Effect of Surface Treatment Technique on Properties and Performance of Na 2 WO 4 ‐TiO 2 ‐MnO x / SiO 2 for Oxidative Coupling of Methane

2021 ◽  
Author(s):  
Yuttana Chuntalap ◽  
Noppadol Panchan ◽  
Jaroon Junsomboon ◽  
Siwapon Srisonphan ◽  
Thongthai Witoon ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
Treatment Technique ◽  
And Performance ◽  
Effect Of Surface

Influences of micro-blasting as surface treatment technique on properties and performance of AlTiN coated tools

2017 ◽  
Vol 29 ◽  
pp. 407-418 ◽  
Author(s):  
A. Jacob ◽  
S. Gangopadhyay ◽  
A. Satapathy ◽  
S. Mantry ◽  
B.B. Jha
Keyword(s):  
Surface Treatment ◽  
Treatment Technique ◽  
Coated Tools ◽  
And Performance

Particle/Cordierite Monolithic Catalysts Dual-bed Reactor with Beds-interspace Supplementary Oxygen and Performance for Oxidative Coupling of Methane

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Shengfu Ji ◽  
Wenhua Wang
Keyword(s):  
Oxidative Coupling ◽  
Chemical Reactor ◽  
Catalytic Performance ◽  
Oxidative Coupling Of Methane ◽  
Supplementary Oxygen ◽  
Sio2 Particle ◽  
Monolithic Catalysts ◽  
And Performance ◽  
Dual Bed

Abstract A novel dual-bed reactor comprising of the upper-layer Na2WO4-Mn/SiO2 particle catalysts and the under-layer Na3PO4-Mn/SiO2/cordierite monolithic catalysts with beds-interspace supplementary oxygen was constructed for oxidative coupling of methane (OCM). The catalytic performance of OCM in the dual-bed reactor was remarkably improved compared with that in the previously reported chemical reactor for OCM.

scholarly journals Study of the Effect of Surface Treatment on the Chloride Ion Transport at the Cementitious Spacer–Concrete Interface

2020 ◽  
Vol 10 (15) ◽  
pp. 5196
Author(s):  
Yibo Yang ◽  
Chen Huang ◽  
Wenying Guo ◽  
Hui Zhao ◽  
Zhenjie Li ◽  
...  
Keyword(s):  
Ion Transport ◽  
Surface Treatment ◽  
High Performance Concrete ◽  
Chloride Ion ◽  
Hardened Concrete ◽  
Treatment Technique ◽  
Chloride Resistance ◽  
Chloride Ion Transport ◽  
Concrete Interface ◽  
Effect Of Surface

Spacers are important components in reinforced concrete structures to provide cover between the steel reinforcement and the formwork. Cementitious spacers are of particular interest for coastal engineering structures, as they are compatible with cement-based chloride-resistant high-performance concrete compared to plastic and steel spacers. However, the cementitious spacer–concrete interface was found to be highly porous and microcracked. This study investigated the effect of surface treatment on the chloride ion transport at the cementitious spacer–concrete interface. A surface treatment technique for potential mass production was introduced and the state-of-practice tests of the hardened concrete were modified to evaluate the performance of the spacer–concrete composite specimens. The results showed that the surface treatment on a cementitious spacer improved the bonding between the spacer and concrete at the interface. The surface treatment of the spacer improved the compressive strength and the chloride resistance of the composite specimen locally compared to those without surface treatment. The advantage of surface treatment on the chloride resistance was partially represented in either the diffusion coefficient or the column electric flux. The maximum chloride ion penetration depth at the spacer–concrete interface was recommended as an additional proxy for the evaluation of the chloride resistance performance of composite specimens.

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