化学吸附法脱除FCC汽油中含硫化合物的研究

论文摘要

虽然流化催化裂化（FCC）工艺已经商业化超过60年,但是该技术仍在不断的发展以适应新的挑战。本研究提出并描述了FCC汽油吸附脱硫用的沸石吸附剂及其工艺的研究进展。为了减少液体碳氢燃料中的硫含量以加强环境保护,在镍锌脱硫吸附剂上对模拟FCC汽油进行了S-Zorb吸附。首先制备了一系列沸石吸附剂,并对它们的噻吩吸附脱硫能力进行了测试。这些吸附剂对噻吩脱除具有显著的选择性。在进一步的工作中,为筛选更好的吸附剂,用氮气吸附法对吸附剂的比表面积,总孔体积以及孔大小和平均孔径进行了分析。同时用X-射线衍射,热重分析对催化剂进行了表征。X-射线衍射图表明,ZnO颗粒与氧化镍颗粒按一定比例很好地分散在了HY沸石上,并表现出较高的结晶度。TPR等分析还显示,在350℃以上时,由于负载的Ni2+减少而减少了氢气的消耗量。在活性评价时,反应温度,压力和氢油比都在脱硫中起到了关键作用,并且吸附剂脱硫率保持在90%以上。

论文目录

• ABSTRACT
• 摘要
• Chapter Ⅰ Introduction and background
• Chapter Ⅱ Literature review
• 2.1 Type of sulfur and distribution in gasoline
• 2.2 FCC gasoline hydrodesulfurization technologies
• 2.2.1 Conventional hydrodesulfurization
• 2.2.2 Selective hydrodesulfurization
• 2.2.3 Deep hydrodesulfurization combined with octane recovery processing
• 2.3 FCC gasoline non-hydrodesulfurization technologies
• 2.3.1 Alkylation desulfurization
• 2.3.2 Extractive desulfurization
• 2.3.3 Oxidative desulfurization
• 2.3.4 Complexation desulfurization
• 2.4 FCC gasoline adsorption desulfurization technologies
• 2.4.1 Research progress in the adsorbent materials
• 2.4.2 Research progress of sorbent technology
• 2.5 Experimental contents
• Chapter Ⅲ Experimental part
• 3.1 Experimental reagents
• 3.2 Adsorbent and model feed preparation
• 3.2.1 Carriers and Chemical reagents
• 3.2.2 Adsorbent precursor preparation
• 3.2.3 Preparation of the model solution
• 3.3 Experimental process and methods
• 3.4 Experimental Conditions
• 3.4.1 Reduction conditions
• 3.4.2 Reaction conditions
• 3.4.3 Gas chromatographer operating set
• 3.5 List of the reaction equipments used
• 3.6 Experiment devises description
• 3.6.1 Temperature controller
• 3.6.2 Experimental reactor
• 3.6.3 Experiment analytical instrument
• 3.7 Adsorbent screening analytical instrument
• Chapter Ⅳ Experimental results and discussion
• 4.1 Experimental study on zeolite adsorbents desulfurization performance
• 4.1.1 Different zeolite adsorbents desulfurization performance test
• 4.1.2 Summary on the different zeolite adsorbents desulfurization test
• 4.2 Experimental study of HY-zeolite adsorbent desulfurization performance
• 4.2.1 Effect of Zn/Ni molar ratios on the sorbent desulfurization performance
• 4.2.2 Characterization of different Zn/Ni molar ratios adsorbents
• 4.2.3 Summary of different Zn/Ni molar ratios effects
• 4.2.4 Effect of carrier different proportions on the adsorbent desulfurization performance
• 4.2.5 Adsorbents Nitrogen adsorption test
• 4.2.6 Summary of carrier different proportions effect on the adsorbent desulfurization performance
• 4.3 Effect of calcination temperatures on the adsorbents desulfurization performance
• 4.3.1 Summary of calcination temperatures effect
• 4.3.2 Adsorbent thermogravimetric analysis （TGA）
• 4.4 Effect of catalyst reduction time on the adsorption desulfurization performance
• 4.4.1 Summary of catalysts reduction times effect
• 4.4.2 Temperature programmed reduction （TPR） of catalyst
• 4.5 Effect of reaction conditions on the adsorption desulfurization performance
• 2/Oil ratios on the adsorption desulfurization performance'>4.5.1 Effect of H₂/Oil ratios on the adsorption desulfurization performance
• 2/Oil ratios effect on the adsorption desulfurization performance'>4.5.2 Summary of H₂/Oil ratios effect on the adsorption desulfurization performance
• 4.5.3 Effect of reaction temperatures on the adsorption desulfurization performance
• 4.5.4 Summary of reaction temperatures effect on the adsorption desulfurization performance
• 4.5.5 Effect of reaction pressures on the adsorption desulfurization performance
• 4.5.6 Summary of reaction pressure effect on the adsorption desulfurization performance
• 4.6 XRD analysis for ZnO/NiO adsorbent before and after desulfurization reaction
• Conclusion
• References
• Acknowledgment
• 卷内备考表