当前位置：
X-MOL 学术
›
ACS ES&T 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.)
One-Pot Cascade Catalysis of Dehydrochlorination of Greenhouse Gas HCFC-142b and Hydrochlorination of Acetylene for the Spontaneous Production of VDF and VCM
ACS ES&T Engineering ( IF 7.4 ) Pub Date : 2021-11-30 , DOI: 10.1021/acsestengg.1c00331 Lichun Li 1 , Xiaoli Wei 1 , Shenglan Zhou 1 , Zhongsheng Jia 1 , Chuanzhao Wang 1 , Houlin Yu 1 , Sen Wu 1 , Ying Li 1 , Wenfeng Han 1
ACS ES&T Engineering ( IF 7.4 ) Pub Date : 2021-11-30 , DOI: 10.1021/acsestengg.1c00331 Lichun Li 1 , Xiaoli Wei 1 , Shenglan Zhou 1 , Zhongsheng Jia 1 , Chuanzhao Wang 1 , Houlin Yu 1 , Sen Wu 1 , Ying Li 1 , Wenfeng Han 1
Affiliation
|
Hydrochlorofluorocarbon (HCFC) has been widely applied as the third-generation refrigerant globally, however, the global warming potential of such gases is often 100 and 1000 times higher than that of CO2. Dehydrochlorination reaction offers an encouraging strategy to transform the high-global-warming-potential gases of hydrochlorofluorocarbons (HCFCs) to low-global-warming-potential gases of hydrofluoroolefins (HFOs). However, the handling of a large amount of byproduct HCl remains one of the major challenges blocking the industrialization of dehydrochlorination of HCFC-142a for the production of vinylidene fluoride (VDF). A one-pot cascade reaction combining dehydrochlorination of HCFC-142b and hydrochlorination of acetylene was first proposed to spontaneously produce valuable monomers of VDF and vinyl chloride monomer (VCM) while eliminating the tedious HCl treatment step. Both thermodynamic calculations and experimental results validate the feasibility of the cascade reaction. Five different heterogeneous catalysts were screened for the proposed cascade reaction, including monocomponent catalyst BaF2, NAC, bifunctional BaF2/NAC catalyst, and bicomponent BaF2-NAC-S and BaF2-NAC-M catalysts. Among them, the mixed BaF2-NAC-M catalyst demonstrated the best catalytic performance, with BaF2 mainly acting as the dehydrochlorination site and NAC mainly acting as the hydrochlorination site. The corresponding reaction mechanism was also proposed.
中文翻译：
一锅法串联催化温室气体 HCFC-142b 脱氯化氢和乙炔氢氯化自生生产 VDF 和 VCM
氢氯氟烃（HCFC）作为第三代制冷剂已在全球范围内广泛应用，但此类气体的全球变暖潜势往往比 CO 2高 100 至 1000 倍. 脱氯化氢反应为将高全球升温潜能值氢氯氟烃 (HCFCs) 气体转化为低全球升温潜能值氢氟烯烃 (HFO) 气体提供了一种令人鼓舞的策略。然而，处理大量副产物 HCl 仍然是阻碍 HCFC-142a 脱氯化氢生产偏二氟乙烯 (VDF) 工业化的主要挑战之一。首次提出将 HCFC-142b 脱氯化氢和乙炔氢氯化结合的一锅级联反应，以自发产生有价值的 VDF 单体和氯乙烯单体 (VCM)，同时消除繁琐的 HCl 处理步骤。热力学计算和实验结果均验证了级联反应的可行性。2、NAC、双功能BaF 2 /NAC催化剂、双组分BaF 2 -NAC-S和BaF 2 -NAC-M催化剂。其中，混合BaF 2 -NAC-M催化剂的催化性能最好，BaF 2主要作为脱氯化氢位点，NAC主要作为氢氯化位点。还提出了相应的反应机理。
更新日期：2022-01-14
中文翻译：
一锅法串联催化温室气体 HCFC-142b 脱氯化氢和乙炔氢氯化自生生产 VDF 和 VCM
氢氯氟烃（HCFC）作为第三代制冷剂已在全球范围内广泛应用，但此类气体的全球变暖潜势往往比 CO 2高 100 至 1000 倍. 脱氯化氢反应为将高全球升温潜能值氢氯氟烃 (HCFCs) 气体转化为低全球升温潜能值氢氟烯烃 (HFO) 气体提供了一种令人鼓舞的策略。然而，处理大量副产物 HCl 仍然是阻碍 HCFC-142a 脱氯化氢生产偏二氟乙烯 (VDF) 工业化的主要挑战之一。首次提出将 HCFC-142b 脱氯化氢和乙炔氢氯化结合的一锅级联反应，以自发产生有价值的 VDF 单体和氯乙烯单体 (VCM)，同时消除繁琐的 HCl 处理步骤。热力学计算和实验结果均验证了级联反应的可行性。2、NAC、双功能BaF 2 /NAC催化剂、双组分BaF 2 -NAC-S和BaF 2 -NAC-M催化剂。其中，混合BaF 2 -NAC-M催化剂的催化性能最好，BaF 2主要作为脱氯化氢位点，NAC主要作为氢氯化位点。还提出了相应的反应机理。
京公网安备 11010802027423号