Influence of modification of supported palladium systems by polymers: PVP, AMPS and AcrAMPS on their catalytic properties in the reaction of transformation of biomass into fuel bio-components
Influence of modification of supported palladium systems by polymers: PVP, AMPS and AcrAMPS on their catalytic properties in the reaction of transformation of biomass into fuel bio-components
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DOI：
10.1016/j.fuel.2020.117584
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发表时间：
2020-07
期刊：
影响因子：
7.4
通讯作者：
E. Szubiakiewicz;M. Modelska;M. Brzezinska;M. Binczarski;C. Severino;A. Stanishevsky;I. Witonska
中科院分区：
文献类型：
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作者：
E. Szubiakiewicz;M. Modelska;M. Brzezinska;M. Binczarski;C. Severino;A. Stanishevsky;I. Witonska
制备了以PVP、AMPS和AcrAMPS改性的SiO2为载体的高分散Pd纳米粒子催化体系，并将其用于食品工业废弃生物质（甜菜浆、甜菜叶和酿酒糟）水相酸水解所得糠醛的加氢反应。Pd/PVP/SiO2催化剂中Pd含量为50 g/1 kg时，活性较高，但对四氢呋喃的选择性低于Pd/AMPS-SiO2或Pd/AcrAMPS-SiO2催化剂。通过PVP改性SiO2，然后负载钯催化剂，限制了羰基对糠醛的吸附，这可能导致四氢呋喃生成的改善，这一点通过FTIR研究得到证实。采用XRD、CO化学吸附、TPR H2、TG-DTA-MS和BET等技术对钯催化剂的物化性能进行了表征。ICP-AES表明糠醛还原过程中没有金属浸出到环境中，证实了Pd/PVP/SiO2、Pd/AMPS-SiO2和Pd/AcrAMPS-SiO2体系在所研究过程中的稳定性。
Catalytic systems based on highly dispersed Pd nanoparticles deposited on SiO2modified with PVP, AMPS and AcrAMPS were prepared and used in the hydrogenation of furfural obtained by the aqueous phase acidic hydrolysis of waste biomass (sugar beet pulp, sugar beet leaves, and brewing grain) from the food industry. Pd/PVP/SiO2catalysts containing 50 g of Pd per 1 kg of catalyst were characterized by high activity in studied process, but lower selectivity to THFA in comparison to Pd/AMPS-SiO2or Pd/AcrAMPS-SiO2catalysts. The modification of SiO2by PVP followed by the palladium catalyst loading, limited the adsorption of furfural by carbonyl group which probably leads to the improvement in THFA formation, which was confirmed by FTIR studies. The physico-chemical properties of the obtained palladium catalysts were investigated by XRD, CO chemisorption, TPR H2, TG-DTA-MS and BET techniques. The ICP-AES indicated no leaching of metal into the environment during furfural reduction, which confirms the stability of the Pd/PVP/SiO2, Pd/AMPS-SiO2and Pd/AcrAMPS-SiO2systems in the studied process.