Search results

Some others think the structure of coal is pressed and out of shape, which leads to the changes of aperture structure.
They occupy more aperture room and make the millipore structure, specific surface area and adsorption volume increased.
The New Concept of Coal Structure and the Recognition of Mechanism in Coal-formed Oil[J].
Evidence for the Associated Structure of Bituminous Coal [J].
Chemistry, 2000,63(9):8-13

But they have same structure, belong to tetragonal system.
Fig. 2 shows the band structures of pure anatase TiO2 and Pr-doped anatase TiO2.
Yan, Preparation of TiO2/activated carbon with Fe ions doping photocatalyst and its application to photocatalytic degradation of reactive brilliant red K2G, Science in China Series B: Chemistry 52 (2009) 1113-1119
Roles of Geometric and Electronic Structure, J.
Liu, Correlation of electronic structures and crystal structures with photocatalytic properties of undoped, N-doped and I-doped TiO2, Chem.

A needle shape crystal with mainly microporous structure is the feature of synthesized SUZ-4 zeolite.
Its structure framework consists of five-, six-, eight-, and ten- membered rings.
The phase structure of RHA is found to be amorphous phase as shown in XRD pattern of Fig. 1.
The SUZ-4 zeolite with needle shape crystals and mainly micropore size structure are achieved in this work.
S., Cai, T., and Park, S.E., Zeolite SUZ-4 as selective dehydration catalyst for methanol conversion to dimethyl ether, Chemistry letters. 33 (2004) 1048-1049

Thermal analysis is worldwide used in foundry for control of structure and properties of cast irons.
The chemistry of the base iron and the treatment alloys are very important in controlling the structure formation at lower eutectic undercooling conditions.
The control of casting structure formation is still one of major research activity and a subject of scientific literature.
For the assessment of the correctness of the results obtained by thermal analysis other sets of analysis by other control methods that includes chilling tendency, evaluation of graphite structures and Brinell hardness tests were performed.
The thermal analysis methodology has a good efficiency compared with other types of analysis (HB tests, structure analysis and chill tendency).

Resent advances in phosphorus removal from waste water Qiwei Liu School of Municipal and Environmental Engineering, Jilin Jianzhu University, Changchun, China liuqw663784@126.com Keywords: phosphorus recovery; chemistry precipitation method; calcium phosphate(HAP); struvite (magnesium ammonium phosphate，MAP) Abstract.
Struvite is a white crystalline substance, is the diamond crystal structure, chemical composition is MgNH4PO4.6H2O, the English abbreviation for the MAP and the P2O5 content is about 58% is a high taste of phosphate rock, sustained release but also an excellent fertilizer, nature reserves rarely.

On the other hand, development of pore structure is also closely related to the cement hydration degree [16].
Therefore, characterization of the pore structure may bring additional information on hydration degree, microstructure of hardened cement pastes.
Garrault-Gauffinet, et al, Proceedings of the 11th International Congress on the Chemistry of Cement, Durban, South Africa (2013)
Fen-Chong, et al, Pore structure characterization of cement pastes blended with high-volume fly-ash, Cem.
[17] Radim Vočka, Christophe Gallé, Marc Dubois, et al, Mercury intrusion porosimetry and hierarchical structure of cement pastes: Theory and experiment, Cem.

The EMM is one of the important technologies of micro structure machining, especially for micro 3D structure machining [2, 3].
The high efficiency has been shown in micro structure machining fully.
Technologic Characteristic of EMM When the micro structure was fabricated, in order to overcoming the disadvantage of compensating electrode in EDM, the experimental research of micro structure was developed by EMM.
When pulses voltage is used in EMM, the gap depolarization and dispelling heat could be realized during pulse off time, and some machining conditions, such as chemistry speciality, flow field, electric field, could be resumed to the original state.
Therefore, EMM with ultrashort voltage pulses provides an alternative for micro structure.

The N2 adsorption desorption and NH3 temperature-programmed-desorption (NH3-TPD) were used to investigate the pore structure and acidic properties of the catalysts.
The effects of pore structure and acidic properties of catalysts on the catalytic cracking performance of Venezuelan heavy oil were carried out using an advanced cracking evaluation unit.
It was reported that in FCC catalysts, most of the active sites are located within the zeolite pore structure.
As a result only certain hydrocarbon species with a molecular size smaller than a given dimension can penetrate the zeolite pore structure [11].
Feng: Journal of Fuel Chemistry and Technology Vol. 33 (2005), p. 440 [14] X.N.

The XRF and XRD analysis confirmed that the prepared powder yields 99.68% nano-silica in an amorphous structure.
A high degree of agglomeration could be observed, leading to a highly porous structure.
This porous structure is beneficial as it would serve as an active site for any possible reaction.
Phase structure analysis of nano-silica by XRD.
Carbon Dioxide Chemistry, Capture and Oil Recovery, IntechOpen. (2018) pp. 165-183

The hardening body of SF/CP composites was obtained which was used for the structure and properties testing.
Measurement of structure.
Effect of L/P ratio on the structure of SF/CP composites.
The changing of L/P ratio had no significant effect on the structure of the composites.
Materials Chemistry and Physics Vol.120 (2010), p. 282 [8] T.