CAJ | 학술논문

采用共沉淀法,制备了纤维状CD501甲醇合成催化剂,采用SEM、TEM、XRD和BET等手段对催化剂进行了表征;并将其进一步和γ-Al_2O_3进行混合,获得了Cu/ZnO/Al_2O_3/ZrO_2+γ-Al_2O_3双功能催化剂,考察了其在浆态床中一步法合成二甲醚过程的催化特性.结果表明,相比商业催化剂(COM)和LP201催化剂,新型的CD501催化剂具有更大的比表面积和Cu/Zn分散性.对于浆态床中一步法合成二甲醚过程,采用CD501与γ-Al_2O_3双功能催化剂,相比采用COM或LP201与γ-Al_2O_3双功能催化剂,CO转化率提高了一倍,且经过270 h测试,CO转化率从61%降至57%,二甲醚时空产率从0.54 g/(g·h)降至0.48 g/(g·h),稳定性显著优于COM催化剂.当反应温度为250 ℃,压力为4.0 Mpa,空速为3 000 mL/(g·h),氢碳比为1.0时,该催化剂应用在浆态床一步法合成二甲醚时,CO转化率为61%,DME时空产率达到0.54 g/(g·h).
채용공침정법,제비료섬유상CD501갑순합성최화제,채용SEM、TEM、XRD화BET등수단대최화제진행료표정;병장기진일보화γ-Al_2O_3진행혼합,획득료Cu/ZnO/Al_2O_3/ZrO_2+γ-Al_2O_3쌍공능최화제,고찰료기재장태상중일보법합성이갑미과정적최화특성.결과표명,상비상업최화제(COM)화LP201최화제,신형적CD501최화제구유경대적비표면적화Cu/Zn분산성.대우장태상중일보법합성이갑미과정,채용CD501여γ-Al_2O_3쌍공능최화제,상비채용COM혹LP201여γ-Al_2O_3쌍공능최화제,CO전화솔제고료일배,차경과270 h측시,CO전화솔종61%강지57%,이갑미시공산솔종0.54 g/(g·h)강지0.48 g/(g·h),은정성현저우우COM최화제.당반응온도위250 ℃,압력위4.0 Mpa,공속위3 000 mL/(g·h),경탄비위1.0시,해최화제응용재장태상일보법합성이갑미시,CO전화솔위61%,DME시공산솔체도0.54 g/(g·h).
A fibrous CD501 methanol synthesis catalyst was prepared by a novel coprecipation method and characterized by SEM, TEM, XRD and BET. For Cu/ZnO/Al_2O3_/ZrO_2+γ-Al_2O_3 bifunctional catalyst which is a mixture of CD501 and γ-Al_2O_3, the catalytic performance for dimethyl ether (DME) synthesis was evaluated in a slurry reactor. The characterization showed that the CD501 catalyst had a larger specific surface area and a higher Cu/Zn dispersion than those of a commercial catalyst (COM) and LP201 catalyst. For the DME synthesis in a slurry reactor using CD501+γ-Al_2O_3 catalyst, the CO conversion is twice as that on the COM+γ-Al_2O_3 or LP201+γ-Al_2O_3 catalyst. After 270 h test, the CO conversion decreased from 61% to 57%, the space time yield of DME decreased from 0.54 g/(g·h) to 0.48 g/(g·h), respectively. Compared with COM catalyst, the stability of the present reported catalyst was much improved.When reaction temperature is 250 ℃, pressure 4.0 Mpa, space velocity 3 000 mL/(g·h), and H/C mol ratio 1.0, the CO conversion reached 61%, and space time yield of DME reached 0.54 g/(g·h).