Synthesis and characterization of 12-tungstophosphoric acid intercalated layered double hydroxides and their application as esterification catalysts for deacidification of crude oil
Synthesis and characterization of 12-tungstophosphoric acid intercalated layered double hydroxides and their application as esterification catalysts for deacidification of crude oil
复制标题
12-钨磷酸插层状双氢氧化物的合成、表征及其在原油脱酸酯化催化剂中的应用
DOI：
10.1016/j.clay.2017.09.007
复制
发表时间：
2017-12
影响因子：
5.6
通讯作者：
Wang Hao
中科院分区：
文献类型：
--
作者：
Wu Yan;Liu Xinyue;Lei Yanqing;Qiu Yue;Wang Menglu;Wang Hao
12-采用离子交换法制备了钨磷酸（H3 PW 12 O 40，HPW）插层水滑石（LDH）（M2 +/Al 3 += 2，M2 += Mg 2+，Zn 2+，Ni 2+）。所制备的LDH在8.4°附近显示出较强的反射，对应于1.05 nm的基底间距，这在几乎所有文献中被认为是杂多酸盐或聚钨酸盐插层LDH。进一步的系统实验和表征表明，这种反射是由于HPW的插入，HPW可以与层间空位接枝，并在层间以C2轴垂直于层的方向取向。对乙二醇与原油中环烷酸的酯化反应，HPW插层LDH的催化活性高于硝酸根LDH。结果表明，酸性中心的总量对酯化活性起主导作用。由于固定化了HPW活性中心，增大了层间距，HPW插层LDH可作为层间催化反应器提高酯化反应活性。
12-tungstophosphoric acid (H3PW12O40, HPW) intercalated layered double hydroxides (LDH) (M2 +/Al3 += 2, M2 += Mg2 +, Zn2 +, Ni2 +) were prepared by an ion-exchange method. The as-prepared LDH show a strong reflection around 8.4° corresponding to a basal spacing of 1.05 nm, which is considered as heteropolyacid salts or polytungstate intercalated LDH in almost all literature. Further systemic experiments and characterizations demonstrated that such reflection can be attributed to the intercalation of HPW, in which HPW may graft with the vacancies in the layer and orient in the interlayer with the C2axis perpendicular to the layers. HPW intercalated LDH show higher catalytic activity than nitrate LDH for the esterification between ethylene glycol and naphthenic acids in crude oil. It is found that the total amount of acidic sites dominates the esterification activity. Due to the immobilized HPW active sites and the enlarged interlayer space, HPW intercalated LDH may act as an interlayer catalytic reactor to improve the esterification activity.
登录
查看更多内容
影响因子：
7.3
作者：
Peng Liu;Changhao Wang;Can Li
通讯作者：
Peng Liu;Changhao Wang;Can Li
影响因子：
4.6
作者：
Kagunya, W;Hassan, Z;Jones, W
通讯作者：
Jones, W
DOI：
10.1557/proc-233-63
发表时间：
1991
期刊：
MRS Proceedings
影响因子：
--
作者：
J. Wang;Ying Tian;R. Wang;J. Colón;A. Clearfield
通讯作者：
J. Wang;Ying Tian;R. Wang;J. Colón;A. Clearfield
影响因子：
3.7
作者：
K. Parida;S. Parija;J. Das;P. Mukherjee
通讯作者：
K. Parida;S. Parija;J. Das;P. Mukherjee
影响因子：
7.3
作者：
Liu, Yanyong;Murata, Kazuhisa;Sakanishi, Kinya
通讯作者：
Sakanishi, Kinya