A new strategy for CO2 utilization with waste plastics: conversion of hydrogen carbonate into formate using polyvinyl chloride in water

2020 ◽  
Vol 22 (2) ◽  
pp. 352-358 ◽  
Author(s):  
Lihui Lu ◽  
Heng Zhong ◽  
Tianfu Wang ◽  
Jianeng Wu ◽  
Fangming Jin ◽  
...  
Keyword(s):  
Polyvinyl Chloride ◽  
Single Step ◽  
Waste Plastics ◽  
Co2 Utilization ◽  
Green Approach ◽  
Hydrogen Carbonate ◽  
New Strategy

A new and green approach for hydrogen carbonate reduction and PVC dechlorination in water in a single step.

Study on dechlorination technology for municipal waste plastics containing polyvinyl chloride and polyethylene terephthalate

2010 ◽  
Vol 12 (2) ◽  
pp. 108-122 ◽  
Author(s):  
Masaaki Fukushima ◽  
Beili Wu ◽  
Hidetoshi Ibe ◽  
Keiji Wakai ◽  
Eiichi Sugiyama ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Polyvinyl Chloride ◽  
Municipal Waste ◽  
Waste Plastics

scholarly journals Distinction and Separation of Polyvinyl Chloride from Waste Plastics.

2000 ◽  
Vol 37 (6) ◽  
pp. 435-441
Author(s):  
Keijirou TERASHITA ◽  
Shinichi SUGIMOTO ◽  
Kei MIYANAMI
Keyword(s):  
Polyvinyl Chloride ◽  
Waste Plastics

Microwave-assisted surface modification for the separation of polycarbonate from polymethylmethacrylate and polyvinyl chloride waste plastics by flotation

2016 ◽  
Vol 35 (3) ◽  
pp. 294-300
Author(s):  
Luoluo Huang ◽  
Hui Wang ◽  
Chongqing Wang ◽  
Junyao Zhao ◽  
Bo Zhang
Keyword(s):  
Potassium Permanganate ◽  
Polyvinyl Chloride ◽  
Treatment Time ◽  
Contact Angles ◽  
Separation Process ◽  
Infrared Spectrometry ◽  
Waste Plastics ◽  
Optimum Conditions ◽  
Water Contact ◽  
Microwave Assisted

Microwave-assisted potassium permanganate modification (MPPM) was used for the flotation separation of polycarbonate (PC) from polyvinyl chloride (PVC) and polymethylmethacrylate (PMMA) waste plastics. The separation process was optimized by investigating the potassium permanganate concentration, treatment time, flotation time and frother concentration. MPPM selectively reduced the flotation recovery of PC. The optimum conditions were determined to be: potassium permanganate concentration, 2 mM/L; treatment time, 1 min; frother concentration, 17.57 g/L; and flotation time, 1 min. PC was efficiently separated from PVC and PMMA under the optimum conditions. The purity of the separated PC was 97.71%. The purity and recovery of PVC and PMMA were both >95%. The modification mechanism was investigated using the water contact angles, Fourier transform infrared spectrometry and scanning electron microscopy. This work provides technical insights into the industrial recycling of waste plastics.

Swarm Coordination Under Conflict and Use of Enhanced Lyapunov Control

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Daniel A. Sierra ◽  
Paul McCullough ◽  
Nejat Olgac ◽  
Eldridge Adams
Keyword(s):  
Stability Analysis ◽  
Time Window ◽  
Single Step ◽  
Complex Nature ◽  
Control Logic ◽  
Wide Range ◽  
New Strategy ◽  
Dissipative Control ◽  
Parametric Effects ◽  
Multi Agent

