LCA Application to Chemical Synthesis at Laboratory Scale

Synthesis of novel WO3/ZrSiO4 catalysts for dehalogenation of halogenated hydrocarbons

Metallurgical and Materials Engineering ◽

10.30544/411 ◽

2019 ◽

Vol 25 (1) ◽

pp. 31-37

Author(s):

Vesna Nikolic ◽

Željko Kamberović ◽

Milisav Ranitović ◽

Milorad Gavrilovski ◽

Zoran Anđić

Keyword(s):

Phase Composition ◽

Water Vapor ◽

Environmental Impact ◽

Chemical Synthesis ◽

Xrd Analysis ◽

Production Method ◽

Laboratory Scale ◽

Halogenated Hydrocarbons ◽

Synthesis Routes ◽

Novel Catalyst

This research aimed to develop a novel catalyst based on WO3/ZrSiO4 system for halogenated hydrocarbons processing. The production method of this catalyst involved extrusion and as such was simplified compared to thermo-chemical synthesis routes. It had a reduced number of process stages and a lower environmental impact at the same time. In order to examine the phase composition of the catalyst after sintering at 800 °C, the XRD analysis was carried out. The catalyst was then tested in chlorodifluoromethane dehalogenation process on laboratory scale at temperatures of 300, 400 and 500 °C in the presence of water vapor. Catalyst achieves high dehalogenation efficiencies of 88.6, 95.9, and 99.5 % for each of the process temperatures, respectively. Obtained results are in the range with those achieved by using thermo-chemically prepared dehalogenation catalysts.

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The scalability in the mechanochemical syntheses of edge functionalized graphene materials and biomass-derived chemicals

Faraday Discussions ◽

10.1039/c4fd00007b ◽

2014 ◽

Vol 170 ◽

pp. 223-233 ◽

Cited By ~ 31

Author(s):

Richard G. Blair ◽

Katerina Chagoya ◽

Scott Biltek ◽

Steven Jackson ◽

Ashlyn Sinclair ◽

...

Keyword(s):

Chemical Synthesis ◽

Value Added ◽

Discrete Element ◽

Reactor Design ◽

Laboratory Scale ◽

Reaction Pathways ◽

Functionalized Graphene ◽

Thermal Monitoring ◽

Crucial Step ◽

Impact Forces

Mechanochemical approaches to chemical synthesis offer the promise of improved yields, new reaction pathways and greener syntheses. Scaling these syntheses is a crucial step toward realizing a commercially viable process. Although much work has been performed on laboratory-scale investigations little has been done to move these approaches toward industrially relevant scales. Moving reactions from shaker-type mills and planetary-type mills to scalable solutions can present a challenge. We have investigated scalability through discrete element models, thermal monitoring and reactor design. We have found that impact forces and macroscopic mixing are important factors in implementing a truly scalable process. These observations have allowed us to scale reactions from a few grams to several hundred grams and we have successfully implemented scalable solutions for the mechanocatalytic conversion of cellulose to value-added compounds and the synthesis of edge functionalized graphene.

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Polar Organic Pollutants in Groundwater: Experimental Approaches to Biodegradation During Subsoil Passage

The Scientific World JOURNAL ◽

10.1100/tsw.2002.207 ◽

2002 ◽

Vol 2 ◽

pp. 1243-1246

Author(s):

T.P. Knepper

Keyword(s):

Chemical Synthesis ◽

Organic Compounds ◽

Organic Pollutants ◽

Fixed Bed ◽

Laboratory Scale ◽

Polar Organic Compounds ◽

Fixed Bed Bioreactor ◽

Experimental Approaches ◽

By Products ◽

Selection Of

A selection of polar organic compounds was investigated for their biodegradation on a laboratory scale fixed-bed bioreactor and the decline of the parent compounds besides the formation of metabolites was monitored. Of particular interest was the investigation into the degradation of pesticides, especially isoproturon (IPU), surfactants and industrial by-products of chemical synthesis. The results from the laboratory degradation experiments are compared to findings in groundwater.

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