In-situ synthesis and properties of porous cordierite ceramics with adjustable pore structure

2020 ◽  
Vol 46 (10) ◽  
pp. 14808-14815 ◽  
Author(s):  
Hao Li ◽  
Cuiwei Li ◽  
Linghao Wu ◽  
Han Wang ◽  
Junwen Li ◽  
...  
Keyword(s):  
Pore Structure ◽  
In Situ Synthesis ◽  
Cordierite Ceramics ◽  
Porous Cordierite

scholarly journals In Situ DRIFTS Investigation on CeOx Catalyst Supported by Fly-Ash-Made Porous Cordierite Ceramics for Low-Temperature NH3-SCR of NOX

Catalysts ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 496 ◽  
Author(s):  
Shaoxin Wang ◽  
Ziwei Chen ◽  
Beini He ◽  
Zheng Yan ◽  
Hao Wang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Temperature ◽  
Photoelectron Spectroscopy ◽  
Active Sites ◽  
Supported Catalyst ◽  
Nh3 Scr ◽  
Scr Catalysts ◽  
Cordierite Ceramics ◽  
Porous Cordierite

A series of CeOx catalysts supported by commercial porous cordierite ceramics (CPCC) and synthesized porous cordierite ceramics (SPCC) from fly ash were prepared for selective catalytic reduction of NOx with ammonia (NH3-SCR). A greater than 90% NOx conversion rate was achieved by the SPCC supported catalyst at 250–300 °C when the concentration of loading precursor was 0.6 mol/L (denoted as 0.6Ce/SPCC), which is more advantageous than the CPCC supported ones. The EDS mapping results reveal the existence of evenly distributed impurities on the surface of SPCC, which hence might be able to provide more attachment sites for CeOx particles. Further measurements with temperature programmed reduction by hydrogen (H2-TPR) demonstrate more reducible species on the surface of 0.6Ce/SPCC, thus giving rise to better NH3-SCR performance at a low-temperature range. The X-ray photoelectron spectroscopy (XPS) analyses reveal that the Ce atom ratio is higher in 0.6Ce/SPCC, indicating that a higher concentration of catalytic active sites could be found on the surface of 0.6Ce/SPCC. The in situ diffused reflectance infrared fourier transform spectroscopy (DRIFTS) results indicate that the SCR reactions over 0.6Ce/SPCC follow both Eley-Rideal (E-R) and Langmuir-Hinshelwood (L-H) mechanisms. Hence, the SPCC might be a promising candidate to provide support for NH3-SCR catalysts, which also provide a valuable approach to recycling the fly ash.

Preparation and Characterization of Porous Cordierite for Catalyst Support Application

2016 ◽  
Vol 840 ◽  
pp. 71-76
Author(s):  
Eing Kuan Kok ◽  
Johar Banjuraizah ◽  
Shing Fhan Khor ◽  
Zainal Arifin Ahmad
Keyword(s):  
Phase Transformation ◽  
Pore Structure ◽  
Catalyst Support ◽  
Linear Shrinkage ◽  
Shrinkage Porosity ◽  
Ceramic Suspension ◽  
Cordierite Ceramics ◽  
Porous Cordierite

This paper aims at studying the porous cordierite ceramics prepared by using the non-stochiometric cordierite composition formulation (2.8MgO.1.5Al2O3.5SiO2) by PU sponge impregnated method. The ceramic suspension were prepared with non-stoichiometric formulation of cordierite and sintered at 1250 °C, 1275 °C, 1285 °C, 1300 °C and 1325 °C. The phase transformation of non-stochiometric formulation cordierite was investigated by XRD. This paper also aims to compare the effect of linear shrinkage, porosity and density of 20 wt.% PEG treated PU sponge with untreated PU sponge respectively corresponding to different pore content (100 ppi, 80 ppi, 60 ppi, and 40 ppi). The pore structure was analyzed by SEM.

Hydrothermal In Situ Synthesis ZnO Nanoarrays and Their Photocatalytic Applications

2013 ◽  
Vol 30 (6) ◽  
pp. 667
Author(s):  
Zhenzhen WANG ◽  
Fangfang LI ◽  
Han GUO ◽  
Jiuju FENG ◽  
Aijun WANG
Keyword(s):  
In Situ Synthesis ◽  
Photocatalytic Applications

In situ synthesis of SiC nanowire porous layer on carbon/carbon composites

2017 ◽  
Vol 101 (3) ◽  
pp. 1371-1380 ◽  
Author(s):  
Tao Li ◽  
Yulei Zhang ◽  
Jia Sun ◽  
Jincui Ren ◽  
Pengfei Zhang ◽  
...  
Keyword(s):  
Porous Layer ◽  
In Situ Synthesis ◽  
Carbon Composites

In situ synthesis of Mn3O4/graphene nanocomposite and its application as a lubrication additive at high temperatures

2021 ◽  
Vol 546 ◽  
pp. 149019
Author(s):  
Bao Jin ◽  
Jun Zhao ◽  
Guangyan Chen ◽  
Yongyong He ◽  
Yiyao Huang ◽  
...  
Keyword(s):  
High Temperatures ◽  
In Situ Synthesis ◽  
Graphene Nanocomposite ◽  
Lubrication Additive

scholarly journals Improved biorefinery pathways of marine diatoms using a water miscible ionic liquid and its colloidal solution: efficient lipid extraction and in situ synthesis of fluorescent carbon dots for bio-imaging applications

RSC Advances ◽  
2021 ◽  
Vol 11 (35) ◽  
pp. 21207-21215
Author(s):  
Paidi Murali Krishna ◽  
Veerababu Polisetti ◽  
Krishnaiah Damarla ◽  
Subir Kumar Mandal ◽  
Arvind Kumar
Keyword(s):  
Ionic Liquid ◽  
Colloidal Solution ◽  
Polar Solvent ◽  
Lipid Extraction ◽  
In Situ Synthesis ◽  
Marine Diatoms ◽  
Bio Imaging ◽  
Partition Method ◽  
Fluorescent Carbon Dots

In this study, a water-miscible ionic liquid (IL), 1-ethyl-3-methylimidazoliumacetate ([EMIM][Ac]), has been used for lipid extraction from marine diatoms Thalassiosira lundiana CSIR-CSMCRI 001 by following a non-polar solvent partition method.

scholarly journals In-situ synthesis of novel Co2FeO4 needle-like phases for structural and functional integration

2021 ◽  
Author(s):  
Qianqian Chen ◽  
Panpan Lin ◽  
Xuanyu Du ◽  
Jincheng Lin ◽  
Tiesong Lin ◽  
...  
Keyword(s):  
Functional Integration ◽  
In Situ Synthesis
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