Kaewtrakulchai Napat, Fuji Masayoshi, Eiad-Ua Apiluck
College of Materials Innovation and Technology, King Mongkut's Institute of Technology Bangkok 10520 Thailand
Kasetsart Agricultural and Agro-Industrial Product Improvement Institute, Kasetsart University Bangkok 10900 Thailand.
RSC Adv. 2022 Sep 13;12(40):26051-26069. doi: 10.1039/d2ra03496d. eCollection 2022 Sep 12.
Palm oil conversion into green diesel by catalytic deoxygenation (DO) is one of the distinctive research topics in biorefinery towards a bio-circular-green economic model to reduce the greenhouse gas emissions. In this study, palm fiber waste was explored as an alternative precursor for the preparation of activated biochar as a support material. A new series of nickel phosphide (Ni-P) and iron phosphide (Fe-P) catalysts supported on palm fiber activated biochar (PFAC) was synthesized by wetness impregnation, and extensive characterization was performed by several techniques to understand the characteristics of the supported metal phosphide catalysts prior to palm oil deoxygenation for producing of green diesel (C-C hydrocarbons). The PFAC support exhibited suitable physicochemical properties for catalyst preparation, such as high carbon content, and high porosity ( of 1039.64 m g with of 0.572 cm g). The high porosity of the catalyst support (PFAC) significantly promotes the metal phosphide nanoparticle dispersion. The DO of palm oil was tested in a trickle bed down flow reactor under hydrogen atmosphere. The outstanding catalytic performance of supported Ni-P and Fe-P catalysts provided an impressive liquid hydrocarbon yield between 63.37 and 79.65% with the highest green diesel selectivity of 62.64%. Decarbonylation (DCO) and decarboxylation (DCO) are the main pathways for the relative phosphide catalysts as presented by the high number of C atoms (C and C hydrocarbons). In addition, metal phosphide/PFAC catalysts could achieve great potential application as a promising alternative catalyst for biofuel production deoxygenation for large-scale operation owing to their excellent catalytic activity, simple preparation, and utilization of sustainable resources.
通过催化脱氧（DO）将棕榈油转化为绿色柴油是生物炼制领域中一个独特的研究课题，旨在实现生物循环绿色经济模式以减少温室气体排放。在本研究中，探索了棕榈纤维废料作为制备活性生物炭作为载体材料的替代前驱体。通过湿浸渍法合成了一系列负载在棕榈纤维活性生物炭（PFAC）上的新型磷化镍（Ni-P）和磷化铁（Fe-P）催化剂，并采用多种技术进行了广泛表征，以了解负载型金属磷化物催化剂在用于生产绿色柴油（C-C烃类）的棕榈油脱氧之前的特性。PFAC载体表现出适合催化剂制备的物理化学性质，如高碳含量和高孔隙率（1039.64 m g，0.572 cm g）。催化剂载体（PFAC）的高孔隙率显著促进了金属磷化物纳米颗粒的分散。在滴流床向下流动反应器中，在氢气气氛下对棕榈油的脱氧进行了测试。负载型Ni-P和Fe-P催化剂出色的催化性能提供了令人印象深刻的液态烃产率，介于63.37%和79.65%之间，最高绿色柴油选择性为62.64%。脱羰（DCO）和脱羧（DCO）是相关磷化物催化剂的主要途径，这由大量的C原子（C和C烃类）所表明。此外，金属磷化物/PFAC催化剂由于其优异的催化活性、简单的制备方法以及对可持续资源的利用，在大规模生物燃料生产脱氧方面作为一种有前景的替代催化剂具有巨大的潜在应用价值。
