CAJ | 학술논문

CN－18气态烃蒸汽转化催化剂是以α－Al2O3为载体的浸渍型Ni活性组分催化剂。其孔分布为，催化剂活性孔径500×10－10～5000×10－10m，输送孔径大于10000×10－10m。该催化剂孔内的有效扩散系数为2.450×102～2.905×102cm2.s，比通常工业使用的单峰孔催化剂的有效扩散系数要大一倍左右，对消除化学反应时的内扩散阻滞起到积极作用。用内循环无梯度反应器，在压力P=3.0MPa(绝)，温度550～750℃，水碳比(∑H2O/∑C)=2.0～ 4.0，碳空速4.5×105～1.1×106h－1的条件下，测取CN－18催化剂上甲烷蒸汽转化反应的宏观动力学数据，用CH4＋H2O＝CO3＋3H2和CH4＋2H2O＝CO2＋4H2，平行反应模型来描述反应的进行。将测得的数据采用阻尼最小二乘法回归处理得到了CN－18催化剂上甲烷蒸汽转化反应的一氧化碳和二氧化碳(RCO和RCO2)生成的宏观速率式，该式可用于使用CN－18催化剂时反应器的设计计算。
CN－18기태경증기전화최화제시이α－Al2O3위재체적침지형Ni활성조분최화제。기공분포위，최화제활성공경500×10－10～5000×10－10m，수송공경대우10000×10－10m。해최화제공내적유효확산계수위2.450×102～2.905×102cm2.s，비통상공업사용적단봉공최화제적유효확산계수요대일배좌우，대소제화학반응시적내확산조체기도적겁작용。용내순배무제도반응기，재압력P=3.0MPa(절)，온도550～750℃，수탄비(∑H2O/∑C)=2.0～ 4.0，탄공속4.5×105～1.1×106h－1적조건하，측취CN－18최화제상갑완증기전화반응적굉관동역학수거，용CH4＋H2O＝CO3＋3H2화CH4＋2H2O＝CO2＋4H2，평행반응모형래묘술반응적진행。장측득적수거채용조니최소이승법회귀처리득도료CN－18최화제상갑완증기전화반응적일양화탄화이양화탄(RCO화RCO2)생성적굉관속솔식，해식가용우사용CN－18최화제시반응기적설계계산。
CN－18 Catalyst for Methane Steam Reforming (MSR) is prepared by impregnating Ni onto α-Al2O3 carrier.It's microprore radial size is 500×10-10～5000×10-10m,and It's microprore radial size is about 10000×10-10m.The effection diffusion coefficient in this catalyst reaches 2.450×102～2.905×102(cm2*s-1).Almost twice of that of a traditional MSR catalyst.It is benifit to eliminate the stagnation of the diffusion in the reaction .Using an internal recycle grandientless reactor,the data about MSR reaction over CN-18 catalyst at 3.0 MPa absolute pressure,reaction temperature range 550～750℃,molar steam-to-carbon ratios of 2.0～4.0,carbon space velocities of 4.5×105～1.1×10-6h-1 were measured,A pralled reaction model were used to describe the experimental data.The global rate equations of both carbon monoxid and dioxide were obtained by using nonlinear paremetor estimation.