Study of the reaction mechanism for preparing powdered activated coke with SO_(2)adsorption capability via one-step rapid activation method under flue gas atmosphere

In this study,the impact of different reaction times on the preparation of powdered activated carbon(PAC)using a one-step rapid activation method under flue gas atmosphere is investigated,and the underlying reaction mechanism is summarized.Results indicate that the reaction process of this method can be divided into three stages:stage I is the rapid release of volatiles and the rapid consumption of O_(2),primarily occurring within a reaction time range of 0-0.5 s;stage II is mainly the continuous release and diffusion of volatiles,which is the carbonization and activation coupling reaction stage,and the carbonization process is the main in this stage.This stage mainly occurs at the reaction time range of 0.5 -2.0 s when SL-coal is used as material,and that is 0.5-3.0 s when JJ-coal is used as material;stage III is mainly the activation stage,during which activated components diffuse to both the surface and interior of particles.This stage mainly involves the reaction stage of CO_(2)and H2O(g)activation,and it mainly occurs at the reaction time range of 2.0-4.0 s when SL-coal is used as material,and that is 3.0-4.0 s when JJ-coal is used as material.Besides,the main function of the first two stages is to provide more diffusion channels and contact surfaces/activation sites for the diffusion and activation of the activated components in the third stage.Mastering the reaction mechanism would serve as a crucial reference and foundation for designing the structure,size of the reactor,and optimal positioning of the activator nozzle in PAC preparation.

ON PREPARING TO TEACH ABOUT FROST

ＯＮＰＲＥＰＡＲＩＮＧＴＯＴＥＡＣＨＡＢＯＵＴＦＲＯＳＴＰｈｉｌｉｐｓＳａｌｍａｎＤｅｐａｒｔｍｅｎｔｏｆＥｎｇｌｉｓｈＣｌｅｖｅｌａｎｄＳｔａｔｅＵｎｉｖｅｒｓｉｔｙ【编者按】这篇文章是我院英语学科带头人谭志明教授在美国讲学期间特约的第三篇稿件。本...

A Reproducible Approach of Preparing High-Quality Overdoped Bi_2Sr_2CaCu_2O_(8+δ) Single Crystals by Oxygen Annealing and Quenching Method

We report a reproducible approach in preparing high-quality overdoped Bi2 Sr2 CaCu2 08＋δ （Bi2212） single crystals by annealing Bi2212 crystals in high oxygen pressure followed by a fast quenching. In this way, high-quality overdoped and heavily overdoped Bi2212 single crystals are obtained by controlling the annealing oxygen pressure. We find that, beyond a limit of oxygen pressure that can achieve most heavily overdoped Bi2212 with a Tc N63 K, the annealed Bi2212 begins to decompose. This accounts for the existence of the hole-doping limit and thus the Tc limit in the heavily overdoped region of Bi2212 by the oxygen annealing process. These results provide a reliable way in preparing high-quality overdoped and heavily overdoped Bi2212 crystals that are important for studies of the physical properties, electronic structure and superconductivity mechanism of the cuprate superconductors.

AN IMPROVED METHOD FOR PREPARING 2—ALKOXY—5—FLUORO—3H—4—PYRIMIDONE~△

In this paper, we report an improved method for preparing 2--alkoxy 5 fluoro--3H --4--pyrimidone from 2--chloro--5--fluoro--3H--4--pyrimidone and sodium alkoxide under normal pressure at reflux temperature. Some new compounds were synthesized in higher yield by this method.

A Scheme for Preparing Schrödinger Cat States with Controllable Manners

A scheme to generate superpositions of coherent states with variable amplitudes,phases and weighting factors is proposed.It provides experimental possibility for preparing an arbitrary Schrödinger cat state.

INDUCTION—POLYMERIZATION OF PREPARING POLYMERS OF REGULAR STRUCTURE

Induction-Polymerization is a novel method for preparing polymers of regular structure. In the presence of a special macromolecular compound, monomer molecules are aggregeted regularly around one or more growth points and polymerized to polymer of regular structure. Regularity of structure of the polyacrylamide prepared by this means has been verified with electron diffractograms, DSC curve and IR spectrum of the polymer.

