibited by adding a small amount of steam and/ or CO2 into an initial feed and optimization of operative conditions. The problem of developing highly active and stable to carbonization catalysts has not yet been solved and remains one of the most important for these processes [2-5]. In this work, the multicomponent Co-containing catalysts were synthesized and tested in dry and steam reforming of a biogas. The processes were carried out in a tubular flow reactor with using a model biogas with a ratio of CH4/CO2=1:1 under atmospheric pressure, varying gas hourly space velocity (GHSV) and temperature within 1000-3000h-1 and 300-800oC respectively. The 0.5-2 volume parts of steam have been added to a feed for providing steam reforming of biogas. To elucidate the stability of the catalysts they were continuously tested for a long-term period-100-400 hours. The catalysts were characterised by a number of physico-chemical methods. The synthesized catalysts perform a high stable activity in both dry and steam biogas reforming with producing hydrogen rich syngas. At 700°C, P=0.1MPa, and GHSV=1000h-1, methane conversion reaches 95.0-99.0% and syngas produced gets a ratio of H2/CO=1.2-2.7 depending on the catalyst composition and process conditions. The catalysts performed a high stable activity for all period of testing in both processes.