CAJ | 학술논문

镍基钙钛矿分解氨制取氢气虽有稳定性好、价格低廉的优点，但也有完全分解温度偏高的缺点。为降低完全分解氨制取氢气的温度，实验采用柠檬酸络合法，通过改变A位掺杂离子与掺杂量对LaNiO3改性，并改变载体及负载量，制备一系列的催化剂。采用XRD、SEM、TEM表征技术进行表征，考察了Ba 含量对催化剂结构与性能的影响。实验表明在催化剂装填量为1mL、空速为10000h–1、原料气为纯氨的条件下，氨分解的最佳电子助剂离子为 Ba、最优催化剂为 w(NiO)=20%的 La0.9Ba0.1NiO3/MCM-41，氨气完全分解温度由650℃降为575℃。随着Ba掺杂量的增加，催化剂活性先增加，在x=0.1达到最大值，之后减小，掺杂Ba过多催化剂的结构由钙钛矿变为非钙钛矿，非钙钛矿结构的催化剂活性不如钙钛矿。
얼기개태광분해안제취경기수유은정성호、개격저렴적우점，단야유완전분해온도편고적결점。위강저완전분해안제취경기적온도，실험채용저몽산락합법，통과개변A위참잡리자여참잡량대LaNiO3개성，병개변재체급부재량，제비일계렬적최화제。채용XRD、SEM、TEM표정기술진행표정，고찰료Ba 함량대최화제결구여성능적영향。실험표명재최화제장전량위1mL、공속위10000h–1、원료기위순안적조건하，안분해적최가전자조제리자위 Ba、최우최화제위 w(NiO)=20%적 La0.9Ba0.1NiO3/MCM-41，안기완전분해온도유650℃강위575℃。수착Ba참잡량적증가，최화제활성선증가，재x=0.1체도최대치，지후감소，참잡Ba과다최화제적결구유개태광변위비개태광，비개태광결구적최화제활성불여개태광。
Nickel-based perovskite catalyst,for decomposing ammonia to produce hydrogen,has good stability and low cost,but also requires high decomposition temperature. In order to reduce the complete temperature decomposition of ammonia,experiments,using citrate method,by changing the A-site doping ions and doping amounts to modify LaNiO3,were conducted with changed carriers and load amounts to prepare a series of catalysts. With XRD,SEM,TEM characterization,the effects of Ba on the structure and properties of catalyst were studied. Under the conditions of catalyst loading amount of 1mL,space velocity of 10000h-1,and pure ammonia as feed gas,the best electronic aids ions of ammonia decomposition is Ba,the best catalyst isw(NiO) = 20% of La0.9Ba0.1NiO3/MCM-41,which can make the complete decomposition temperature decrease from 650℃ to 575℃. With the increase of Ba doping amount,catalyst activity first increased,reaches a maximum atx= 0.1,and then decreased. Due to too much Ba doping,the structure of the catalyst change from perovskite to non-perovskite. The catalyst activity of perovskite is better than that of non-perovskite.