|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 甲烷无氧芳构化制苯及芳香化合物研究进展显示文摘甲烷合成高附加值的化学品是近几年的研究热点,对于解决未来我国能源、燃料和化工产品对原油的依赖至关重要。甲烷无氧芳构化合成苯及其他芳香化合物是甲烷直接转化的有效路径,避免了有氧条件下过度氧化和二氧化碳的排放。本文综述了甲烷无氧芳构化制苯及芳香化合物的研究进展,从催化剂的制备方法、助剂的添加、原料气多组分的加入和反应器等方面进行了探讨。 | 孙建平 王磊 李洪广 朱端旭 张国权 张生军 闵小建 | 2019 | 山东化工2019，48，5： | 2 |
| 2 | Study on attrition of spherical-shaped Mo/HZSM-5 catalyst for methane dehydro-aromatization in a gas–solid fluidized bed显示文摘As a potential methane efficient conversion process,non-oxidative aromatization of methane in fluidized bed requires a catalyst with good attrition resistance,especially in the states of high temperature,longtime rapid movement and chemical reaction.Existing evaluation methods for attrition resistance,such as ASTM D5757 and Jet Cup test,are targeted for fresh catalysts at ambient temperature,which cannot well reflect the real process.In this study,spherical-shaped Mo/HZSM-5 catalyst prepared by dipping and spray drying was placed in a self-made apparatus for attrition testing,in which the catalyst attrition under different system temperatures,running time and process factors was investigated with percent mass loss(PML),particle size-mass distribution(PSMD)and scanning electron microscope(SEM).Carbon deposition on the catalyst before and after activation,aromatization and regeneration was analyzed by thermogravimetry(TG),and the attrited catalysts were evaluated for methane dehydro-aromatization(MDA).The results show that the surface abrasion and body breakage of catalyst particles occur continuously,with the increase of system temperature and running time,and make the PML rise gradually.The process factors of activation,aromatization and regeneration can cause the catalyst attrition and carbon deposits,which broaden the PSMD in varying degrees,and the carbon-substances on catalysts greatly improve their attrition resistance at high temperature.Catalyst attrition has a certain influence on its catalytic performance,and the main reasons point to particle breakage and fine powder escape. | Xinzhuang Zhang Yunda Han Dapeng Li Zhanguo Zhang Xiaoxun Ma | 2021 | Chinese Journal of Chemical Engineering2021，34，10： | 1 |
| 3 | 甲烷催化裂解法多壁碳纳米管的除杂提纯显示文摘针对甲烷催化裂解法自制多壁碳纳米管(MWCNTs)中的催化剂残留(灰分)和碳杂质,研究常温HCl或NaOH溶液溶灰与高温空气氧化或H_(2)甲烷化碳杂质相结合的除杂效果。表征提纯前后MWCNTs样品的空气氧化热失重曲线,结合GB/T 36065-2018中观点和处理方法,对特征组分和关键温度进行量化,并在扫描电子显微镜下观察样品形貌变化。结果表明,常温HCl溶液(36.0%~38.0%)可溶解去除大部分Fe[O]/γ-Al_(2)O_(3)灰分,而常温NaOH溶液(2 mol·L^(-1))对较为活泼的还原态Fe/Al灰分有较好的去除效果;500℃和530℃空气氧化均无法选择性去除碳杂质,且会同步消耗较多MWCNTs,而660℃和730℃H2甲烷化能去除部分碳杂质,并还原氧化态灰分;730℃H_(2)搭配常温NaOH溶液处理可获得纯度较佳的MWCNTs产品;部分MWCNTs与杂质紧密结合/接触,除杂的同时其结构也会被破坏。常温液相除灰和高温气相除碳杂质的工艺和设备存在较大差异,无法连续化操作,且非目标杂质的存在往往会影响目标杂质的去除效果,因此有必要探索MWCNTs的“制备-提纯”一体化方法。 | 张新庄 王姗姗 裴婷 张铎 郭淑静 张伟 | 2021 | 工业催化2021，29，12： | 0 |
| 4 | 基于CPFD方法的甲烷无氧芳构化流化床反应器数值模拟显示文摘基于计算颗粒流体力学(CPFD)方法对甲烷无氧芳构化催化反应/催化剂再生系统中的流化床反应器进行了数值模拟,并将模拟结果与实验结果进行比较,验证了CPFD模拟的可行性。通过模拟得到了反应器内整体气固流动状态、气相各组分浓度分布及催化剂积碳含量分布等,考察了不同操作条件如甲烷进料流量及反应器内催化剂存留量对气固两相流动及甲烷无氧芳构化反应性能的影响。结果表明,甲烷进料流量增加会降低甲烷转化率,提高芳烃选择性;反应器内催化剂存留量增加会加剧床内气固两相的返混程度,提高甲烷转化率,降低芳烃选择性。 | 司金凤 龚明 冀晓姣 刘星 马晓迅 | 2024 | 过程工程学报2024，24，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员