CAJ | 학술논문

甲烷无氧芳构化(MDA)和甲烷水蒸气重整(MSR)的耦合反应可以大幅度提高甲烷无氧芳构化反应的稳定性.单独的甲烷无氧芳构化反应失活较快,甲烷转化率从0.5 h的14.5%很快下降至15 h的3.5%.而采用联合MSR/MDA反应体系,甲烷的转化率从12.5 h的11.5%非常缓慢地下降至60 h后的6.5%.MSR反应原位生成的CO和H_2能降低反应中生成的CHr物种数量,减少催化剂上积炭的牛成,进而延长反应时间.MSR反应过程中高比例H_2的生成更能有效地减少与B酸相关的积炭的生成,从而更好地抑制反应的失活.
갑완무양방구화(MDA)화갑완수증기중정(MSR)적우합반응가이대폭도제고갑완무양방구화반응적은정성.단독적갑완무양방구화반응실활교쾌,갑완전화솔종0.5 h적14.5%흔쾌하강지15 h적3.5%.이채용연합MSR/MDA반응체계,갑완적전화솔종12.5 h적11.5%비상완만지하강지60 h후적6.5%.MSR반응원위생성적CO화H_2능강저반응중생성적CHr물충수량,감소최화제상적탄적우성,진이연장반응시간.MSR반응과정중고비례H_2적생성경능유효지감소여B산상관적적탄적생성,종이경호지억제반응적실활.
The durability of methane dehydroaromatization (MDA) has been improved by its combination with methane steam reforming (MSR). The methane conversion in the combined MSR/MDA system decreases very slowly from 11.5% at 12.5 h to 6.5% at 60 h, whereas it decreases rapidly from 14.5% at 0.5 h to 3.5% at 15 h for the MDA reaction alone. CO and H_2 produced in-situ through the MSR reaction may reduce the amount of CH, species during the reaction, which in turn reduces the formation of coke deposited on the catalyst, prolonging the durability of the MDA reaction. High content of H_2 from the MSR process plays a major role in suppressing coke accumulation on the catalyst, especially the coke associated with the Bronsted acidic sites that are mainly responsible for the deactivation.