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Online since: June 2013
Authors: T. Nuraiti T. Izhar, Soon An Ong, Yee Shian Wong, C.K. Kairulazam C.K. Abdullah, Nabilah A. Lutpi, W.Fadhilah W.M. Khalik
The objectives of this study are to study the porous structure and the adsorption properties of GML shells as adsorbent based activated carbon.
The effectiveness of activated carbon to adsorb the contaminant is a function of the physical properties and surface chemistry of activated carbon.
The surface structure of GML before treating with dyes is compacted and small compared to the precursor’s image.
The magnification of the image is too small and cannot detect its surface structure and pore size.
After through the adsorption processes, the image shows that its surface structure was adsorbed with the dyes.
The effectiveness of activated carbon to adsorb the contaminant is a function of the physical properties and surface chemistry of activated carbon.
The surface structure of GML before treating with dyes is compacted and small compared to the precursor’s image.
The magnification of the image is too small and cannot detect its surface structure and pore size.
After through the adsorption processes, the image shows that its surface structure was adsorbed with the dyes.
Online since: August 2017
Authors: Kyu Seog Hwang, Young Sun Jeon, Sung Dai Kim, Hwang Bo Seung
The morphology of the films was similar to amorphous glass structure with a high transmittance in visible spectral range.
The CaTiO3:Er3+ formed during annealing at 1000°C for 120 minutes in Ar has an orthorhombic structure, as shown in Fig. 2(a).
In this structure, the Ti4+ ions occupy the edges, the O2- ions are located between two adjacent Ti4+ ions, and the Ca2+ ions are located at the centers.
Yu, Interface structure and phase of epitaxial SrTiO3 (100) thin films grown directly on silicon, Appl.
Randall, Crystal and defect chemistry of rare earth cations in BaTiO3, J.
The CaTiO3:Er3+ formed during annealing at 1000°C for 120 minutes in Ar has an orthorhombic structure, as shown in Fig. 2(a).
In this structure, the Ti4+ ions occupy the edges, the O2- ions are located between two adjacent Ti4+ ions, and the Ca2+ ions are located at the centers.
Yu, Interface structure and phase of epitaxial SrTiO3 (100) thin films grown directly on silicon, Appl.
Randall, Crystal and defect chemistry of rare earth cations in BaTiO3, J.
Online since: September 2013
Authors: Liang Bin Hu, Jia Zhu Zou, Feng Wei Yuan
Other structures needed some changes.
Thus, the water cooling system needed completely change, around the furnace water wall was diaphragm wall structure, rearrange water-cooling lower header in front, back, left and right side, furnace water wall was densely covered pin, which was covered with refractory concrete surface to prevent water wall absorbing too much too much heat and assure the stability of combustion.
Other structures and components didn’t need to change.
Safety accessories of boiler adopt the original structure to change, soot blower system, there were eight holes from exit of the furnace to air preheater of soot blower system.
Yan: Computers and Applied Chemistry, Vol.29 (2012), No.10, p1163.
Thus, the water cooling system needed completely change, around the furnace water wall was diaphragm wall structure, rearrange water-cooling lower header in front, back, left and right side, furnace water wall was densely covered pin, which was covered with refractory concrete surface to prevent water wall absorbing too much too much heat and assure the stability of combustion.
Other structures and components didn’t need to change.
Safety accessories of boiler adopt the original structure to change, soot blower system, there were eight holes from exit of the furnace to air preheater of soot blower system.
Yan: Computers and Applied Chemistry, Vol.29 (2012), No.10, p1163.
Online since: January 2019
Authors: Gang Chen, Seng Peng, Xiao Bin Tang, Hao Wang, Yan Wei
., Nanyang, China
2Changqing Drilling Company of CCDC, Xi'an, China
3College of Chemistry and Chemical Engineering, Shaanxi Province Key Laboratory of Environmental Pollution Control and Reservoir Protection Technology of Oilfields, Xi’an Shiyou University, Xi’an, China
4State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing, China
*Corresponding author, email: pengsen911@126.com; gangchen@xsyu.edu.cn
Keywords: Vegetable oil, Poly-hydrazide, Pour point depressor, Waxy crude oil.
The waxes generally crystallize as an interlocking network of fine sheets, thereby entrapping the remaining fuel in cage-like structures.
Generally, this problem occurs at lower temperatures owing to three-dimensional network structure shaped by the formation of needle like or flaky crystals and their junction or by the accumulation of dense ring and hydrogen bonds of polar groups of gum.
Table 3 Effect of PH3O on the pour point of crude oil PH Δ pour point (℃) 1# 2# 3# 4# PH3O-1 3.2 3.9 3.9 2.9 PH3O-2 4.1 5.6 7.9 3.8 PH3O-3 5.5 7.8 3.4 3.1 PH3O-4 3.5 5.2 3.6 2.6 Generally, a cold flow improver contains an oil-soluble long-chain alkyl group and a polar structure moiety in the molecular structure.
