Search for dissertations about: "CO2 accumulation"

Showing result 1 - 5 of 46 swedish dissertations containing the words CO2 accumulation.

2. 1. Secondary chlorophyll a luminescence decay kinetics from green algae and higher plants : mechanisms and application

   Author : Lars-Göran Sundblad; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; luminescence; fluorescence; photosynthesis; far red; CO2 accumulation; S-states; QA; reverse coupling; qE; frost hardiness;

   Abstract : Barley protoplasts were shown to be a suitable experimental system for studies on the relative maximum during the decay of luminescence observed in most photosynthetic systems after excitation with far red light and in the presence of O2. The far red induced relative luminescencemaximum was shown to be a result of three coinciding events:*Randomization of the S-states of the water splitting system during illumination with far red light. READ MORE

4. 2. A tandem Catalyst for hydrogenation of CO2 to light olefins — The role of the zeolite component

   Author : Wei Di; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Brønsted acid density; MTO reaction; CO2 hydrogenation; tandem catalysts; HCPs; methanol-intermediate; pre-coking; Al distribution; light olefins; SSZ-13 zeolite;

   Abstract : The catalytic conversion of waste CO2 into light olefins offers a sustainable pathway for green chemicals production in the future. Over a tandem catalyst with the bifunctional active sites for methanol synthesis (CTM) and methanol to olefins (MTO), CO2 can be efficiently converted via intermediate methanol into a mixture of light olefins (ethylene, propene, butene). READ MORE

5. 3. Forests and Greenhouse gases. Fluxes of CO2, CH4 and N2O from drained forests on organic soils

   Author : Karin von Arnold; Leif Klemedtsson; Mats Nilsson; Björn Hånell; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Greenhouse gases; GHG; fluxes of CO2; CH4; drained forests; organic soils; Skogsbotanik; miljöaspekter; växthusgaser; Water in nature and society; Vatten i natur och samhälle;

   Abstract : One of the largest environmental threats believed to be facing us today is global warming due to the accumulation of green house gases (GHG). The concentrations of GHG in the atmosphere are a result of the net strength of different sinks and sources. READ MORE

6. 4. Precipitating Amine Absorption Systems for Carbon Capture

   Author : Hanna Karlsson; Avdelningen för kemiteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CO2 capture; Non-aqueous; AMP; Solubility; Heat of absorption;

   Abstract : Carbon capture using amine-based absorption is an established technology for the separation of gaseous CO2. It is used in the upgrading of gaseous fuels, and it has also been suggested that it could play a crucial role in the mitigation of climate change through post-combustion carbon capture and sequestration (CCS), and by creating carbon sinks through bioenergy CCS. READ MORE

7. 5. CO, CO2 and N2 hydrogenation reactions probed by operando x-ray photoelectron spectroscopy

   Author : David Degerman; Anders Nilsson; Miquel Salmeron; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Operando Catalysis; Hydrogenation reactions; High-Pressure X-Ray Photoelectron Spectroscopy; Syngas; kemisk fysik; Chemical Physics;

   Abstract : Catalytic reactions are essential for generating the chemical products required by the modern society. In particular, reactions related to clean energy storage and generation as well as fertilizer production are facilitated by catalysts. However, the processes are often insufficiently understood at a mechanistic level. READ MORE