当前位置：
X-MOL 学术
›
React. Chem. Eng.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Synthesis of modified amphiphilic quaternary ammonium silicotungstate and its application in heterogeneous catalytic oxidative desulfurization
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2022-05-27 , DOI: 10.1039/d2re00158f Yanwen Guo 1 , Xingjian Liu 1 , Bing Hu 1
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2022-05-27 , DOI: 10.1039/d2re00158f Yanwen Guo 1 , Xingjian Liu 1 , Bing Hu 1
Affiliation
|
A series of novel modified amphiphilic quaternary ammonium phosphotungstate catalysts with a Keggin structure were synthesized. Their physical and chemical properties were characterized by FT-IR, XRD, SEM, and TG-DSC. Heterogeneous catalytic oxidation desulfurization was carried out with dibenzothiophene (DBT) as a typical organic sulfide to be removed in n-octane and H2O2 as the oxidant. The effects of different quaternary ammonium salt structures on the desulfurization effect were studied. By the optimization of experimental conditions, the desulfurization efficiency of the catalyst hexadecyl trimethyl ammonium silicotungstate (HTA)4SiW could reach 98.42% under the following optimal reaction conditions: 50 °C, a H2O2/DBT molar ratio (O/S) of 10 : 1, 0.2 g (HTA)4SiW and 75 min. The catalyst (HTA)4SiW could be recycled 5 times, and the recovered (HTA)4SiW still exhibited a stable chemical structure and achieved the purpose of deep desulfurization. Finally, the possible desulfurization mechanism was proposed.
中文翻译：
改性两亲性硅钨酸季铵盐的合成及其在多相催化氧化脱硫中的应用
合成了一系列具有 Keggin 结构的新型改性两亲性季铵磷钨酸盐催化剂。采用FT-IR、XRD、SEM和TG-DSC对其物理化学性质进行了表征。以二苯并噻吩（DBT）为典型的有机硫化物在正辛烷中脱除，H 2 O 2为氧化剂进行多相催化氧化脱硫。研究了不同季铵盐结构对脱硫效果的影响。通过对实验条件的优化，催化剂十六烷基三甲基硅钨酸铵（HTA）4 SiW在以下最佳反应条件下脱硫效率可达98.42%：50 ℃，a H 2O 2 /DBT 摩尔比 (O/S) 为 10 : 1、0.2 g (HTA) 4 SiW 和 75 分钟。催化剂(HTA) 4 SiW 可循环使用5次，回收的(HTA) 4 SiW仍表现出稳定的化学结构，达到深度脱硫的目的。最后提出了可能的脱硫机理。
更新日期：2022-05-27
中文翻译：
改性两亲性硅钨酸季铵盐的合成及其在多相催化氧化脱硫中的应用
合成了一系列具有 Keggin 结构的新型改性两亲性季铵磷钨酸盐催化剂。采用FT-IR、XRD、SEM和TG-DSC对其物理化学性质进行了表征。以二苯并噻吩（DBT）为典型的有机硫化物在正辛烷中脱除，H 2 O 2为氧化剂进行多相催化氧化脱硫。研究了不同季铵盐结构对脱硫效果的影响。通过对实验条件的优化，催化剂十六烷基三甲基硅钨酸铵（HTA）4 SiW在以下最佳反应条件下脱硫效率可达98.42%：50 ℃，a H 2O 2 /DBT 摩尔比 (O/S) 为 10 : 1、0.2 g (HTA) 4 SiW 和 75 分钟。催化剂(HTA) 4 SiW 可循环使用5次，回收的(HTA) 4 SiW仍表现出稳定的化学结构，达到深度脱硫的目的。最后提出了可能的脱硫机理。
京公网安备 11010802027423号