STUDY ON THE ELECTROCHEMICAL BEHAVIOR OF ION EXCHANGE MEMBRANE IN PREPARING POTASSIUM CARBONATE

This investigation describes the one step preparation of potassium carbonate by electrolysis of potas-sium chloride solution in electrolyzers with various Nation membranes.Potassium bicarbonate solution wasfed to the cathode compartment,where it was converted into carbonate by reaction with the hydroxideformed at cathode.Because of the low OH^- concentration in the cathode compartment,the back migrationof OH^- through the membrane was almost negligible,resulting in a higher current efficiency,say 90% or more.In this study,electroconductivity,mass transfer,current efficiency and cell voltage were measured.Thefeasibility of the process was discussed and the optimal conditions examined.

Guidelines for Preparing Comprehensive Regional Mafic Dyke Swarm Maps

Several regional maps of mafic dyke swarms(e.g.,Buchan and Ernst,2004,2013;Vuollo and Huhma,2005;Peng,2015)have been published in recent years,as well as an earlier global dyke compilation map(Ernst et al.,1996).

A Preparing Process of Quick-moving Leaf for TiNi Alloy

This paper reports a preparing process of quick moving leaf for TiNi shape memory alloy. Using the process. a series of quick moving leaves having different points of temperature. from 58 to 100℃. at which they jump up have been made. The quick moving leaves will be fully qualified as the electric switches that open and close themselves at proper temperatures.

A New Approach for Preparing SiC Particle-reinforced Aluminum Matrix Composites by Applying Electromagnetic Field

A new method for preparing SiC particle-reinforced aluminum matrix composites was introduced.In order to improve the ingot surface and homogeneity of structure,low frequency electromagnetic field was applied during the direct chilling casting process.The experimental results show that the new method can be used to prepare SiC particle-reinforced aluminum matrix composites;under the effects of the low frequency electromagnetic field,the microstructure of ingot is refined and the distribution of SiC particles is improved.

PREPARING FOR THE 21ST CENTURY:INTRODUCING A SERVICE APPROACH

ＰＲＥＰＡＲＩＮＧＦＯＲＴＨＥ２１ＳＴＣＥＮＴＵＲＹ：ＩＮＴＲＯＤＵＣＩＮＧＡＳＥＲＶＩＣＥＡＰＰＲＯＡＣＨＴｈｅｗｏｒｌｄｋｎｏｗｓＣｈｉｎａｆｏｒｉｔｓｌａｒｇｅｐｏｐｕｌａｔｉｏｎｓｉｚｅ１．２ｂｉｌｌｉｏｎ－ａｎｄｆｏｒｉｔｓｓｔｒｏｎｇｆａ...

Preparing for Professional Challenges in the Future

ＰｒｅｐａｒｉｎｇｆｏｒＰｒｏｆｅｓｓｉｏｎａｌＣｈａｌｌｅｎｇｅｓｉｎｔｈｅＦｕｔｕｒｅＢｙｓｔａｆｆｒｅｐｏｒｔｅｒＨＯＵＲＵＩＬＩＬｉＹｕａｎｘｕｎ，ｆａｍｏｕｓｅｎｔｒｅｐｒｅｎｅｕｒａｎｄｄｉｒｅｃｔｏｒｏｆＨａｒｂｉｎＢｒｅｗｅｒｙ，ｉｓ...

Double catholyte electrochemical approach for preparing ferrate-aluminum: a compound oxidant-coagulant for water purification

Ferrate is an excellent water treatment agent for its multi functions in oxidation, disinfection, coagulation and adsorption, but its coagulation ability depends on its dosage and is after its oxidation. This paper focuses on preparing a new kind of ferrate combined with alum to enhance its coagulation function for water purification. An effective electrolysis reactor was designed and employed in the test. Some key parameters in the process of electrolysis concerning the preparation efficiency, such as the current density, temperature and alkalinity were also investigated. The proper conditions for ferrate alum preparation were determined. Under the condition of 5V given voltage, 6h electrolyzing interval, below 2% alum concentration (in weight), a combined liquid ferrate alum products was successfully prepared, which contained 0.0294 mol/L FeO 2- 4 and 0.0302 mol/L total soluble ferron with 2% Al 2O 3. There was no insoluble ferron produced by controlling an optimum electrochemical condition.

