Engineering Commons^™

Upgrading Of Vapors And Gases From Pyrolysis To Valued Added Gaseous Products, Ivan Santiago

Electronic Thesis and Dissertation Repository

This MSc thesis explores biomass pyrolysis and reforming, aiming to convert biomass-derived vapors into useful gases for synthesis and fuel. The study focuses on transforming high molecular weight molecules, like polycyclic aromatic hydrocarbons, and volatile organic molecules such as acids, alcohols, and other substances formed during pyrolysis into essential gases like hydrogen, methane, carbon monoxide, and carbon dioxide.

A dual-reactor system is employed: a CSTR for primary pyrolysis, followed by a PFR or PBR for secondary catalytic processing. Olivine is used as the catalyst.

The research compares three gas upgrading methods: thermal cracking, catalytic cracking, and catalytic steaming (reforming).

Results …

Scale-Up And Measurement Enhancements Of A Biogenerator Bioreactor, Jason J. Glas

Electronic Thesis and Dissertation Repository

Renewable energies in the form of wind and solar have seen steadfast growth across the world, however the abundance of these technologies that demonstrate short-term variability in power output threatens power grid stability and necessitates the use of fossil fuels for rapid throttling capability. A requirement for large scale energy storage systems becomes necessary and a system based on hydrogen generation, storage, and consumption for electrical grid supply-demand stabilization using a ferric sulfate oxidant is herein explored, named the BioGenerator. As the name implies, the system functions as an indirect microbial fuel cell using a biologically active broth dominated by …

Design Of Active Pharmaceutical Ingredients Solid States In Crystallization Processes, Weizhong Gong

Electronic Thesis and Dissertation Repository

Crystallization is an important technique to obtain solid-state drugs from solutions. Physicochemical properties of the active pharmaceutical ingredients (APIs) are determined by crystallization. More than half of the active pharmaceutical ingredients exhibit polymorphism, the phenomenon of chemical species showing more than one unit-cell structure in the solid state. Controlling polymorphism is one of the most important goals during pharmaceutical manufacturing. Nevertheless, the control of polymorphism is sometimes not enough to realize the targeted physicochemical properties. Suitable additives (coformers/salt formers) are explored to generate new multi-component solid phases of poorly soluble/bioavailable active pharmaceutical ingredients (APIs). The design of pharmaceutical cocrystals and …