摘要:
A process for reducing the concentration of carbon dioxide in a gas including carbon dioxide and water vapour (for example a flue gas or a cement plant flue gas) which process includes contacting the gas with a particulate solid, which solid includes an alkaline earth metal oxide or hydroxide and a promoter selected from an alkanolamine; an unsubstituted or substituted piperazine; an unsubstituted or substituted morpholine; and a polyethyleneamine oligomer.
摘要:
A process for reducing the carbon dioxide concentration of a carbon dioxide-containing gas which process includes, in a first stage, contacting the carbon dioxide-containing gas with a treating solution including an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution including an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material including an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate including the cation and to regenerate a solution including alkali metal carbonate.
摘要:
A process for reducing the carbon dioxide concentration of a carbon dioxide-containing gas which process includes, in a first stage, contacting the carbon dioxide-containing gas with a treating solution including an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution including an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material including an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate including the cation and to regenerate a solution including alkali metal carbonate.
摘要:
A process for decarbonation of particles of raw meal, to be burnt in a clinkering kiln at a cement plant, the process includes: a) decarbonation of particles of raw meal, in a fluidised bed heat exchanger, the particles being suspended in a rising carrier gas including carbon dioxide, the fluidised bed heat exchanger having a solid heat carrier circulating counter-current relative to the carrier gas, to provide an effluent gas including carbon dioxide and decarbonated raw meal; b) separating the effluent gas and the decarbonated raw meal c) separating the effluent gas into a first and second part; cooling the first part of the effluent gas and recycling to provide carrier gas, d) isolating the second part of effluent gas e) recovering and re-heating the heat carrier and recirculating to step (a).
摘要:
A process for decarbonation of particles of raw meal, to be burnt in a clinkering kiln at a cement plant, the process includes: a) decarbonation of particles of raw meal, in a fluidized bed heat exchanger, the particles being suspended in a rising carrier gas including carbon dioxide, the fluidized bed heat exchanger having a solid heat carrier circulating counter-current relative to the carrier gas, to provide an effluent gas including carbon dioxide and decarbonated raw meal; b) separating the effluent gas and the decarbonated raw meal c) separating the effluent gas into a first and second part; cooling the first part of the effluent gas and recycling to provide carrier gas, d) isolating the second part of effluent gas e) recovering and re-heating the heat carrier and recirculating to step (a).
摘要:
The invention relates to a hydraulic mineral composition which is characterized in that it comprises a vitreous or crystallised matrix based on magnesium and calcium silico-aluminates which represent at least 25 wt.-%, and preferably 30 wt.-%, of the composition, one or more mineral oxides and optionally one or more specific mineral halides which are selected from among the oxides and halides of Ti, V, Cr, Mn, Co, Ni, Cu, Pb, Ba, Sr, P, S, Na, K, Zr, Mo, Be, Tl, As, Sn and Cd and which represent at least 5 wt.-% of the composition, at most 31 wt.-% alumina (Al2O3), less than 10 wt.-% ferrite, and less than 0.05 wt.-%, and preferably less than 0.01 wt.-%, C in relation to the weight of the composition.
摘要翻译:本发明涉及一种水硬性矿物组合物,其特征在于,其包含基于镁和钙硅铝酸盐的玻璃质或结晶基质,其代表组合物的至少25重量%,优选30重量% 选自Ti,V,Cr,Mn,Co,Ni,Cu,Pb,Ba,Sr,P,S,Na,K的氧化物和卤化物中的一种或多种矿物氧化物和任选的一种或多种特定的矿物卤化物 ,Zr,Mo,Be,Tl,As,Sn和Cd,并且其占组合物的至少5重量%,至多31重量%的氧化铝(Al 2 O 3),小于10重量%的铁素体,和 相对于组合物的重量,小于0.05重量%,优选小于0.01重量%。
摘要:
A low cost steel desulphurating agent includes, compared with the total weight of the agent, at least 10% of SiO2, at least 10% of C2S, and at least 35% of at least one of calcium aluminate or calcium silico-aluminate. The desulphurating agent can include, compared with the total weight of the agent, the following mineralogical phases: 10 to 60% of C2S, 0 to 50% of C3A, 0 to 50% of C2AS, 0to 70% of C12A7, and 0 to 60% of CA.
摘要:
The invention relates to a steel desulphurating agent characterised in that it comprises compared with the total weight of the agent: at least 10% of SiO2, at least 10% of C2S, at least 35% of at least one calcium aluminate and optionally a calcium silico-aluminate.
摘要:
The invention relates to a hydraulic mineral composition which is characterised in that it comprises a vitreous or crystallised matrix based on magnesium and calcium silico-aluminates which represent at least 25 wt.-%, and preferably 30 wt.-%, of the composition, one or more mineral oxides and optionally one or more specific mineral halides which are selected from among the oxides and halides of Ti, V, Cr, Mn, Co, Ni, Cu, Pb, Ba, Sr, P, S, Na, K, Zr, Mo, Be, Tl, As, Sn and Cd and which represent at least 5 wt.-% of the composition, at most 31 wt.-% alumina (Al2O3), less than 10 wt.-% ferrite, and less than 0.05 wt.-%, and preferably less than 0.01 wt.-%, C in relation to the weight of the composition.
摘要翻译:本发明涉及一种水硬性矿物组合物,其特征在于,其包含基于镁和钙硅铝酸盐的玻璃质或结晶基质,其代表组合物的至少25重量%,优选30重量% 选自Ti,V,Cr,Mn,Co,Ni,Cu,Pb,Ba,Sr,P,S,Na,K的氧化物和卤化物中的一种或多种矿物氧化物和任选的一种或多种特定的矿物卤化物 ,Zr,Mo,Be,Tl,As,Sn和Cd,并且其占组合物的至少5重量%,至多31重量%的氧化铝(Al 2 O 3) 3%),小于10重量%的铁素体,和小于0.05重量%,并且优选小于0.01重量%,相对于组合物的重量。