A5067024125- Thermochemical Biomass Conversion Processes
- Vehicle emissions and performance
- Biodiesel Production and Applications
- Advanced Combustion Engine Technologies
- Lignin and Wood Chemistry
- Catalytic Processes in Materials Science
- Biofuel production and bioconversion
- Catalysis and Hydrodesulfurization Studies
- Algal biology and biofuel production
- Catalysts for Methane Reforming
- Air Quality and Health Impacts
- Subcritical and Supercritical Water Processes
- Coal Combustion and Slurry Processing
- Photovoltaic Systems and Sustainability
- Synthesis and characterization of novel inorganic/organometallic compounds
- Environmental Impact and Sustainability
- Bioenergy crop production and management
- Agriculture Sustainability and Environmental Impact
- Energy and Environment Impacts
- Carbon Dioxide Capture Technologies
- Water-Energy-Food Nexus Studies
- Atmospheric chemistry and aerosols
- Inorganic and Organometallic Chemistry
- Catalysis for Biomass Conversion
- Thermal and Kinetic Analysis
Desert Research Institute
2013-2022
Gas Technology Institute
2014
Chevron (Netherlands)
1984-1998
Chevron (China)
1990-1996
Chevron (United States)
1986-1993
Iowa State University
1979-1980
Hydrothermal carbonization (HTC) of biomass involves contacting raw feedstock with hot, pressurized water. Through a variety hydrolysis, dehydration, and decarboxylation processes, gaseous water-soluble products are produced, in addition to water itself solid char. In this experimental effort, 2 L Parr stirred pressure vessel was used apply the HTC process mixed wood feedstock. The effects reaction conditions on product compositions yields were examined by varying temperature over range...
Hydrothermal carbonization (HTC) is a promising upgrading process to convert various low energy‐density lignocellulosic biomass materials homogeneous, energy‐dense HTC biochar, known as hydrochar. A novel two‐chamber reactor was designed and built investigate the effects of reaction parameters on resulting hydrochar produced from woody biomass. Reaction investigated included temperature (200–230°C), feedstock particle size (0.60–2.38 mm), time (1–5 min). Mass yield higher heating value (HHV)...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpeciated Measurements and Calculated Reactivities of Vehicle Exhaust Emissions from Conventional Reformulated GasolinesS. Kent HoekmanCite this: Environ. Sci. Technol. 1992, 26, 6, 1206–1216Publication Date (Print):June 1, 1992Publication History Published online25 July 2002Published inissue 1 June 1992https://pubs.acs.org/doi/10.1021/es50002a610https://doi.org/10.1021/es50002a610research-articleACS PublicationsRequest reuse permissionsArticle...
The effects of fuel composition on diesel exhaust particulate emissions have been studied at several steady-state operating conditions using a heavy-duty laboratory engine. Particulate were influenced by three primary factors: sulfur content, aromatics and volatility. At all but lightly loaded conditions, was the dominant factor in formation. Fuel affects primarily formation sulfate (as sulfuric acid) associated bound water and, to lesser degree, increasing amount soluble organic material...
Microalgae have tremendous potential as a feedstock for production of liquid biofuels, particularly biodiesel fuel via transesterification algal lipids. However, results in significant amounts residues, or “lipid extracted algae” (LEA). Suitable utilization the LEA residue will improve economics biodiesel. In present study, we evaluate hydrothermal carbonization (HTC) whole and lipid (Spirulina maxima) feedstocks order to produce solid biofuel (hydrochar) value-added co-products aqueous...
Herein, we have developed a simple and effective strategy for in situ preparation of nanoscale zerovalent iron (NZVI) supported on porous carbon (PC) using renewable hydrochar as the precursor. Physicochemical properties resultant NZVI/PC composites were characterized by XRD, SEM-EDS, TEM, BET, effectiveness these was evaluated remediation PCB-contaminated water. Results showed that ions uniformly dispersed within matrix serve an activation agent during subsequent pyrolysis process. The is...
Oleaginous microorganisms are attractive feedstock for production of liquid biofuels. Direct hydrothermal liquefaction (HTL) is an efficient route that converts whole, wet biomass into energy-dense fuel precursor, called 'biocrude'. HTL represents a promising alternative to conventional lipid extraction methods as it does not require dry or additional steps extraction. However, high operating pressure in can pose challenges reactor sizing and overall costs. Through the use co-solvents be...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBis(trimethylsilyl)-, trimethylsilyltrimethylgermyl-, and bis(trimethylgermyl)diazomethane. Synthesis chemistry of quantitative silene germene precursorsThomas J. Barton S. Kent HoekmanCite this: Am. Chem. Soc. 1980, 102, 5, 1584–1591Publication Date (Print):February 1, 1980Publication History Published online1 May 2002Published inissue 1 February 1980https://pubs.acs.org/doi/10.1021/ja00525a020https://doi.org/10.1021/ja00525a020research-articleACS...