The fly ashes(Class F and C)have been successfully used as the main substrates in the hydrothermal syntheses of Na-A,Na-P1,Na-X and sodalite zeolites.Both ashes and their derivatives after milling with magnetic field ...The fly ashes(Class F and C)have been successfully used as the main substrates in the hydrothermal syntheses of Na-A,Na-P1,Na-X and sodalite zeolites.Both ashes and their derivatives after milling with magnetic field grinder were used.The paper investigates the effect of fly ash fraction size on the syntheses efficiency and physicochemical properties of the obtained zeolites.The starting material and obtained zeolites were subjected to physicochemical characteristics using X-ray diffraction,X-ray fluorescence,particle size analysis,and scanning electron microscopy methods.The paper showed a significant effect of the used fly ash fractions on the quantity,purity,quality and level of crystallinity of the zeolites phase obtained.The application of the grinding process prior to the syntheses of zeolites,with a relatively small financial outlay,significantly increases their application potential.Obtained zeolites are a promising material in the context of their use,inter alia,in environmental protection.展开更多
Due to the restriction such as the Minamata Convention as well as the IED of the European Commission,mercury removal from flue gases of coal-fired power plants(CPP)is an increasingly important environmental issue.This...Due to the restriction such as the Minamata Convention as well as the IED of the European Commission,mercury removal from flue gases of coal-fired power plants(CPP)is an increasingly important environmental issue.This makes this topic very crucial for both the energy industry and scientists.This paper shows how mercury arises from natural resources,i.e.,coals,through their combustion processes in CPP and considers the issue of mercury content in flue gases and solid-state coal combustion by-products.The main part of this paper presents a review of the solid sorbents available for elemental mercury control and removal processes,tested on a laboratory scale.The described solutions have a potential for wider usage in exhaust gas treatment processes in the energy production sector.These solutions represent the latest developments in the field of elemental mercury removal from gases.The authors present an overview of the wide range of solid sorbents and their modifications intended to increase affinity for Hg^(0).Among the presented sorbents are the wellknown activated carbon solutions but also novel modifications to these and other innovative sorbent proposals based on,e.g.,zeolites,biochars,other carbon-based materials,metal-organic frameworks.The paper presents a wide range of characteristics of the described sorbents,as well as the conditions for the Hg^(0) removal experiments summarizing the compendium of novel solid sorbent solutions dedicated to the removal of elemental mercury from gases.展开更多
基金financed by The National Center for Research and Development contract No GEKON2/O2/266818/1/2015.
文摘The fly ashes(Class F and C)have been successfully used as the main substrates in the hydrothermal syntheses of Na-A,Na-P1,Na-X and sodalite zeolites.Both ashes and their derivatives after milling with magnetic field grinder were used.The paper investigates the effect of fly ash fraction size on the syntheses efficiency and physicochemical properties of the obtained zeolites.The starting material and obtained zeolites were subjected to physicochemical characteristics using X-ray diffraction,X-ray fluorescence,particle size analysis,and scanning electron microscopy methods.The paper showed a significant effect of the used fly ash fractions on the quantity,purity,quality and level of crystallinity of the zeolites phase obtained.The application of the grinding process prior to the syntheses of zeolites,with a relatively small financial outlay,significantly increases their application potential.Obtained zeolites are a promising material in the context of their use,inter alia,in environmental protection.
基金This work was supported by the National Centre for Research and Development project LIDER,Contract Number LIDER/384/L-6/14/NCBR/2015.
文摘Due to the restriction such as the Minamata Convention as well as the IED of the European Commission,mercury removal from flue gases of coal-fired power plants(CPP)is an increasingly important environmental issue.This makes this topic very crucial for both the energy industry and scientists.This paper shows how mercury arises from natural resources,i.e.,coals,through their combustion processes in CPP and considers the issue of mercury content in flue gases and solid-state coal combustion by-products.The main part of this paper presents a review of the solid sorbents available for elemental mercury control and removal processes,tested on a laboratory scale.The described solutions have a potential for wider usage in exhaust gas treatment processes in the energy production sector.These solutions represent the latest developments in the field of elemental mercury removal from gases.The authors present an overview of the wide range of solid sorbents and their modifications intended to increase affinity for Hg^(0).Among the presented sorbents are the wellknown activated carbon solutions but also novel modifications to these and other innovative sorbent proposals based on,e.g.,zeolites,biochars,other carbon-based materials,metal-organic frameworks.The paper presents a wide range of characteristics of the described sorbents,as well as the conditions for the Hg^(0) removal experiments summarizing the compendium of novel solid sorbent solutions dedicated to the removal of elemental mercury from gases.
