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Shah, Ayaz Ali

Shah, Ayaz Ali

PROJECT TITLE: Characterization and Optimization of Role of Aqueous Phase in Hydrothermal Liquefaction (HTL) Processing 

PhD period: 2018.03.15 – 2021.03.14.
Section: Fluid Mechanics and Combustion
Research Programme: Biomass
Supervisor: Lasse Rosendahl
Co-Supervisor: Saqib Sohail Toor
Contact Information

Collaborator: Dawood University of Engineering and Technology, Karachi.
Funding: Faculty Development Program, Higher Education Commission (HEC), Pakistan.


Due to rampant increase in Global energy demand, bio-fuels are getting most significant role in global world. Among all thermochemical technologies the Hydrothermal liquefaction (HTL) is one the outstanding techniques to convert wet biomass into bio crude at 270 to 350˚ C, at pressure of 25 MPa. Mostly, depending upon the feedstock and process conditions HTL gives four major products, namely, gaseous phase, water phase, solid phase, and the desired bio crude phase. Since, aqueous phase is the largest fraction of HTL processing, therefore its necessary to utilize and optimize it in an appropriate way. This study deals with the characterization and optimization of role of aqueous phase in HTL processing. Different analytical techniques can used to characterize the aqueous phase like for volatiles ones (GC-MS), for non-volatiles and heavier hydrocarbons (HPLC), inorganics by Inductively Coupled Plasma Optical Emission Spectrometer, (ICP-OES). This characterization of aqueous phase will describe that whether aqueous phase is reliable for recirculation in terms of increasing the yield and quality of bio-crude, simultaneously recirculation reduces the process temperature, which results to make it cost effective. The characterization will also enable us to assess the potential of aqueous phase for reclamation of biomass. Moreover, the recycling of nutrient rich aqueous phase could be beneficial for the cultivation of biomass, which would reduce the cost of fertilizers. The large amount of COD present in aqueous phase make it more suitable for the production of syngas through the process of gasification.


Publications in journals and conference papers may be found at VBN.