Results 11 to 20 of about 355,757 (390)

Balancing elementary steps enables coke-free dry reforming of methane

Nature Communications, 2023
Balancing kinetics, a crucial priority in catalysis, is frequently achieved by sacrificing activity of elementary steps to suppress side reactions and enhance catalyst stability.
Jiaqi Yu, Tien Le, Dapeng Jing, Eli Stavitski, Nicholas T. Hunter, Kanika Lalit, Denis Leshchev, D. Resasco, E. Sargent, Bin Wang, Wenyu Huang   +10 more
semanticscholar   +1 more source

Raman Spectroscopy Characterization of Amorphous Coke Generated in Industrial Processes

ACS Omega, 2022
Examples on the real-world field application of Raman spectroscopy with systematic analysis of the intensity variation of D and G bands corresponding to the change of excitation laser energy to characterize and compare coke species from various ...
C. Zhang, Sage F. Hartlaub, I. Petrović, Bilge Yilmaz   +3 more
semanticscholar   +1 more source

Unveiling the Deactivation by Coke of Nial2o4 Spinel Derived Catalysts in the Bio-Oil Steam Reforming: Role of Individual Oxygenates

Social Science Research Network, 2022
The catalyst stability, mainly affected by coke deposition, remains being a challenge for the development of a sustainable process for hydrogen production by steam reforming (SR) of bio-oil.
Leire Landa, A. Remiro, José Valecillos, Beatriz Valle, J. Bilbao, A. Gayubo   +5 more
semanticscholar   +1 more source

Directed transforming of coke to active intermediates in methanol-to-olefins catalyst to boost light olefins selectivity

Nature Communications, 2021
Methanol-to-olefins (MTO), the most important catalytic process producing ethylene and propylene from non-oil feedstocks (coal, natural gas, biomass, CO 2 , etc.), is hindered by rapid catalyst deactivation due to coke deposition.
Jibin Zhou, Mingbin Gao, Jinling Zhang, Wenjuan Liu, Tao Zhang, Hua Li, Zhaochao Xu, M. Ye, Zhongmin Liu   +8 more
semanticscholar   +1 more source

Investigation into the Effect of Multi-Component Coal Blends on Properties of Metallurgical Coke via Petrographic Analysis under Industrial Conditions

Sustainability, 2022
The coalification rank of the coal blend components and their caking properties initially impact the coke’s quality. In part, the quality of coke depends on the technological parameters of the coke production technology, such as the method of blend ...
L. Kieush, A. Koveria, J. Schenk, Kanay Rysbekov, V. Lozynskyi, Heng Zheng, A. Matayev   +6 more
semanticscholar   +1 more source

Electron Diffraction Enables the Mapping of Coke in ZSM‐5 Micropores Formed during Methanol‐to‐Hydrocarbons Conversion

Angewandte Chemie, 2022
Unveiling the coke formation in zeolites is an essential prerequisite for tackling the deactivation of these catalysts in the transformations of hydrocarbons.
J. Wennmacher, Soheil Mahmoudi, P. Rzepka, Sung Sik Lee, T. Gruene, V. Paunović, J. V. van Bokhoven   +6 more
semanticscholar   +1 more source

Variability in Metallurgical Coke Reactivity Index (CRI) and Coke Strength after Reaction (CSR): An Experimental Study

ACS Omega, 2022
The coke reactivity index and coke strength after reaction are critical parameters for the efficient operation of a blast furnace. Therefore, maintaining desired qualities of the produced coke as per coal blend chemistry and coke oven battery parameters ...
Deepak Kumar, V. K. Saxena, H. P. Tiwari, B. Nandi, A. Verma, V. K. Tiwary   +5 more
semanticscholar   +1 more source

Sustainable production of graphene from petroleum coke using electrochemical exfoliation

npj 2D Materials and Applications, 2021
Petroleum coke is a solid, carbonaceous by-product of oil refining and is normally used for heating or as an anode in aluminum and steel production.
S. Saha, Pritishma Lakhe, M. J. Mason, Bryan J. Coleman, K. Arole, Xiaofei Zhao, S. Yakovlev, S. Uppili, Micah J. Green, Rohan A. Hule   +9 more
semanticscholar   +1 more source

A Comprehensive Review of Characterization Methods for Metallurgical Coke Structures

Materials, 2021
The structure of coke affects its reactivity and strength, which directly influences its performance in the blast furnace. This review divides coke structures into chemical structure, physical structure, and optical texture according to their relevant ...
Heng Zheng, R. Xu, Jianliang Zhang, O. Daghagheleh, J. Schenk, Chuanhui Li, W. Wang   +6 more
semanticscholar   +1 more source

Stamp-Charged Coke-Making Technology—The Effect of Charge Density and the Addition of Semi-Soft Coals on the Structural, Textural and Quality Parameters of Coke

Energies, 2021
Coke is an integral component of the blast furnace charge; therefore, it plays an important role in the integrated steelmaking process. Achieving the required coke quality parameters by producers requires the use of a high proportion of the highest ...
M. Rejdak, A. Strugała, A. Sobolewski
semanticscholar   +1 more source