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From medium chain fatty alcohol to jet fuel: Rational integration of selective dehydration and hydro-processing
Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2017-11-12 , DOI: 10.1016/j.apcata.2017.11.009
Mingli He , Meng Wang , Guanglu Tang , Yunming Fang , Tianwei Tan

Middle chain fatty alcohols, which can be easily obtained from bio-synthesis and fatty acid hydro-treatment, were used as a renewable resource to produce alternative jet fuels by rational integration of selective dehydration and hydro-processing. Various catalysts such as ZSM-22, Al-MCF and ZSM-5 with different textural and acidic properties were tested in the dehydration step. It was found that the structural and acidic properties have significant influences on the dehydration performance and product distribution. After Pt introduction, the fatty alcohols can be converted into paraffins with different isomerization degrees. The different integrations of dehydration and hydro-processing steps resulted in different medium chain fatty alcohol to jet fuel production processes. Three different production processes, one-step hydro-isomerization over Pt/ZSM-22, dehydration (Al-MCF)/hydro-isomerization (Pt/ZSM-22) and dehydration (ZSM-22)/hydro-processing (Pt/MCF) were developed and tested. The dehydration (Al-MCF)/hydro-isomerization (Pt/ZSM-22) process, which provides the highest iso-paraffin yield, was used for conversion of a commercially available alcohol mixture in a pilot scale reactor. The product obtained from such pilot scale experiment had a freezing point of <−60 °C and met the requirements of ASTM 7566 specification except for density.



中文翻译:

从中链脂肪醇到航空燃料:选择性脱水和加氢处理的合理整合

可通过生物合成和脂肪酸加氢处理轻松获得的中链脂肪醇,被用作可再生资源,通过选择性脱水和加氢处理的合理整合来生产代用喷气燃料。在脱水步骤中测试了具有不同质地和酸性性质的各种催化剂,例如ZSM-22,Al-MCF和ZSM-5。发现结构和酸性性质对脱水性能和产物分布具有显着影响。引入Pt后,脂肪醇可以转化为具有不同异构化度的链烷烃。脱水和加氢处理步骤的不同集成导致了喷气发动机生产过程中使用不同的中链脂肪醇。三种不同的生产工艺,开发并测试了Pt / ZSM-22上的一步加氢异构化,脱水(Al-MCF)/加氢异构化(Pt / ZSM-22)和脱水(ZSM-22)/加氢处理(Pt / MCF) 。提供最高异链烷烃收率的脱水(Al-MCF)/加氢异构化(Pt / ZSM-22)工艺用于在中试规模反应器中转化市售醇混合物。从这种中试规模的实验中获得的产品的凝固点为<−60°C,除密度外,符合ASTM 7566规范的要求。在中试规模的反应器中,使用R 2转化市售醇混合物。从这种中试规模的实验中获得的产品的凝固点为<−60°C,除密度外,符合ASTM 7566规范的要求。在中试规模的反应器中,使用R 2转化市售的醇混合物。从这种中试规模的实验中获得的产品的凝固点为<−60°C,除密度外,符合ASTM 7566规范的要求。

更新日期:2017-11-12
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