Search for dissertations about: "Kemiteknik och kemisk teknologi Chemical technology and engineering"

Showing result 1 - 5 of 152 swedish dissertations containing the words Kemiteknik och kemisk teknologi Chemical technology and engineering.

2. 1. Defects in Zeolite Catalysts and Membranes

   Author : Mohammad Sadegh Nabavi; Farid Akhtar; Johanne Mouzon; Bhaskar Reddy Sudireddy; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemisk teknologi; Chemical Technology;

   Abstract : ZSM-5 is one of the most well-known zeolites. It has been synthesized for many different applications, including as catalyst for catalytic reactions and as a membrane in separation processes.  The main goal of this thesis is to investigate and characterize the defects in crystal and film growth of ZSM-5 for modification purposes. READ MORE

4. 2. Deactivation of cobalt and nickel catalysts in Fischer-Tropsch synthesis and methanation

   Author : Javier Barrientos; Magali Boutonnet; Claude Mirodatos; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cobalt; nickel; Fischer-Tropsch synthesis; methanation; deactivation; carbonyl; sintering; carbon fomation. sulfur; poisoning; Chemical Engineering; Kemiteknik;

   Abstract :             A potential route for converting different carbon sources (coal, natural gas and biomass) into synthetic fuels is the transformation of these raw materials into synthesis gas (CO and H2), followed by a catalytic step which converts this gas into the desired fuels. The present thesis has focused on two catalytic steps: Fischer-Tropsch synthesis (FTS) and methanation. READ MORE

5. 3. Modelling Chemical Weathering in Different Scales

   Author : Johan Holmqvist; Kemiska institutionen; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biochemical technology; Kemiteknik och kemisk teknologi; Chemical technology and engineering; Sustainable biomass production; Kriging; Illite; Epidote; Chemical weathering; Dissolution; Biokemisk teknik; Silviculture; forestry; forestry technology; Skogsvetenskap; skogsbruk; skogsteknik;

   Abstract : Chemical weathering is one of the most important processes supporting life on Earth. Chemical weathering continuously contributes macronutrients and micronutrients to the soil solution. These recycling, essential elements are used as building blocks for all organic living matter. READ MORE

6. 4. Catalytic conversion of syngas to ethanol and higher alcohols over Rh and Cu based catalysts

   Author : Luis Gagarin Lopez Nina; Magali Boutonnet; Mario Montes Ramírez; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermochemical process; ethanol; higher alcohols; mesoporous catalysts; rhodium; copper; metal promoters; Chemical Engineering; Kemiteknik;

   Abstract : The thermochemical process converts almost any kind of biomass to a desired final product, i.e. gaseous or liquid transportation fuels and chemicals. The transportation fuels obtained in this way are renewable biofuels, which are alternatives to fossil fuels. READ MORE

7. 5. Zeolite adsorbents and catalysts for the recovery and production of biochemicals

   Author : Abrar Faisal; Mattias Grahn; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zeolites; Adsorbents; Catalyst; Butanol; Arginine; ZSM-5; Chemical Technology; Kemisk teknologi;

   Abstract : Fossil based energy resources are dominating the world’s primary energy consumption for the last century. However, with decreasing crude oil reservoirs and the role they play in global warming by emitting greenhouse gases, the focus has been turned towards improved utilization of renewable resources and the need for new, sustainable fuels and chemicals is more urgent than ever. READ MORE