OXİDATİVE CONVERSİON OF METHANE. EFFECT OF CATALYST AND PERSPECTİVE DİRECTİONS OF REACTİON

Azerbaijan Journal of Chemical News Pub Date : 2021-01-07 DOI:10.32010/ajcn03032021-101

Etibar Ismayilov, D. Taghiyev, S. Zulfugarova, G. Azimova, S. Osmanova, J. Thybaut

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Abstract

The well-known MnNaW catalysts based on SiO2 for oxidative condensation of methane (OCM) were synthesized by various methods, characterized by X-ray diffractometry (XRD), scanning electron microscopy with energy dispersive elemental analysis (SEM/EDX), electron magnetic resonance (EMR) spectroscopy, N2 adsorption-desorption measurements, and tested as OCM catalysts at atmospheric pressure to convert into a mixture of ethylene + carbon oxides for further hydroformylation to propylene. The structural and catalytic features of the synthesized systems are discussed. The necessity of using mainly X-ray diffraction, Raman, and EMR methods for studying catalysts in situ mode in combination with online MS analysis of gasphase reaction products to establish the nature of catalytically active phases, centers, their mechanism of functioning, activation of CH4 with the formation of C-C bond for the synthesis of hydrocarbons C2 and C2+ is considered. Keywords: oxidative conversion of methane, NaMnW/SiO2 catalyst, ethylene-carbon monoxide mixture, magnetic, texture properties

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reactİon催化剂perspectİve dİrectİons的效果

采用多种方法合成了著名的二氧化硅氧化缩合甲烷(OCM) MnNaW催化剂，通过x射线衍射(XRD)、扫描电镜(SEM/EDX)、电子磁共振(EMR)光谱、N2吸附-解吸测试等手段对其进行了表征，并在常压下测试了OCM催化剂转化为乙烯+碳氧化物的混合物，进一步氢甲酰化生成丙烯。讨论了合成体系的结构和催化特性。结合气相反应产物的在线质谱分析，主要采用x射线衍射、拉曼和EMR方法对催化剂进行原位模式研究，以确定催化活性相的性质、中心、作用机理、CH4的活化和C-C键的形成对碳氢化合物C2和C2+的合成具有重要意义。关键词:甲烷氧化转化，纳米纳米w /SiO2催化剂，乙烯-一氧化碳混合物，磁性，织构性能

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Azerbaijan Journal of Chemical News

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