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Author publications

Valdis Kampars

3 linked publication records

Author: Valdis Kamparsclear all
Showing 1-3 of 3 records
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SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Energy and Clean Technologies
Publication

THE EFFECT OF TEMPERATURE ON METHANOL SYNTHESIS VIA CO2 HYDROGENATION AT LOW PRESSURE OVER ZnO/CuO/SBA-15/KAOLIN CATALYST

(STEF92 Technology, 2021-12-20, Zane Šustere, Valdis Kampars, Helle‐Mai Piirsoo, Hugo Mändar, Aile Tamm)

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The hydrogenation of carbon dioxide (CO2) to methanol in presence of nanocatalysts has been reported as the one of the most economical and effective ways to reduce CO2 emissions. Over the past several decades, numerous efforts have been made to develop effective catalysts for CO2 hydrogenation to methanol. Among these, the CuO and ZnO based catalysts were highly active for methanol synthesis. Many studies have shown that SBA-15 (Santa Barbara Amorphous or mesoporous silica has good application prospects as a catal...

Ecology and Environmental Protection2021
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Energy and Clean Technologies
Publication

BIOFUEL VIA INTERESTERIFICATION OF RAPESEED OIL WITH METHYL ACETATE IN PRESENCE OF POTASSIUM t-BUTOXIDE/THF

(STEF92 Technology, 2018-06-20, Valdis Kampars)

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Transesterification does not allow to make full conversion of oil to biodiesel because the glycerol as a by-product cannot be included in the composition of biofuel. The development of methods for full conversion of raw material to biofuel with higher yield remains entirely relevant. Interesterification, a reaction of vegetable oil with methyl acetate, constitutes a full conversion process which has not been investigated sufficiently. Instead of glycerol, the interesterification reaction gives triacetin (TA) which...

Ecology and Environmental Protection2018
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies
Publication

BIODIESEL PRODUCTION VIA INTERESTERIFICATION OF RAPESEED OIL WITH ALKYL ACETATE IN PRESENCE OF POTASSIUM tert-BUTOXIDE

(STEF92 Technology, 2017-06-20, Valdis Kampars, Kristaps Malins, Zane Sustere, Ruta Kampare)

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The dominating feedstock for biodiesel production is still a vegetable oil and cost of the oil composes 80-85% of the production costs, therefore the development of the more efficient methods for biofuel production from vegetable oil remains crucial. The transesterification of oil proceeds with the production of side product: glycerol, which cannot be a part of the composition of fuel. Chemical interesterification of oil with alkyl acetate produce a mixture of fatty acid esters and triacetin. Triacetin is a fuel b...

Ecology and Environmental Protection2017
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