[5] Song Y.P., Ren T.H., Fu X.S., Xu X.H., Study on the relationship between the structure and activities of alkyl methacrylate-maleic anhydride polymers as cold flow improvers in diesel fuels.
The waxes generally crystallize as an interlocking network of fine sheets, thereby entrapping the remaining fuel in cage-like structures.
Generally, this problem occurs at lower temperatures owing to three-dimensional network structure shaped by the formation of needle like or flaky crystals and their junction or by the accumulation of dense ring and hydrogen bonds of polar groups of gum.
Table 3 Effect of PH3O on the pour point of crude oil PH Δ pour point (℃) 1# 2# 3# 4# PH3O-1 3.2 3.9 3.9 2.9 PH3O-2 4.1 5.6 7.9 3.8 PH3O-3 5.5 7.8 3.4 3.1 PH3O-4 3.5 5.2 3.6 2.6 Generally, a cold flow improver contains an oil-soluble long-chain alkyl group and a polar structure moiety in the molecular structure.
[5] Song Y.P., Ren T.H., Fu X.S., Xu X.H., Study on the relationship between the structure and activities of alkyl methacrylate-maleic anhydride polymers as cold flow improvers in diesel fuels.
Online since: September 2019
Authors: Julija S. Karzina, Maiwand Hootak, Maxim Yu. Zamozdra
Introduction
At the moment, engineering technologies are rapidly developing and require the consciousness of new structural materials, providing at the same time sufficient strength, and at the same time the ease of the created integral structures [1].
It has a very low density: about 0.07 g/cm3 – 0.7 g/cm3 (most aluminum foams have a porosity of more than 70%), which makes it indispensable for use in the manufacture of lightweight structures.
Even a slight increase in the strength of the foam will increase the integral strength characteristics of the structure in which they are used.
Using the software package for VideoTesT Structure 5.2, a quantitative analysis of pores was made (see figure 2).
[3] Mercky, A.P., Taube, P., “Unstable Miracle”, Moscow: Chemistry, 1983, 224 p
It has a very low density: about 0.07 g/cm3 – 0.7 g/cm3 (most aluminum foams have a porosity of more than 70%), which makes it indispensable for use in the manufacture of lightweight structures.
Even a slight increase in the strength of the foam will increase the integral strength characteristics of the structure in which they are used.
Using the software package for VideoTesT Structure 5.2, a quantitative analysis of pores was made (see figure 2).
[3] Mercky, A.P., Taube, P., “Unstable Miracle”, Moscow: Chemistry, 1983, 224 p
Online since: July 2015
Authors: Xiao Xue Song, Shiai Xu
However, the inherent brittleness of epoxy resins resulted from their highly crosslinked network structure limits their potential applications in many fields.
This is due to the decreased mobility of pre-crosslinked CTBN as a result of higher molecular weight and interpenetrating structure.
There are much smaller phase separated rubber particles in the pre-crosslinked CTBN/epoxy as the decreased mobility of CTBN caused by the higher molecular weight and the interpenetrating structure restricts its phase separation process.
Tanaka, Epoxy Resins: Chemistry and Technology, 1st ed., Marcel Dekker Inc., New York, 1973
Liang, Properties and behavior of CTBN-modified epoxy with IPN structure, J.
This is due to the decreased mobility of pre-crosslinked CTBN as a result of higher molecular weight and interpenetrating structure.
There are much smaller phase separated rubber particles in the pre-crosslinked CTBN/epoxy as the decreased mobility of CTBN caused by the higher molecular weight and the interpenetrating structure restricts its phase separation process.
Tanaka, Epoxy Resins: Chemistry and Technology, 1st ed., Marcel Dekker Inc., New York, 1973
Liang, Properties and behavior of CTBN-modified epoxy with IPN structure, J.
Online since: January 2011
Authors: Jia Xin Li, Hong Ming Long, Guang Wu Tang
Dioxin’s molecular structure is shown in Fig.1, every benzene can replace 1 to 4 chlorine atoms, among these, PCDDs have 75 isomers, PCDFs have 135 isomers.
More and more research showed that, the long-term endanger on human beings cased by dioxin is more serious than the situation we hold present, so we must think highly of its pollution prevention[2]. 2 3 8 900 7 5 4 PCDD 6 O O 1 8 900 7 6 1 2 3 5 4 O PCDF Fig.1 The molecular structure of dioxin Iron ore sintering process is the second toxic pollutant emission sources only inferior to the municipal solid waste incinerator[3,4].
