scholarly journals Fe-Co-K/ZrO2 Catalytic Performance of CO2 Hydrogenation to Light Olefins

2021 ◽  
pp. 44
Author(s):  
LIU Qiang ◽  
DING Jie ◽  
JI Guojing ◽  
HU Juanmin ◽  
GU Hao ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Co2 Hydrogenation ◽  
Light Olefins

Structural/Texture Evolution During Facile Substitution of Ni into ZSM-5 Nanostructure vs. its Impregnation Dispersion Used in Selective Transformation of Methanol to Ethylene and Propylene

2020 ◽  
Vol 23 ◽  
Author(s):  
Parisa Sadeghpour ◽  
Mohammad Haghighi ◽  
Mehrdad Esmaeili
Keyword(s):  
High Temperature ◽  
Physicochemical Properties ◽  
Active Sites ◽  
Catalytic Performance ◽  
Fixed Bed Reactor ◽  
Light Olefins ◽  
Isomorphous Substitution ◽  
Impregnation Method ◽  
Hydrothermal Temperature ◽  
X Ray

Aim and Objective: Effect of two different modification methods for introducing Ni into ZSM-5 framework was investigated under high temperature synthesis conditions. The nickel successfully introduced into the MFI structures at different crystallization conditions to enhance the physicochemical properties and catalytic performance. Materials and Methods: A series of impregnated Ni/ZSM-5 and isomorphous substituted NiZSM-5 nanostructure catalysts were prepared hydrothermally at different high temperatures and within short times. X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray (EDX), Brunner, Emmett and Teller-Barrett, Joyner and Halenda (BET-BJH), Fourier transform infrared (FTIR) and Temperature-programmed desorption of ammonia (TPDNH3) were applied to investigate the physicochemical properties. Results: Although all the catalysts showed pure silica MFI–type nanosheets and coffin-like morphology, using the isomorphous substitution for Ni incorporation into the ZSM-5 framework led to the formation of materials with lower crystallinity, higher pore volume and stronger acidity compared to using impregnation method. Moreover, it was found that raising the hydrothermal temperature increased the crystallinity and enhanced more uniform incorporation of Ni atoms in the crystalline structure of catalysts. TPD-NH3 analysis demonstrated that high crystallization temperature and short crystallization time of NiZSM-5(350-0.5) resulted in fewer weak acid sites and medium acid strength. The MTO catalytic performance was tested in a fixed bed reactor at 460ºC and GHSV=10500 cm3 /gcat.h. A slightly different reaction pathway was proposed for the production of light olefins over impregnated Ni/ZSM-5 catalysts based on the role of NiO species. The enhanced methanol conversion for isomorphous substituted NiZSM-5 catalysts could be related to the most accessible active sites located inside the pores. Conclusion: The impregnated Ni/ZSM-5 catalyst prepared at low hydrothermal temperature showed the best catalytic performance, while the isomorphous substituted NiZSM-5 prepared at high temperature was found to be the active molecular sieve regarding the stability performance.

scholarly journals Investigation on the promotional role of Ga2O3 on the CuO–ZnO/HZSM-5 catalyst for CO2 hydrogenation

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14426-14433
Author(s):  
Jie Du ◽  
Yajing Zhang ◽  
Kangjun Wang ◽  
Fu Ding ◽  
Songyan Jia ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Co2 Hydrogenation ◽  
Hydrogenation Of Co

The additive Ga2O3 improved the catalytic performance of CuO–ZnO/HZSM-5 catalysts for hydrogenation of CO2 to DME.

Synthesis of SAPO-34 using N-octyl-d-glucamine as additive for enhanced catalytic performance in CH3Br conversion to light olefins

2017 ◽  
Vol 441 ◽  
pp. 109-113 ◽  
Author(s):  
Jun Xie ◽  
Na Li ◽  
Peng Wang ◽  
Lang Chen ◽  
Chak-Tong Au ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Light Olefins

Optimization of synthesis condition for CO2 hydrogenation to light olefins over In2O3 admixed with SAPO-34

2019 ◽  
Vol 180 ◽  
pp. 511-523 ◽  
Author(s):  
Thanapa Numpilai ◽  
Chularat Wattanakit ◽  
Metta Chareonpanich ◽  
Jumras Limtrakul ◽  
Thongthai Witoon
Keyword(s):  
Co2 Hydrogenation ◽  
Synthesis Condition ◽  
Light Olefins

