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Sornchamni4,e 1Department of Chemical Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangsue, Bangkok, 10800, THAILAND 2Research and Development Centre for Chemical Engineering Unit Operation and Catalyst Design, King Mongkut’s University of Technology North Bangkok, Bangsue, Bangkok, 10800, THAILAND 3Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bangsue, Bangkok, 10800, THAILAND 4Analytical & Petrochemical Research Department, PTT Research and Technology Institute, Wangnoi, Ayutthaya, 13170, THAILAND ap.inbamrung@gmail.com, bphn@kmutnb.ac.th, csbtt@kmutnb.ac.th, dcyn@kmutnb.ac.th, ethana.s@pttplc.com Keywords: Square Channel Reactor; Monolith Reactor; Mathematic Models; Steam Methane Reforming Abstract.
Introduction One of the most effective reactor types in chemical process industries is a structured monolithic reactor.
Monoliths or honeycomb structure consists of a large number of straight parallel channels of small diameter (0.5–6.0 mm) through which the fluid flows [2].
The monolithic catalyst is a structured substrate, which is covered with a layer (washcoated) of material that serves as a catalyst [3].

However, HCl of no doping is not only removed from the composite film difficultly but also occurs addition reaction with PANI when the HCl content is too high, which affects the PANI structure in the PANI - PVA composite film.
However, the aniline monomer will be excessive oxidation when the reaction time is too long, which will make the structure of PANI in the PANI - PVA composite film be changed.
The mixture of PANI and PVA is in state of soft rubber because its structure will be changed under too high temperature, which makes tensile strength of the PANI-PVA composite film decrease.
Zhang, University Chemistry, Chongqing University Publishers ed., Chongqing, China,2007.

The magnetic properties of nano composite material using alloy as magnetic particles have closely relationship with their structure and composition.
X-ray diffraction (D/max—RA, 12kW, Cu Kα target, λ=0.15406 nm) and vibrating specimen magnetometer are used for structure and phase analysis and magnetic research.
Coercivity is a structure sensitive quantity whose changing rule has closely relationship with interior stress, impurities, particle size and shape and preparation craft under a certain chemical composition [1,9].
It means that coercivity of ε-FexN has little to do with component when chemistry compositions distribute uniformly.

In developing control systems of materials integrity [6] the most encountered practical problems were related to the control of layers of small thickness, such as structure of airplane wings, the walls of different reservoirs, floating structure of boats, different pipes etc.
The choice of Lamb waves for the control of this type of structures is justified by numerous advantages which are offered to specific study.
Maugin (Eds.), NATO Science Series II: Mathematics, Physics and Chemistry, Springer, New York, 2005, pp. 241-256

The Corrosion Mechanism of High-strength Steel Bar The mechanism performance of steel bars is the synthetical reflection that their chemistry elements and organization structure under the effects of certain external factors, such as load property, stress state, working environment and environmental media.
（In chinese） [4] Weiliang Jing.Durability of concrete structure (Science Press,2003).
（In chinese） [5] YuZhang:Introduction To The Durability Of Concrete Structure ( Shanghai scientific & Technical Publishers 2003).

Preparation and photoelectric performance of Eu 3+-doped porous TiO2 thin film electrode Yi Zhou 1, a, Kelong Huang 2, b, Mingming Dang3,c, Hong Li3, d, Caixia Lv 3, e, Dehui Shi3, f 1,3 College of chemical and biological engineering, Changsha University of Science and Technology, Changsha, 410004, China 2 School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China a zhouyihn@163.com, bklhuang@mail.cus.edu.cn, cdangmm1985@163.com, df22450@163.com, e lvcaixiaflying@163.com, fshidehui0@163.com Key words: coating method, Eu 3+-doped, the porous TiO2 thin film, photoelectric performance Abstract.
Especially the related works have not been combined with the related research results in the phase and control of the diameter and the structure design of porous film etc.
Crystal structure of as-synthesized size TiO2 porous films were identified by X-ray diffraction (XRD, SEMENS D5000).
As shown in Fig. 3, the final TiO2-coated film electrodes with flat surfacing had a uniform porous structure, like a sponges made by connecting between the TiO2 particles, whose average grain diameter was about 25 nm.

This lattice is the well known NaCl structure.
In figure 2 (A), the two first diffraction planes are the most significant to represent the hexagonal structure of Ni(OH)2.
In the figure 2 (B), the bar chart form indicates that the structure is close to spherical, which is in agreement with the NiO cubic lattice, around 5 nm for TAMOH base and 8 nm for Ammoniac base.
WELLS "Structural inorganic chemistry" Oxford science publications, p.239 et 537, fith edition (1995)

The reason for adhesion in the honing process is the result of physical, chemistry and mechanical comprehensive functions interact between the oilstone abrasive and processed materials.
There are many factors influence the degree of wheel adhesion, such as the height of grinding temperature, the size of normal grinding force and plastic deformation shear force, the crystal structure of abrasive particles and grinded materials, the surface state of work pieces and so on[2].
In the honing process, the grinding temperature is very high, alloy elements can be oxidized in the air and generate structural stability of the rhombic hexahedron α-Cr2O3 at the temperature 300~950℃, but Al is oxidized to form γ-Al2O3 within 900~950℃ and α-Al2O3 within higher temperature, which have the same crystal structure with Cr2O3 [3].
Cr2O3，Al2O3 and Co2O3 have the same structure with α-Cr2O3, and they also have similar lattice parameters, that will make alloy elements form strong affinity adhesion with the corundum stone through the oxidation.

The corrugated-plate structure This work investigated numerical simulations of the condensation characteristics of wet steam flowing over a single channel corrugated plate, as pictured in Fig. 1.
The structure of the waveforms board The Reynolds number is used to calculate the flow pattern of the wet steam flow field over the wave plate.
The resulting grid structure is shown in Figure 2.
[8] Guangqi Liu, Malian Xiang, Jie Liu, Data Handbook of Chemistry and Chemical properties, inorganic volume.

The etching solution was a 4% volume fraction of nitric acid alcohol solution, and the metallographic structure was observed by a metallographic microscope LV150N, Japan Nikon.
The as cast magnesium alloy is an mixed eutectic structure of α-Mg phase and Mg17Al12 phase.
(d) (c) Fig. 5 Metallographic structure: (a) as cast AZ91D; (b) squeezed cast AZ91D;(c) T300Cf/AZ91D composites; (d) CNTs-T300Cf/AZ91D composites The strengthening mechanism from grafted carbon nanotubes can be explained from protecting carbon fiber from degradation.
Journal of Physical Chemistry C. 2007, 111(48): 17865-17871