Precursors of low-temperature catalytic reaction can be precursors like chlorophenol and chlorobenzene whose chemistry structure are similar to dioxin, as well as none chlorinated organic with different molecular structure, like aliphatic compounds, aromatic compounds, acetylene and propylene and so on. precursors represented by chlorobenzene and chlorophenol.
Dioxin can be generated by the reaction between different chemical structure compounds like PVC or no chlorine organism like polystyrene, cellulose, lignin, coal and carbon particles with chlorine source.
More and more research showed that, the long-term endanger on human beings cased by dioxin is more serious than the situation we hold present, so we must think highly of its pollution prevention[2]. 2 3 8 900 7 5 4 PCDD 6 O O 1 8 900 7 6 1 2 3 5 4 O PCDF Fig.1 The molecular structure of dioxin Iron ore sintering process is the second toxic pollutant emission sources only inferior to the municipal solid waste incinerator[3,4].
Precursors of low-temperature catalytic reaction can be precursors like chlorophenol and chlorobenzene whose chemistry structure are similar to dioxin, as well as none chlorinated organic with different molecular structure, like aliphatic compounds, aromatic compounds, acetylene and propylene and so on. precursors represented by chlorobenzene and chlorophenol.
Dioxin can be generated by the reaction between different chemical structure compounds like PVC or no chlorine organism like polystyrene, cellulose, lignin, coal and carbon particles with chlorine source.
Online since: June 2010
Authors: Li Li Bai, Er Jun Bu, Mi Zhou, He Yang, Xiang Xin Xue
Table 1 Chemical composition of TBBFS (wt %)
Composition CaO SiO2 TiO2 Al2O3 MgO CO2 SO3 Fe2O3
content 27.8 25.1 16.9 13.2 7.38 5.48 1.07 0.975
10 20 30 40 50 60 70
▲
●
●
2θ,ο
▲
▲
●
▲
▲
▲ ▲ ▲
◆
◆
◆
◆◆
◆
◆
cps
●
◆CaTiO3 ●Ca2Mg(Si2O7) ▲CaMg(SiO3)2
Fig 1 XRD patterns of Panzhihua slag
powder at room temperature
Fig.2 Structure model of
methylene blue (MB)
Chemical reagents: Fe (NO3) 3 (AR), ZrO2 (AR), Methylene blue (Shenyang Reagent Factory),
methylene blue formula C16H18ClN3S • 3H2O, molecular structure shown in Figure 2.
The study [7] view: The system can join a new phase ZrTiO4, while the ZrTiO4 is a limited solid solution, its structure is quite different from TiO2, ZrO2, the formation of new phase needs a special relative transformation process, therefore, under the 600 °C the new phase is in the nuclear and chemical ZrTiO4 period, and it can not form a complete grain.
Rear earth and transition-metal co-doped TiO2 nanoparticles: structure and photocatalytic properties :Chemical New Materials, (2010), p.79-82 [6] Lv Xue-jun, Xu Yi-ming, Wang Zhi, et al.
Fe (Ⅲ) involved in TiO2 photocatalytic degradation of X3B Study of Reaction Mechanism: Chemistry college journal, (2004),p.67 [7] Liu Su-wen, et al.
The Luminescent Properties and Nano-structure of ZrO2-TiO2 Composite Powders: Ceramic Bulletin, (2004), p.67-68 [8]Chen Shan-shan, Li Huai-xiang, Qu Pi-cheng.
The study [7] view: The system can join a new phase ZrTiO4, while the ZrTiO4 is a limited solid solution, its structure is quite different from TiO2, ZrO2, the formation of new phase needs a special relative transformation process, therefore, under the 600 °C the new phase is in the nuclear and chemical ZrTiO4 period, and it can not form a complete grain.
Rear earth and transition-metal co-doped TiO2 nanoparticles: structure and photocatalytic properties :Chemical New Materials, (2010), p.79-82 [6] Lv Xue-jun, Xu Yi-ming, Wang Zhi, et al.
Fe (Ⅲ) involved in TiO2 photocatalytic degradation of X3B Study of Reaction Mechanism: Chemistry college journal, (2004),p.67 [7] Liu Su-wen, et al.
The Luminescent Properties and Nano-structure of ZrO2-TiO2 Composite Powders: Ceramic Bulletin, (2004), p.67-68 [8]Chen Shan-shan, Li Huai-xiang, Qu Pi-cheng.
Online since: October 2011
Authors: Li Hua Gan, Xiao Gang Wang, Ming Xian Liu, Long Wu Chen, Yang Li, Zi Jie Xu, Liang Yang
Double Templating Synthesis and Electrochemical
Properties of Carbon Foams
Yang Li, Mingxian Liu, Lihua Gan*, Liang Yang, Zijie Xu, Xiaogang Wang, Longwu Chen
Department of Chemistry, Tongji University, Shanghai 200092, P.
