催化学报
催化學報
최화학보
CHINESE JOURNAL OF CATALYSIS
2009年
3期
223-229
,共7页
冯冬梅%左宜赞%王德峥%王金福
馮鼕梅%左宜讚%王德崢%王金福
풍동매%좌의찬%왕덕쟁%왕금복
二甲醚%水蒸气重整%制氢%酸性催化剂%铜基催化剂
二甲醚%水蒸氣重整%製氫%痠性催化劑%銅基催化劑
이갑미%수증기중정%제경%산성최화제%동기최화제
dimethyl ether%steam reforming%hydrogen production%acid catalyst%copper catalyst
二甲醚水蒸气重整制氢反应是燃料电池理想的供氢方式之一.探讨了二甲醚水蒸气重整过程中的反应与反应、反应与传热的耦合协同效应.采用二甲醚水解催化剂ZSM-5(硅铝比为25)和甲醇水蒸气重整催化剂(Cu-Zn系列及商用Cu-Zn-Al催化剂)混合制得二甲醚水蒸气重整的复合催化剂.在固定床反应装置中评价了催化剂活性并对催化剂进行了透射电镜、X射线衍射及N2吸附表征.结果表明,复合催化剂的活性除了受催化剂组成和铜含量的影响外,还与Al和Zr的量有关.在Cu:Zn摩尔比为60:30时,Al和Zr的同时加入使催化剂中Cu晶粒分散最好,催化剂具有较高的低温活性,二甲醚在空速为4 922 ml/(g·h)和260℃下的转化率达到72%.
二甲醚水蒸氣重整製氫反應是燃料電池理想的供氫方式之一.探討瞭二甲醚水蒸氣重整過程中的反應與反應、反應與傳熱的耦閤協同效應.採用二甲醚水解催化劑ZSM-5(硅鋁比為25)和甲醇水蒸氣重整催化劑(Cu-Zn繫列及商用Cu-Zn-Al催化劑)混閤製得二甲醚水蒸氣重整的複閤催化劑.在固定床反應裝置中評價瞭催化劑活性併對催化劑進行瞭透射電鏡、X射線衍射及N2吸附錶徵.結果錶明,複閤催化劑的活性除瞭受催化劑組成和銅含量的影響外,還與Al和Zr的量有關.在Cu:Zn摩爾比為60:30時,Al和Zr的同時加入使催化劑中Cu晶粒分散最好,催化劑具有較高的低溫活性,二甲醚在空速為4 922 ml/(g·h)和260℃下的轉化率達到72%.
이갑미수증기중정제경반응시연료전지이상적공경방식지일.탐토료이갑미수증기중정과정중적반응여반응、반응여전열적우합협동효응.채용이갑미수해최화제ZSM-5(규려비위25)화갑순수증기중정최화제(Cu-Zn계렬급상용Cu-Zn-Al최화제)혼합제득이갑미수증기중정적복합최화제.재고정상반응장치중평개료최화제활성병대최화제진행료투사전경、X사선연사급N2흡부표정.결과표명,복합최화제적활성제료수최화제조성화동함량적영향외,환여Al화Zr적량유관.재Cu:Zn마이비위60:30시,Al화Zr적동시가입사최화제중Cu정립분산최호,최화제구유교고적저온활성,이갑미재공속위4 922 ml/(g·h)화260℃하적전화솔체도72%.
Dimethyl ether (DME) steam reforming (SR) is one possible source of hydrogen for fuel cells. The synergistic effect of catalyst coupling for the DME SR process and the coupling of reaction-heat transfer was studied. A DME hydrolysis catalyst comprising ZSM-5 (Si/A; = 25) and a series of methanol steam reforming catalysts (a series of Cu-Zn-based catalysts and a commercial Cu-Zn-Al catalyst) were used for DME SR. The evaluation of catalytic activity was conducted in a fixed-bed reactor. The catalysts were characterized by scanning electron microscopy, X-ray diffraction, and N2 adsorption. The activity and selectivity were influenced by the catalyst composition and copper content, and also the content of Al and Zr. A Cu:Zn molar ratio of 60:30 together with Al and Zr gave the best dispersion of Cu crystals and the highest low-temperature catalytic activity, with a DME conversion of 72% at 260℃ and a space velocity of 4 922 ml/(g·h).