Mechanism study on the influence of in situ SOx removal on N2O emission in CFB boiler

2015 ◽  
Vol 333 ◽  
pp. 194-200 ◽  
Author(s):  
Lingnan Wu ◽  
Wu Qin ◽  
Xiaoying Hu ◽  
Changqing Dong ◽  
Yongping Yang
Keyword(s):  
N2o Emission ◽  
Mechanism Study ◽  
Cfb Boiler

Regioselective Thermal Reaction between Triethylamine and C60Revisited: X-ray Confirmation of the Pentane-Fused Adduct and in Situ Mechanism Study

2015 ◽  
Vol 2015 (26) ◽  
pp. 5742-5746 ◽  
Author(s):  
Muqing Chen ◽  
Wangqiang Shen ◽  
Lipiao Bao ◽  
Wenting Cai ◽  
Yunpeng Xie ◽  
...  
Keyword(s):  
Thermal Reaction ◽  
Mechanism Study ◽  
X Ray

scholarly journals A Strategy of In Situ Catalysis and Nucleation of Biocompatible Zinc Salts of Amino Acids towards Poly(l-lactide) with Enhanced Crystallization Rate

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 790 ◽  
Author(s):  
Yuan Liang ◽  
Meili Sui ◽  
Maomao He ◽  
Zhiyong Wei ◽  
Wanxi Zhang
Keyword(s):  
Amino Acids ◽  
Crystallization Rate ◽  
Mechanism Study ◽  
Dual Roles ◽  
One Pot ◽  
Amino Acid Ligand ◽  
Nucleation Effect ◽  
New Strategy ◽  
Zinc Salts

The intrinsic drawback of slow crystallization rate of poly(l-lactide) (PLLA) inevitably deteriorates its final properties of the molded articles. In this work, we proposed a new strategy towards poly(l-lactide) with enhanced crystallization rate by ring opening polymerization (ROP) of l-lactide (l-LA) catalyzed by biocompatible zinc salts of amino acids. For the first time we developed a one-pot facile method of zinc salts of amino acids acting dual roles of catalysis of l-LA polymerization and in situ nucleation of the as-prepared PLLA. Nine zinc salts of different amino acids, including three kinds of amino acids ligands (alanine, phenylalanine, and proline) with l/d-enantiomers and their equimolar racemic mixtures, were first prepared and tested as catalysts of l-LA polymerization. A partial racemization was observed for zinc salts of amino acids whereas no racemization was detected for the reference stannous octoate. The polymerization mechanism study showed that the interaction of zinc salts of amino acids and benzyl alcohol forms the actual initiator for l-LA polymerization. Isothermal crystallization kinetics analysis showed that the residual zinc salts of amino acids exhibited a significant nucleation effect on PLLA, evidenced by the promotion of the crystallization rate, depending on the amino acid ligand and its configuration. Meanwhile, the residual zinc salts of amino acids did not compromise the thermal stability of the pristine PLLA.

Thermosetting mechanism study of silicon-containing polyarylacetylene via in situ FTIR and solid-state NMR spectroscopy

2018 ◽  
Vol 136 (13) ◽  
pp. 47301 ◽  
Author(s):  
Xintong You ◽  
Shifeng Deng ◽  
Yanchun Huang ◽  
Zhongqi Liu ◽  
Yanhong Hu
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
In Situ Ftir ◽  
Mechanism Study ◽  
Solid State Nmr Spectroscopy

scholarly journals Operando Investigation of the Locally Enhanced Electric Field Treatment (LEEFT) Harnessing Lightning-Rod Effect for Rapid Bacteria Inactivation

2021 ◽  
Author(s):  
Ting Wang ◽  
Devin k. Brown ◽  
Xing Xie
Keyword(s):  
Electric Field ◽  
Large Scale ◽  
Side Reactions ◽  
Ros Generation ◽  
Mechanism Study ◽  
Membrane Pore ◽  
Bacteria Inactivation ◽  
Pore Closure ◽  
Electric Field Treatment

Abstract The growth of undesired bacteria causes numerous problems. Here, we show that locally enhanced electric field treatment (LEEFT) can cause rapid bacteria inactivation by electroporation without any side reactions. The bacteria inactivation is studied in situ at the single-cell level on a lab-on-a-chip that has nanowedge-decorated electrodes. Rapid bacteria inactivation occurs specifically at nanowedge tips where the electric field is enhanced due to the lightning-rod effect. The mechanism study shows that the bacteria inactivation is caused by electroporation induced by the locally enhanced electric field. The bacteria inactivation performance depends on the strength of the enhanced electric field instead of the applied voltage, and no ROS generation is detected when >90% bacteria inactivation is achieved. Quick membrane pore closure under moderate LEEFT indicates that electroporation is the predominant mechanism. LEEFT only requires facile treatment to achieve bacteria inactivation, which is safe for treating delicate samples and energy-efficient for large scale applications. The findings in this work can provide strong supports for the future applications of LEEFT.

scholarly journals OPTIMIZATION OF NITROGEN MINERAL FERTILIZATION OF AGRICULTURAL CULTURES BY THE PARAMETERS OF THE INTENSITY OF THE NITROGEN FIXATION AND DENITRIFICATION PROCESSES

2019 ◽  
Vol 30 ◽  
pp. 3-12
Author(s):  
V. V. Volkohon ◽  
S. B. Dimova ◽  
К. І. Volkohon ◽  
V. P. Gorban ◽  
N. P. Shtanko ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
N2o Emission ◽  
Mineral Nitrogen ◽  
Mineral Fertilizers ◽  
Nitrogen Compounds ◽  
Mineral Fertilization ◽  
Nitrogen Fixation Activity ◽  
Nitrogen Fertilizer Rate ◽  
Biological Nitrogen

