The reaction of methane with CO2 and H2O using catalyst MCD-2(a-Al2O3 with15%～17% impregnated NiO) has been investigated. After a 500 h continuous run underconditions: n (CH4): n(CO2): n(H2O)= 1: 1. 5: 0. 9,CH4 space...The reaction of methane with CO2 and H2O using catalyst MCD-2(a-Al2O3 with15%～17% impregnated NiO) has been investigated. After a 500 h continuous run underconditions: n (CH4): n(CO2): n(H2O)= 1: 1. 5: 0. 9,CH4 space velocity 1000 h-1,tem temperature 600～900℃ and 0. 6 MPa, it is found that the porous structure, mechanicalstrength,content of active nickel,XRD patterns and content of deposited carbon on the catalyst did not change drastically and the activity of the catalyst kept steady with the CH4 conversion,CO content on the product gas and H2/CO ratio being ≥92%, ～40% and ～1respectively.展开更多
综述了甲烷水蒸气重整制氢、甲烷部分氧化制氢、甲烷自热重整制氢以及化学链重整制氢等天然气制氢技术的进展,对催化剂的主要研究重点在于提升氢气的选择性、热稳定性、化学稳定性以及抗积炭性等性能。近年来,普遍以镍作为催化剂主体并...综述了甲烷水蒸气重整制氢、甲烷部分氧化制氢、甲烷自热重整制氢以及化学链重整制氢等天然气制氢技术的进展,对催化剂的主要研究重点在于提升氢气的选择性、热稳定性、化学稳定性以及抗积炭性等性能。近年来,普遍以镍作为催化剂主体并运用不同的制备方式向其中添加助剂(Co,Rh,Cu等)和载体(ZrO 2,Al 2O 3,Co 6-x Mg x Al 2等)以提升催化剂性能。将反应过程和分离过程集成、使碳捕集更为便利的化学链制氢技术更具发展前景,催化剂和载氧体的选择是该技术的关键,载氧体需具备低价、稳定、抗积炭以及高活性等性质。除催化剂以外,反应器的种类、原料中杂质的含量、反应加热时燃料的选择、产物中的碳捕集以及氢气提纯装置的选择均为天然气制氢领域的研究要点。展开更多
文摘The reaction of methane with CO2 and H2O using catalyst MCD-2(a-Al2O3 with15%～17% impregnated NiO) has been investigated. After a 500 h continuous run underconditions: n (CH4): n(CO2): n(H2O)= 1: 1. 5: 0. 9,CH4 space velocity 1000 h-1,tem temperature 600～900℃ and 0. 6 MPa, it is found that the porous structure, mechanicalstrength,content of active nickel,XRD patterns and content of deposited carbon on the catalyst did not change drastically and the activity of the catalyst kept steady with the CH4 conversion,CO content on the product gas and H2/CO ratio being ≥92%, ～40% and ～1respectively.
文摘综述了甲烷水蒸气重整制氢、甲烷部分氧化制氢、甲烷自热重整制氢以及化学链重整制氢等天然气制氢技术的进展,对催化剂的主要研究重点在于提升氢气的选择性、热稳定性、化学稳定性以及抗积炭性等性能。近年来,普遍以镍作为催化剂主体并运用不同的制备方式向其中添加助剂(Co,Rh,Cu等)和载体(ZrO 2,Al 2O 3,Co 6-x Mg x Al 2等)以提升催化剂性能。将反应过程和分离过程集成、使碳捕集更为便利的化学链制氢技术更具发展前景,催化剂和载氧体的选择是该技术的关键,载氧体需具备低价、稳定、抗积炭以及高活性等性质。除催化剂以外,反应器的种类、原料中杂质的含量、反应加热时燃料的选择、产物中的碳捕集以及氢气提纯装置的选择均为天然气制氢领域的研究要点。