Recently, the synthesis of porous carbon materials by templating method has been largely investigated because of uniform pore size and controllable pore structure [4,5,6,7].
The porous carbon materials with different pore sizes and structures have been fabricated by hard templating method and the common templates are zeolites, ludox, nanosilica and so on [8,9,10].
On the other hand, aroused by the universal existence of hierarchical pore structures in nature, there was increasingly interest in hierarchically porous materials as they combine the advantages of each pore size regime [13].
The hierarchical pore structure decreases the diffusion resistance of electrolytes and promotes the ion transfer within the pore channel, and thus improves the electrochemical properties of carbon foams.
Recently, the synthesis of porous carbon materials by templating method has been largely investigated because of uniform pore size and controllable pore structure [4,5,6,7].
The porous carbon materials with different pore sizes and structures have been fabricated by hard templating method and the common templates are zeolites, ludox, nanosilica and so on [8,9,10].
On the other hand, aroused by the universal existence of hierarchical pore structures in nature, there was increasingly interest in hierarchically porous materials as they combine the advantages of each pore size regime [13].
The hierarchical pore structure decreases the diffusion resistance of electrolytes and promotes the ion transfer within the pore channel, and thus improves the electrochemical properties of carbon foams.
Online since: July 2013
Authors: Jian Wei Xing, Hui Xu
Results and discussions
Characterization of ZnO nanoparticles and PANI/ZnO nanocomposite
Fig.1 XRD patterns of ZnO nanoparticles(a), polyaniline(PANI)(b),and PANI/ZnO nanocomposite(c)
The XRD patterns of ZnO nanoparticles (Fig.1a) show characteristic peaks (at 2θ=31.7º, 34.4º, 36.3º, 47.5º, 56.6º, 62.9º, 67.9º, 69.1º, 72.6º) of ZnO with the crystalline structure of hexagonal wurtzite(JCPDS No.36-1451).
The pristine PANI (Fig. 1b) has a weak broad peak between 15º~25º, because of its amorphous structure with low crystallinity.
Obviously, ZnO nanoparticles (Fig. 3a) had strong absorption peaks in the UV region at 342 nm and 375 nm, which is the characteristic band of ZnO nanomaterials, i.e., typical wurtzite hexagonal structure.
The SEM image of ZnO nanoparticles (Fig. 4(a)) indicates that the product mainly consists of solid rod-like structures and has a crystalline structure.
Ashok Kumar, Hui-Wen Cheng, Shen-Ming Chen*, Reactive & Functional Polymers 69 (2009) 364-370 [10] Jungang Hou*, Rui Cao, Zheng Wang, Shuqiang Jiao*, Hongmin Zhu, Journal of Hazardous Materials 217-218(2012) 177-186 [11] Jing Huang1, Taili Yang2, Yanfei Kang2, Yang Wang2, Shurong Wang2*, Journal of Natural Gas Chemistry 20(2011) 515-919 [12] Volkan Eskizeybeka, Fahriye Sarib, Handan Gülce b,*, Ahmet Gülceb, Ahmet AvcIa, Applied Catalysis B: Environmental 119-120(2012) 197-206 [13] Ali OladRahimeh Nosrati, Res Chem Intermed, DOI 10. 1007/s11164-011-0349-0 [14] Sadia AmeenM.
The pristine PANI (Fig. 1b) has a weak broad peak between 15º~25º, because of its amorphous structure with low crystallinity.
Obviously, ZnO nanoparticles (Fig. 3a) had strong absorption peaks in the UV region at 342 nm and 375 nm, which is the characteristic band of ZnO nanomaterials, i.e., typical wurtzite hexagonal structure.
The SEM image of ZnO nanoparticles (Fig. 4(a)) indicates that the product mainly consists of solid rod-like structures and has a crystalline structure.
Ashok Kumar, Hui-Wen Cheng, Shen-Ming Chen*, Reactive & Functional Polymers 69 (2009) 364-370 [10] Jungang Hou*, Rui Cao, Zheng Wang, Shuqiang Jiao*, Hongmin Zhu, Journal of Hazardous Materials 217-218(2012) 177-186 [11] Jing Huang1, Taili Yang2, Yanfei Kang2, Yang Wang2, Shurong Wang2*, Journal of Natural Gas Chemistry 20(2011) 515-919 [12] Volkan Eskizeybeka, Fahriye Sarib, Handan Gülce b,*, Ahmet Gülceb, Ahmet AvcIa, Applied Catalysis B: Environmental 119-120(2012) 197-206 [13] Ali OladRahimeh Nosrati, Res Chem Intermed, DOI 10. 1007/s11164-011-0349-0 [14] Sadia AmeenM.