A Comparison of Techniques for Preparing Somatic Chromosomes in Ribes Species

Ribes plants,like most of other fruit trees,are characterized by their large number but small size of somatic chromosomes.In the light of these special characteristics,we have examined several factorial combinations of material, pretreatment,slide preparing method and stain to identify the most promising techique for studying the chromosomes and further analyzing the karyotypes and chromosome banding of Ribes plants. The resuts indicated that the combination of root tip with pretreatment of 2 m molL-1 8-hydroxyquinoline plus 0.05% colchicine or 0.3% balm for 3～5 hours at 14℃,pre-hypotonic trcarment of 0.07mol L-1 KCl for 30 min, fixation in Carnoy's fluid,hydrolysis in 5% cellulase and 5% pectinase mixture for 4～5 hours at 25℃, post-hypotonic treatment in distilled water for half an hour and staining in Giemsa could make the chromosome prepa ration superior to other treatment combinations.

A Convenient Method for Preparing Shape-controlled ZnO Nanocrystals in a Polyol/Water Mixture System without Surfactants

A facile solution-phase route for the synthesis of shape-controlled ZnO nanocrystals in a polyol/water mixture system was developed. The obtained nanocrystals were characterized by X-ray diffraction, transmission electron microscopy and UV-visible absorption spectroscopy. The results indicate that modulating the adding ways of water has a significant effect on the shape of the obtained nanocrystals. The addition of small quantity of water can increase the growth rate of crystals and leads to the formation of different shapes. The resulting shapes of the novel structures are diverse, including spheres, cones, and teardrops, all of which are obtained without any additional surfactants. These studies concerning the shape evolution of nanocrystals should be valuable for further design and for greater understanding of advanced nanoscale building-block architectures.

A New Method of Preparing Alkanethiol-Protected Gold Nanoparticals

In a new two-phase system (tetrahydrofuran/saturated NaCl aqueous solution) monolayer protected clusters (MPCs) were prepared.The AuCl- 4 anion in saturated electrolyte aqueous solution was transferred into the organic phase of tetrahydrofuran by tetra-n-butylammonium bromide ((C 4H 9) 4NBr) and was reduced quickly by sodium borohydride in the presence of alkanethiol.The functionalized MPCs were characterized by solubility,transmission electron microscopy (TEM),Fourier transform infrared spectroscopy (FTIR),energy-dispersive X-ray (EDX) analysis and UV-vis spectroscopy.Electrochemical measurements of MPCs in CH 2Cl 2 exhibited 7 pairs of reversible voltammetric waves within the potential range of -1.0 to 1.0V (vs Ag/AgCl),which was ascribed to the quantized capacitance charging of nanoparticle double layers.All the results show that the new preparing method is feasible.

Scheme for probabilistic remotely preparing a multi-particle entangled GHZ state

This paper presents a scheme for probabilistic remote preparation of a three-particle entangled Greenberger-Horne-Zeilinger （GHZ） state via three-particle orthonormal basis projective measurement, and then directly generalize the scheme to multi-particle case. It is shown that by using N pairs of bipartite non-maximally entangled states as the quantum channel and N-particle orthonormal basis projective measurement, the multi-particle remote preparation can be successfully realized with a certain probability.

Simplistic Universal Protocols for Remotely Preparing Arbitrary Equatorial States

We first put forward a deterministic protocol to realize the remote preparation of arbitrary multi-qubit equatorial states via EPR pairs.A set of useful measurement basis is constructed which plays a key role.The receiver just needs to perform Pauli Z operations to recover the target state.Comparing with the previous protocols,the recovery operation is simplified and expressed by a general formula.As there are no universal protocols for high-dimensional systems,we further generalize to the case of multi-qudit equatorial states by means of Fourier transformation.It is worth mentioning that the proposed schemes can be extended to multi-party controlled remote state preparation.Moreover,we consider the effect of two-type decoherence noises.