Novel nonmetal catalyst of supported tetraphenylphosphonium bromide for acetylene hydrochlorination

2019 ◽  
Vol 9 (1) ◽  
pp. 188-198 ◽  
Author(s):  
Xiaoyan Li ◽  
Yao Nian ◽  
Shanshan Shang ◽  
Haiyang Zhang ◽  
Jinli Zhang ◽  
...  
Keyword(s):  
Carbon Deposition ◽  
Catalytic Performance ◽  
Acetylene Hydrochlorination ◽  
Tetraphenylphosphonium Bromide

HCl is preferentially activated by accepting electrons from TPPB, which can promote catalytic performance and inhibit carbon deposition.

scholarly journals Carbon nanotubes supported N-promoted Pd-based catalysts for acetylene hydrochlorination

2020 ◽  
Vol 213 ◽  
pp. 01004
Author(s):  
Lu Wang ◽  
Shahid Ali ◽  
Jianxin Si ◽  
Lizhen Lian ◽  
Haijun Yan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Deposition ◽  
Critical Role ◽  
Catalytic Performance ◽  
Pd Catalyst ◽  
Impregnation Method ◽  
Pd Catalysts ◽  
Acetylene Hydrochlorination ◽  
Ultrasonic Assisted ◽  
Supported Pd

A novel N-promoted carbon nanotubes (CNT) supported Pd catalyst (PANI/CNT-Pd) was prepared by the ultrasonic-assisted impregnation method and applied in the acetylene hydrochlorination reaction successfully. Compared with the Pd-CNT catalyst, the PANI/CNT-Pd catalyst exhibited the enhanced catalytic performance with more than 91.6% acetylene conversion and 99.6% vinyl chloride selectivity during 20 h at T = 160 °C, GHSV(C2H2) = 120 h-1 and V(HCl) : V(C2H2) = 1.5. It is suggested that PANI species contained N elements have been deposited on the CNT surface and they display the critical role on the enhanced catalytic performance of PANI/CNT-Pd catalysts correlated with the less palladium loss and the carbon deposition.

scholarly journals Effect of various g-C3N4precursors on the catalytic performance of alkylorganotin-based catalysts in acetylene hydrochlorination

2020 ◽  
Vol 44 (2) ◽  
pp. 393-408 ◽  
Author(s):  
Yibo WU ◽  
Fuxiang LI ◽  
Jianwei XUE ◽  
Zhiping LV
Keyword(s):  
Catalytic Performance ◽  
Acetylene Hydrochlorination

scholarly journals Adsorption Behavior and Electron Structure Engineering of Pd-Based Catalysts for Acetylene Hydrochlorination

Catalysts ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 24 ◽  
Author(s):  
Yaqing Cen ◽  
Yuxue Yue ◽  
Saisai Wang ◽  
Jinyue Lu ◽  
Bolin Wang ◽  
...  
Keyword(s):  
Palladium Catalysts ◽  
Influence Factor ◽  
Catalytic Performance ◽  
Electron Structure ◽  
Acetylene Hydrochlorination ◽  
Practical Applications ◽  
Highly Active ◽  
New Strategy ◽  
Function Relationship ◽  
The Stability

Adsorption and activation for substrates and the stability of Pd species in Pd-based catalysts are imperative for their wider adoption in industrial and practical applications. However, the influence factor of these aspects has remained unclear. This indicates a need to understand the various perceptions of the structure–function relationship that exists between microstructure and catalytic performance. Herein, we revisit the catalytic performance of supported-ionic-liquid-phase stabilized Pd-based catalysts with nitrogen-containing ligands as a promoter for acetylene hydrochlorination, and try to figure out their regulation. We found that the absolute value of the differential energy, |Eads(C2H2)-Eads(HCl)|, is negative correlated with the stability of palladium catalysts. These findings imply that the optimization of the electron structure provides a new strategy for designing highly active yet durable Pd-based catalysts.

Carbon Dioxide Reforming of Methane over Ni/Mo/La2O3-SBA-15 Сatalyst

2012 ◽  
Vol 455-456 ◽  
pp. 960-965
Author(s):  
Jian Huang ◽  
T. Huang ◽  
A. Rongzhang ◽  
Wei Huang ◽  
Ren Xiong Ma
Keyword(s):  
Carbon Dioxide ◽  
Strong Interaction ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Stability Test ◽  
X Ray Diffraction ◽  
Carbon Dioxide Reforming ◽  
X Ray ◽  
Long Term Stability

Carbon dioxide reforming of methane over Ni/Mo/ La2O3-SBA-15 was studied. The catalyst was characterized by N2 adsorption, X-ray diffraction, H2-TPR,CO2-TPD and TG-GTA analysis. The results indicated that the introduction of an appropriate amount of La2O3 exhibited a higher activity and stability. In the long term stability test, La2O3 impregnated Ni/Mo-SBA-15 gave the highest conversion and stable activity at 800°C for 250 h. The effect of La was suggested to be due to its lower tendency to carbon deposition. Characterization results showed a strong interaction between La and Mo or Ni which facilitated the improvement of catalytic performance.

Steam treatment of a hollow lithium phosphate catalyst: enhancing carbon deposition resistance and improving the catalytic performance of propylene oxide rearrangement

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57000-57008 ◽  
Author(s):  
Yanan Wang ◽  
Zhishan Li ◽  
Weihua Ma ◽  
Grace Kinunda ◽  
Hongxia Qu ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Propylene Oxide ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Steam Treatment ◽  
Lithium Phosphate

The reaction mechanism of propylene oxide rearrangement on a hollow lithium phosphate catalyst in the presence of steam.

Influence of Supports on Catalytic Performance and Carbon Deposition of Palladium Catalyst for Methane Partial Oxidation

2007 ◽  
Vol 25 (3) ◽  
pp. 316-320 ◽  
Author(s):  
Shi Fangli ◽  
Shen Meiqing ◽  
Fei Yanan ◽  
Wang Jun ◽  
Weng Duan
Keyword(s):  
Partial Oxidation ◽  
Palladium Catalyst ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Methane Partial Oxidation

Study on the Cu-Ni/Y2O3-ZrO2 Catalytic Performance in Ethanol Steam Reforming

2012 ◽  
Vol 512-515 ◽  
pp. 2257-2261 ◽  
Author(s):  
Hong Da Wu ◽  
Ying Gui Jia ◽  
Yu Yin ◽  
Lue Zhao
Keyword(s):  
Steam Reforming ◽  
Conversion Rate ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Ethanol Conversion ◽  
Ethanol Steam Reforming ◽  
Impregnation Method ◽  
Catalyst Composition ◽  
Ethanol Steam

Y2O3-ZrO2 support was prepared by two-step precipitation method with ammonia and oxalic acid. A series of Cu-Ni/Y2O3-ZrO2 catalysts were prepared by impregnation method. The catalysts were investigated and then characterized by XRD and SEM results. The activity of catalysts in ethanol steam reforming was studied. The effects of the catalyst composition on the ethanol conversion rate were discussed and the catalysts inactivation phenomenon under the temperature ranging from 673K to 723K was then analyzed. The results show that 1Cu9Ni/1Y9Zr catalyst has higher activity in ethanol steam reforming, over which ethanol conversion rate is higher than 98% under the situation of 623K, while the inactivation of catalysts with Cu/Ni>3/7 at 673K~723K was caused by carbon deposition .

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