Adzahar Nur Athirah, Asikin-Mijan N, Saiman Mohd Izham, Alsultan G Abdulkareem, Mastuli M S, Shamsuddin Mohd Razali, Taufiq-Yap Y H
Catalysis Science and Technology Research Centre, Faculty of Science, Universiti Putra Malaysia UPM Serdang Selangor 43400 Malaysia
Department of Chemistry, Faculty of Science, Universiti Putra Malaysia UPM Serdang Selangor 43400 Malaysia
RSC Adv. 2022 Jun 8;12(26):16903-16917. doi: 10.1039/d2ra00853j. eCollection 2022 Jun 1.
Concerns over global greenhouse gas emissions such as CO and NO as well as the depletion of petroleum fossil resources have motivated humankind to seek an alternative energy source known as green diesel. In this study, green diesel was produced a deoxygenation (DO) reaction of ceiba oil under a H-free atmosphere over Ni modified red mud-based catalysts, which have been synthesized a precipitation - deep-deposition assisted autoclave method. The obtained catalyst was further characterized by XRF, XRD, BET, FTIR, TPD-NH, FESEM, and TGA. Based on the catalytic activity test, all Ni/RMO catalysts facilitated greater DO activity by yielding 83-86% hydrocarbon yield and 70-85% saturated diesel -(C + C) selectivity. Ni/RMO was the best catalyst for deoxygenizing the ceiba oil owing to the existence of a high acidic strength (12717.3 μmol g) and synergistic interaction between Fe-O and Ni-O species, thereby producing the highest hydrocarbon yield (86%) and -(C + C) selectivity (85%). According to the reusability study, the Ni/RMO could be reused for up to six consecutive runs with hydrocarbon yields ranging from 53% to 83% and -(C + C) selectivity ranging from 62% to 83%.
对全球温室气体排放（如二氧化碳和氮氧化物）以及石油化石资源枯竭的担忧促使人类寻求一种被称为绿色柴油的替代能源。在本研究中，绿色柴油是通过在无氢气氛下，以镍改性的赤泥基催化剂对木棉油进行脱氧（DO）反应制得的，这些催化剂是采用沉淀 - 深度沉积辅助高压釜法合成的。通过X射线荧光光谱仪（XRF）、X射线衍射仪（XRD）、比表面积分析仪（BET）、傅里叶变换红外光谱仪（FTIR）、程序升温脱附 - 氨（TPD - NH）、场发射扫描电子显微镜（FESEM）和热重分析仪（TGA）对所得催化剂进行了进一步表征。基于催化活性测试，所有的镍/赤泥催化剂通过产生83 - 86%的烃产率和70 - 85%的饱和柴油（C₁₅⁺C₁₅）选择性促进了更高的脱氧活性。由于存在高酸性强度（12717.3 μmol g）以及铁 - 氧和镍 - 氧物种之间的协同相互作用，镍/赤泥是木棉油脱氧的最佳催化剂，从而产生了最高的烃产率（86%）和（C₁₅⁺C₁₅）选择性（85%）。根据可重复使用性研究，镍/赤泥可以连续重复使用多达六次，烃产率范围为53%至83%，（C₁₅⁺C₁₅）选择性范围为62%至83%。