CO2 hydrogenation to light olefins with high-performance Fe0.30Co0.15Zr0.45K0.10O1.63

2019 ◽  
Vol 377 ◽  
pp. 224-232 ◽  
Author(s):  
Jie Ding ◽  
Liang Huang ◽  
Weibo Gong ◽  
Maohong Fan ◽  
Qin Zhong ◽  
...  
Keyword(s):  
High Performance ◽  
Co2 Hydrogenation ◽  
Light Olefins

Pore size effects on physicochemical properties of Fe-Co/K-Al2O3 catalysts and their catalytic activity in CO2 hydrogenation to light olefins

2019 ◽  
Vol 483 ◽  
pp. 581-592 ◽  
Author(s):  
Thanapha Numpilai ◽  
Narong Chanlek ◽  
Yingyot Poo-Arporn ◽  
Suttipong Wannapaiboon ◽  
Chin Kui Cheng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Physicochemical Properties ◽  
Pore Size ◽  
Size Effects ◽  
Co2 Hydrogenation ◽  
Light Olefins

Effect of preparation methods on the structure and catalytic performance of Fe–Zn/K catalysts for CO 2 hydrogenation to light olefins

2018 ◽  
Vol 26 (4) ◽  
pp. 761-767 ◽  
Author(s):  
Xu Wang ◽  
Jianli Zhang ◽  
Jingyu Chen ◽  
Qingxiang Ma ◽  
Subing Fan ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Light Olefins ◽  
Preparation Methods

Catalytic performance of chloromethane transformation for light olefins production over SAPO-34 with different Si content

2007 ◽  
Vol 114 (1-2) ◽  
pp. 30-35 ◽  
Author(s):  
Yingxu Wei ◽  
Dazhi Zhang ◽  
Yanli He ◽  
Lei Xu ◽  
Yue Yang ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Light Olefins ◽  
Si Content

Fischer–Tropsch synthesis over the Fe–Mn/Al2O3 catalyst: modeling and optimization of light olefins using the RSM method

2020 ◽  
Vol 44 (42) ◽  
pp. 18457-18468
Author(s):  
Maryam Arsalanfar
Keyword(s):  
Chemical Properties ◽  
Catalytic Performance ◽  
Tropsch Synthesis ◽  
Light Olefins ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Modeling And Optimization ◽  
Physico Chemical ◽  
Al2o3 Catalyst

The effect of various preparation parameters on the catalytic performance and physico-chemical properties of a supported Fe–Mn catalyst was investigated using the RSM method.

scholarly journals Understanding Hydrodechlorination of Chloromethanes. Past and Future of the Technology

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1462
Author(s):  
Sichen Liu ◽  
Javier A. Otero ◽  
Maria Martin-Martinez ◽  
Daniel Rodriguez-Franco ◽  
Juan J. Rodriguez ◽  
...  
Keyword(s):  
Catalyst Deactivation ◽  
Global Analysis ◽  
Catalytic Performance ◽  
Operating Conditions ◽  
Light Olefins ◽  
Synthesis Methods ◽  
Chlorinated Pollutants ◽  
New Perspective ◽  
Kinetics Of ◽  
Experimental And Theoretical Studies

Chloromethanes are a group of volatile organic compounds that are harmful to the environment and human health. Abundant studies have verified that hydrodechlorination might be an effective treatment to remove these chlorinated pollutants. The most outstanding advantages of this technique are the moderate operating conditions used and the possibility of obtaining less hazardous valuable products. This review presents a global analysis of experimental and theoretical studies regarding the hydrodechlorination of chloromethanes. The catalysts used and their synthesis methods are summarized. Their physicochemical properties are analyzed in order to deeply understand their influence on the catalytic performance. Moreover, the main causes of the catalyst deactivation are explained, and prevention and regeneration methods are suggested. The reaction systems used and the effect of the operating conditions on the catalytic activity are also analyzed. Besides, the mechanisms and kinetics of the process at the atomic level are reviewed. Finally, a new perspective for the upgrading of chloromethanes, via hydrodechlorination, to valuable hydrocarbons for industry, such as light olefins, is discussed.

Sign in / Sign up

Export Citation Format

Share Document