Catalytic depolymerization of calcium lignosulfonate by NiMgFeO_x derived from sub-micron sized NiMgFe hydrotalcite prepared by introducing hydroxyl compounds  

作　　者：Hongjing Han Jinxin Li Haiying Wang Feng Xue Yanguang Chen Yanan Zhang Yizhen Wang Mei Zhang 

机构地区：[1]School of Chemistry&Chemical Engineering,Northeast Petroleum University,Daqing 163318,China [2]Heilongjiang Provincial Key Laboratory of Oil&Gas Chemical Technology,Daqing 163318,China [3]Shandong Sinocera Functional Material Co.,Ltd,Dongying 257000,China

出　　处：《Chinese Journal of Chemical Engineering》2019年第8期1933-1938,共6页中国化学工程学报（英文版）

基　　金：Supported by the Program for National Natural Science Foundation of China(No.51674089);Excellent Youth Foundation of Heilongjiang Province of China(No.JC2018002);Postdoctoral Scientific Research Development Fund of Heilongjiang Province of China(No.LBH-Q16037);the Youth Fund of Northeast Petroleum University(No.2018QNL-17);the Postgraduate Innovative Research Projects of Northeast Petroleum University(No.YJSCX2017-014NEPU)

摘　　要：A new method for regulating the synthesis of Ni Mg Fe hydrotalcites(NMF LDHs) with the addition of hydroxyl compounds was proposed. A series of NMF LDHs were prepared by the above method, and then were calcined to obtain the Ni Mg FeOx(NMFOx) samples. The NMFOxsamples were characterized by XRD,SEM, TG-DTG, XPS and CO2-TPD, respectively. The catalytic performance of NMFOxfor depolymerizing calcium lignosulfonate(CLS) was evaluated by hydrothermal reaction. The results showed that the addition of hydroxyl compounds favored reducing the particle sizes of NMF LDHs. For the depolymerization of CSL, the yield of liquid product increased from 45% to 75.8% with the addition of NMFOx-ethanol(NMFOxET). The liquid products were mainly phenolics, aromatics, ketones and esters. The total selectivity of oxy-containing compounds was over 90.6%, among them, the phenolics were approximately 35.2%. The valence of Ni and Fe, crystalline phase and basicity almost remained unchanged. The NMFOx-ET samples were recycled for the depolymerization of CLS, moreover, the NMFOx-ET samples had high activity and stability after 4 cycles.A new method for regulating the synthesis of Ni Mg Fe hydrotalcites(NMF LDHs) with the addition of hydroxyl compounds was proposed. A series of NMF LDHs were prepared by the above method, and then were calcined to obtain the Ni Mg Fe Ox(NMFOx) samples. The NMFOxsamples were characterized by XRD,SEM, TG-DTG, XPS and CO2-TPD, respectively. The catalytic performance of NMFOxfor depolymerizing calcium lignosulfonate(CLS) was evaluated by hydrothermal reaction. The results showed that the addition of hydroxyl compounds favored reducing the particle sizes of NMF LDHs. For the depolymerization of CSL, the yield of liquid product increased from 45% to 75.8% with the addition of NMFOx-ethanol(NMFOxET). The liquid products were mainly phenolics, aromatics, ketones and esters. The total selectivity of oxy-containing compounds was over 90.6%, among them, the phenolics were approximately 35.2%. The valence of Ni and Fe, crystalline phase and basicity almost remained unchanged. The NMFOx-ET samples were recycled for the depolymerization of CLS, moreover, the NMFOx-ET samples had high activity and stability after 4 cycles.

关 键 词：HYDROTALCITE CALCIUM LIGNOSULFONATE DEPOLYMERIZATION Oxy-containing compounds 

分 类 号：O64[理学—物理化学]