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作 者:焦毅[1] 王佳[2] 秦莉晓[2] 王健礼[1] 朱权[2] 李象远[2] 龚茂初[1] 陈耀强[1]
机构地区:[1]四川大学化学学院 绿色化学与技术教育部重点实验室,四川成都610064 [2]四川大学化工学院,四川成都610064
出 处:《催化学报》2013年第6期1139-1147,共9页
基 金:国家自然科学基金(91016002);国家高技术研究发展计划(863计划,2006AA01A119);高超声速冲压发动机技术重点实验室开放基金(20120103013)~~
摘 要:考察了整体式担载型Pt基催化剂上国产3号航空煤油(RP-3)的常压裂解反应,着重探讨了添加BaO和SrO助剂对裂解效果的影响,以及裂解时间对积炭量的影响.采用全自动吸附仪、程序升温还原、X射线光电子能谱以及X射线衍射和扫描电镜等方法对催化剂进行了表征.结果表明,在整体式担载型Pt基催化剂上RP-3裂解的总产气量比热裂解提高了39.7%;BaO或SrO助剂的添加又使其总产气量又分别提高了25.6%和37.0%;同时添加BaO和SrO的催化剂,其催化裂解总产气量则提高了96.5%.BaO和SrO助剂均可有效地抑制积炭的生成,而两者间的协同作用,进一步抑制了RP-3催化裂解过程中积炭的生成.The cracking of RP‐3 fuel over supported monolithic Pt catalysts was studied at atmospheric pressure. The influence of BaO and SrO additives on the cracking reaction was examined. The effect of reaction time on the amount of carbon deposited during cracking was investigated. The catalysts were characterized using an automatic adsorption instrument (for Brunauer‐Emmett‐Teller analysis), temperature‐programmed reduction, X‐ray photoelectron spectroscopy, X‐ray diffraction, and scanning electron microscopy. The results show that the total amount of gaseous products produced in catalytic cracking over a monolithic Pt/CA(CeO2 ‐Al2O3 )‐La‐Al2O3 (CA is a support) catalyst increased by 39.7% compared with that produced by thermal cracking. The addition of BaO or SrO improved the total amount of gaseous products by 25.6% and 37%, respectively. If BaO and SrO were simultaneously added to the monolithic Pt/CA‐La‐Al2O3 catalyst, the catalytic effect improved significantly, and the total amount of gaseous products increased by 96.5%. The addition of BaO or SrO effectively inhibits carbon deposition, and the synergistic effect of BaO and SrO additives improves the cracking reaction.
关 键 词:催化裂解 积炭 碱土金属氧化物 吸热燃料 整体式催化剂
分 类 号:TE624.9[石油与天然气工程—油气加工工程]
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