We consider hostile conflicts between two multi-agent swarms. First, we investigate the complex nature of a single pursuer attempting to intercept a single evader (1P-1E), and establish some rudimentary rules of engagement. The stability repercussions of these rules are investigated using a Lyapunov-based stability analysis. Second, we extend the modeling and stability analysis to interactions between multi-agent swarms of pursuers and evaders. The present document considers only swarms with equal membership strengths for simplicity. This effort is based on a set of suggested momenta deployed on individual agents. The control of group pursuit is divided into two phases: the approach phase during which the two swarms act like individuals in the 1P-1E interaction, and the assigned pursuit phase, where each pursuer follows an assigned evader. A simple, single-step dissipative control strategy, which results in undesirable control chatter, is considered first. A distributed control logic is then introduced, in order to ameliorate the chatter problems. In this new logic, the dissipative control action is spread out over a time window. A wide range of case studies is tested in order to quantify the parametric effects of the new strategy.

scholarly journals Synthesis of nanomaterials using expired medicines: an eco-friendly option

2012 ◽  
Vol 2 (1) ◽  
pp. 7 ◽  
Author(s):  
Anal K. Jha ◽  
Kamal Prasad
Keyword(s):  
Single Step ◽  
Molecular Organization ◽  
Cds Nanoparticles ◽  
X Ray Diffraction ◽  
Green Approach ◽  
Transmission Electron ◽  
Novel Method ◽  
Molecular Forces ◽  
First Time ◽  
Expired Medicines

Expired medicines are a burden to the environment. In this paper, a novel method is suggested to reutilize expired medicines in order to assess the possibilities of synthesizing a variety of nanomaterials. To this end, expired flouroquinolone (norfloxacin) and tinidazole combinations were used to synthesize metal (Au), oxide (ZrO<sub>2</sub>) and chalcognide (CdS) nanoparticles using for the first time a green chemistry approach. Au, ZrO<sub>2</sub> and CdS nanoparticles are available in convenient sizes of 6 nm, 26 nm and 18 nm, respectively, and remain stable for at least six months. This novel procedure is possible thanks to their molecular organization and elements. The inclusion of a fluorine atom in a drug molecule may influence both the disposition of the drug and its interaction with its pharmacological target; for example, the effects of fluorine substitution on the inter- and intra-molecular forces that affect binding of ligands. The presence of sulfur in the tinidazole molecules may also have contributed towards synthesis through proton withdrawal. The nanomaterials synthesized in this way were characterized using X-ray diffraction analysis and transmission electron microscopy to identify the formation of the desired nanoparticles. This single-step green approach is very convenient, simple and can be extended to synthesize a variety of nanomaterials that might find new technological and pharmaceutical applications.

scholarly journals Mesoporous-silica-coated palladium-nanocubes as recyclable nanocatalyst in C–C-coupling reaction – a green approach

RSC Advances ◽  
2020 ◽  
Vol 10 (44) ◽  
pp. 26504-26507
Author(s):  
Darius Rohleder ◽  
Philipp Vana
Keyword(s):  
Mesoporous Silica ◽  
Coupling Reaction ◽  
Product Yield ◽  
Silica Shell ◽  
Single Step ◽  
Core Shell ◽  
Coating Process ◽  
Coupling Reactions ◽  
Green Approach

A green approach: in a single-step coating process a mesoporous silica shell was tailored onto palladium-nanocubes. Along with a PEG-matrix this core–shell-nanocatalyst could be recovered after C–C-coupling reactions and reused without any significant decrease in product yield.

Unique perforated graphene derived from Bougainvillea flowers for high-power supercapacitors: a green approach

Nanoscale ◽  
2017 ◽  
Vol 9 (14) ◽  
pp. 4801-4809 ◽  
Author(s):  
Rajendra P. Panmand ◽  
Purnima Patil ◽  
Yogesh Sethi ◽  
Sunil R. Kadam ◽  
Milind V. Kulkarni ◽  
...  
Keyword(s):  
Surface Area ◽  
High Power ◽  
High Surface ◽  
High Surface Area ◽  
Single Step ◽  
Step Method ◽  
Green Approach ◽  
Template Free ◽  
First Time

Herein, we demonstrated a green approach for the synthesis of high surface area (850 m2 g−1) mesoporous perforated graphene (PG) from Bougainvillea flower for the first time using a template free single-step method.

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