Objective. Investigate the performance of the nitrogen fixation and process of N-N2O loss un-der the cultivation of potatoes and peas on the leached chornozem under various mineral agrarian backgrounds and the use of microbial preparations and to determine the ecological compromise normal rate of mineral nitrogen, under which the emission losses of nitrogen compounds will not exceed the intake of “biological” nitrogen in agrocenoses. Methods. Field experiment, gas chroma-tographic. Results. Studies of the activity of nitrogen fixation and N2O emission in situ in potato and pea agrocenoses using different rates of mineral fertilizers and microbial preparations, with subsequent calculations of the parameters of intake of the “biological” nitrogen and emission loss-es of the element indicate the possibility of determining the conditions (doses of mineral nitrogen) for which equality between profit and non-productive expenditure of the nitrogen balance is achieved. This amount of mineral nitrogen can be considered environmentally permissible, its ex-cess is undesirable due to a decrease in the intake of “biological” nitrogen and increased activity of the denitrification process. For potatoes grown on leached chornozem, environmentally permis-sible nitrogen fertilizer rate should be considered as 80 kg/ha, for peas — 60 kg/ha. The use of mi-crobial preparations in the cultivation of crops promotes an increase in the range of environmen-tally permissible normal rates of mineral nitrogen due to the formation of conditions under which the bacterization of plants require more nitrogen compounds to ensure a constructive metabolism, which additionally to increased nitrogen fixation activity is accompanied by an increase in the level of consumption of mineral nitrogen in the soil. At the same time, the activity of biological denitrifi-cation becomes reduced. Based on the obtained parameters, a model of optimization of nitrogen mineral fertilization of agricultural cultures was developed. Conclusion. It is advisable to deter-mine the ecologically permissible normal rates of mineral nitrogen fertilization of crops by the per-formance indices of the nitrogen fixation process and N-N2O losses. In this case, the emission losses of nitrogen compounds should not exceed the levels of intake of biologically bound nitrogen in ag-rocenoses.

Reaction mechanism of copper azide nanowires array

2021 ◽  
pp. 2140014
Author(s):  
Yanlan Wang ◽  
Fang Zhang ◽  
Lei Zhang ◽  
Ruishan Han ◽  
Feipeng Lu
Keyword(s):  
Gas Phase ◽  
Hydrazoic Acid ◽  
Copper Nanowires ◽  
Mechanism Study ◽  
Oxidation Degree ◽  
Highly Sensitive ◽  
Depth Study ◽  
The Relationship ◽  
Nanowires Array

In-situ growth of copper azide has endowed this highly sensitive primary explosive new life, but its mechanism study is not enough to support its in-depth study. Hence, azidation reaction was conducted on highly ordered copper nanowires array, which could provide effective channels for gas phase reactant (hydrazoic acid, HN3) to penetrate the solid, further study the mechanism of azidation reaction on copper azide nanowires array, and clarify the relationship between the microstructure and its azidation degree. Gas–solid in-situ azidation technique was used for this in-depth study. The effects of reaction temperature on formation of gaseous HN3 were studied by isothermal thermogravimetry. The azidation results were analyzed by SEM and XRD, the effects of the reaction time, diameter of copper nanowires array precursor and oxidation degree on the azidation degree were studied in detail. This work not only provided deep investigation on the azidation process, but also offered effective guidance for the synthesis of copper azide nanowires array.

Catalytic effects of inherent AAEM on char gasification: A mechanism study using in-situ Raman

Energy ◽  
2022 ◽  
Vol 238 ◽  
pp. 122074
Author(s):  
Junqin Yu ◽  
Weidong Xia ◽  
Chinnathan Areeprasert ◽  
Lu Ding ◽  
Kentaro Umeki ◽  
...  
Keyword(s):  
Mechanism Study ◽  
Char Gasification ◽  
In Situ Raman ◽  
Catalytic Effects

Asphaltenes Dissolution Mechanism Study by in Situ Raman Characterization of a Packed-Bed Microreactor with HZSM-5 Aluminosilicates

2018 ◽  
Vol 32 (12) ◽  
pp. 12205-12217 ◽  
Author(s):  
Weiqi Chen ◽  
Priyangi Vashistha ◽  
Andrew Yen ◽  
Nikhil Joshi ◽  
Yogesh Kapoor ◽  
...  
Keyword(s):  
Packed Bed ◽  
Dissolution Mechanism ◽  
Mechanism Study ◽  
In Situ Raman ◽  
Raman Characterization

Bi2WO6/Ag3PO4–Ag Z-scheme heterojunction as a new plasmonic visible-light-driven photocatalyst: performance evaluation and mechanism study

2019 ◽  
Vol 43 (3) ◽  
pp. 1275-1284 ◽  
Author(s):  
Maryam Amiri ◽  
Kheibar Dashtian ◽  
Mehrorang Ghaedi ◽  
Soleiman Mosleh ◽  
Ramin Jannesar
Keyword(s):  
Performance Evaluation ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Mechanism Study ◽  
Visible Light Driven ◽  
Ultrasound Assisted

The Bi2WO6/Ag3PO4–Ag Z-scheme heterojunction, as a novel plasmonic visible-light-driven photocatalyst, was prepared by ultrasound assisted in situ precipitation and the hydrothermal method and was further characterized using multiple techniques.

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