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Luzhou, China

Wang Y.,CAS Institute of Process Engineering | Wang Y.,Chinese Institute of Urban Environment | Li Q.,China National Offshore Oil Corporation | Wang S.,Northeastern University China | And 4 more authors.
Industrial and Engineering Chemistry Research

This study is devoted to developing a continuous activated carbon (AC) production process integrating drying, carbonization, and physical activation without external heat input. The massive byproduct in the distilled spirit industry, distilled spirit lees (SL), was used as the raw material in this study. The kinetic behaviors in each step, including drying, carbonization, and activation, were first investigated via laboratory tests. The results show that the whole AC production process can be completed in 30 min, including most of the time for drying, several minutes for carbonization, and several seconds for activation. On the basis of these laboratory results, an integrated process for continuous production of AC was proposed. The mass and heat balance calculation demonstrated a good balance for the developed process technology, and a pilot plant treating 2000 kg of SL/h was in turn built and commissioned to run autothermally and continuously. This demonstrated thus the technology for application to granular feedstock such as SL, although the produced AC from SL had surface areas of only about 191 m2/g and relatively low adsorption values, including 610-630 mg/g for iodine and 20-30 mg/g for methylene blue, due to the too short activation time in the pilot activator. © 2013 American Chemical Society. Source

Hou C.,Chongqing University | Dong J.,Chongqing University | Zhang G.,Chongqing University | Lei Y.,University of Connecticut | And 6 more authors.
Biosensors and Bioelectronics

Artificial tongue systems are multisensory devices which are highly desirable for the analysis and recognition of complicated composition samples. Herein, a low-cost and simple colorimetric sensor array for identification and quantification of proteins were reported. Using prophyrin, porphyrin derivatives (mainly metalloporphyrins) and chemically responsive dyes as the sensing elements, the developed sensor array of artificial tongue showed a unique pattern of colorific change upon its exposure to proteins. The composite pattern for each sample was subjected to principal component analysis (PCA), thus providing a clustering map for more practical visualization. All the pure and mixed proteins, as well as denatured proteins, gave distinct patterns, thus resulting in their unambiguous identification. The PCA analysis also suggested that the unique pattern of colorific change may be due to the change of protein conformation and local environmental pH. These results demonstrate that the developed colorimetric artificial tongue system is an excellent sensing platform for identification and quantitative analysis of protein samples. © 2011. Source

Huo D.-Q.,Chongqing University | Zhang G.-P.,Chongqing University | Hou C.-J.,Chongqing University | Dong J.-L.,Chongqing University | And 6 more authors.
Fenxi Huaxue/ Chinese Journal of Analytical Chemistry

The development of colorimetric sensor array for the detection of natural amino acids is reported. Using a cross-responsive array containing a diverse family of chemically responsive dyes, the colorimetric sensor array provides enormous discriminatory power among different analytes. Digital imaging of the dye array before and after immersion provides a color change profile as a unique fingerprint for each specific analyte. The 6×6 array used in this research has 36 dyes that were sensitive to amino acids. A functional portable type apparatus was developed for data acquisition and data processing. Using colorimetric sensor arrays, 10 natural amino acids have been analyzed within 5 min of exposure at concentrations of 375 μ M. The digital data library generated was analyzed with statistical and chemometric methods, including principal component analysis (PCA) and linear discriminant analysis (LDA). Facile identification of all the amino acids was readily achieved using comparison of the color change profiles or a PCA score plot. Using LDA analysis, the classification accuracy of identification was 97%. These results suggest that colorimetric sensor arrays may prove to be useful for the identification of natural amino acids, and they also represent a potential application in the field of cell recognition, food quality assurance, and microbial identification. Copyright © 2010, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. Published by Elsevier Limited. All rights reserved. Source

Hou C.,Chongqing University | Dong J.,Chongqing University | Qin H.,Chongqing University | Huo D.,Chongqing University | Shen C.,Luzhoulaojiao Group Co.
Analytical Letters

The olfactory system is responsible for the discrimination and identification of myriad odorant molecules at very low concentrations. On the basis of the gene super family encoding olfactory receptors, it has led to the rapid development of cell based olfactory biosensors. Attempts are currently made not only to imitate the mechanism of the biological nose but also to utilize some of its sensor molecules as functional unities in olfactory biosensors. Recently, the development of olfactory biosensors has achieved rapid advances by using protein molecules and cells, even biological organs as functional elements, that is, odorant binding proteins (OBPs) and olfactory receptors (ORs) at the molecular level, cell based gene engineered cells or olfactory receptor neurons (ORNs), and mammalian olfactory organs. With using the living cells expressing olfactory signal proteins as sensing elements, the cell based biosensors have a naturally evolved selectivity to odorant molecules. Furthermore, the biosensors also have the capacity to respond to odorant in a physiologically relevant manner. In this paper, we briefly introduce the molecular basis of olfaction and summarize the cell based olfactory biosensors. © 2012 Copyright Taylor and Francis Group, LLC. Source

Yao C.,CAS Institute of Process Engineering | Yao C.,University of Chinese Academy of Sciences | Dong L.,CAS Institute of Process Engineering | Wang Y.,CAS Institute of Process Engineering | And 6 more authors.
Fuel Processing Technology

Distilled spirits Lees, rich in cellulose, water and N element, are difficult to burn efficiently and cleanly in grate chain stock boiler. The circulating fluidized bed decoupling combustion (CFBDC) was therefore proposed to burn the distilled spirits lees efficiently and with low-NOx emission. The pyrolysis behavior of the distilled spirits lees was investigated in a fluidized bed reactor for optimizing the pyrolysis conditions of the pyrolyzer in CFBDC. The results showed that the distilled spirits lees began to devolatize at 250 °C and at 350-450 °C the tar yield reached its maximum of about 16.3 wt.% (dry base). The chemical oxygen demand (COD) value of the condensed liquid reached its maximum of about 50,000 mg/L at 450 °C. With raising temperature the pyrolysis gas tended to contain more CO and H2 and less CO 2. The functional groups H-O, aliphatic C-H, aromatic ring, C=O and C-O were all presented in the char generated at low-temperatures, while only the C-O group was identified for the char from the pyrolysis at 650 °C. The article suggested that the pyrolysis for the CFBDC was better around 500 °C so that certain volatiles could remain in the char to sustain stable combustion. © 2011 Elsevier B.V. All rights reserved. Source

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