CAJ | 학술논문

对不同使用时间的HZSM-5分子筛在线催化提质制取的生物油进行理化特性和成分分析，从生物油品质角度对HZSM-5的催化性能进行评价；并采用TG、BET、XRD、SEM和TEM等方法对失活的HZSM-5催化剂进行表征分析，探讨了HZSM-5催化提质生物油的失活机理，并进行再生研究。研究表明，HZSM-5分子筛可转化生物油中的酸类、醛类和酮类等“非期望”有机物，生成较多“期望”有机物，如酚类和芳烃类物质，降低生物油的氧含量及酸性，提高生物油的热值；HZSM-5使用80 min后，生物油品质明显变差，催化剂活性明显降低；失活催化剂上沉积的焦炭主要呈纤维状，同时，还存在少量石墨状焦炭，焦炭总量达14．12％，且使用过程中催化剂的比表面积和孔容均下降，晶粒的团聚现象加剧，结晶度下降；在催化提质过程中，在孔道内生成的石墨状焦炭及在表面形成的纤维状焦炭大量覆盖活性位点，使得催化剂失活。经550℃再生后，催化剂可恢复催化性能。
대불동사용시간적HZSM-5분자사재선최화제질제취적생물유진행이화특성화성분분석，종생물유품질각도대HZSM-5적최화성능진행평개；병채용TG、BET、XRD、SEM화TEM등방법대실활적HZSM-5최화제진행표정분석，탐토료HZSM-5최화제질생물유적실활궤리，병진행재생연구。연구표명，HZSM-5분자사가전화생물유중적산류、철류화동류등“비기망”유궤물，생성교다“기망”유궤물，여분류화방경류물질，강저생물유적양함량급산성，제고생물유적열치；HZSM-5사용80 min후，생물유품질명현변차，최화제활성명현강저；실활최화제상침적적초탄주요정섬유상，동시，환존재소량석묵상초탄，초탄총량체14．12％，차사용과정중최화제적비표면적화공용균하강，정립적단취현상가극，결정도하강；재최화제질과정중，재공도내생성적석묵상초탄급재표면형성적섬유상초탄대량복개활성위점，사득최화제실활。경550℃재생후，최화제가회복최화성능。
The online catalytic cracking of bio-oil over HZSM-5 was investigated.The HZSM-5 catla yst samples used for different reaction times were analyzed in terms of physicochemicalp roperties and chemical compositions to investigate the effects of bio-oil catalytic online cracking.Simultaneously, the used HZSM-5 catalysts were analyzed by TG, BET, XRD, SEM and TEM to explore the mechanism of HZSM-5 catalyst deactivation.The regeneration of the deactivated catalyst was also studied.It was found that acids, aldehydes and ketones as the undesirable organics contained in the bio-oil were reduced by deoxidization over HZSM-5 and more desirable organics like phenols and aromatic hydrocarbons could be produced.Meanwhile, the activity of the catalyst declined after 80 min reaction, leading to the worse quality of the refined bio-oil.The coke deposited was mainly fibrous carbon with a little graphite carbon, where the total amount of the coke was 14.12%.The graphite coke deposited ni sied the pore of the catalyst and the fibrous oc ke ed posited outis de the surface of the cta alyst were contributed to the deactivation of the catalyst. The basic structure of the catalyst remained unchanged, but the specific area and pore volume of the catalyst were decreased simultaneously and the agglomeration of grain was increased, leadi ng to the decrease of crystallinity.Thec hange of somecr ystal structure of the catalyst resulted in the deactivation of catalyst.After the regeneration, the catalytic activity could be recoveried.