Swellable Organically Modified Silica (SOMS) As a Catalyst Scaffold for Catalytic Treatment of Water through Hydrogenation and Hydrogenolysis Reactions

Ozkan, Umit S.
Ailawar, Saurabh A.
Hunoor, Anagha
Çelik, Gökhan
Gunduz, Seval
Miller, Jeffrey T.
Tao, Franklin Feng
Edmiston, Paul L.
Ground water contamination by halogenated hydrocarbons or by aromatics is a growing concern. Existing technologies such as adsorption or air stripping suffer from incomplete degradation of the contaminants or their transfer from one medium to another such as water-to-land or water-to-air. In this study, we are investigating the catalytic conversion of these contaminants through catalytic hyrdogenolysis or hydrogenation reactions. What is unique about this study is that we are using a novel material, swellable organically modified silica (SOMS) as a catalyst scaffold for the active metals. SOMS, which is very hydrophobic and has a high affinity for organics, allows the concentration of the contaminants in the vicinity of the active sites, hence helping the activity. It also repels anions which act catalyst poisons (chlorides, sulfates, nitrates), hence helping the catalyst stability. Characterization experiments were performed under ex-situ and in-situ conditions using techniques such as extended X-ray absorption fine structure (EXAFS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), high angle annular dark field (HAADF) scanning transmission electron microscopy (STEM), energy-dispersive X-ray analysis (EDAX), inductively coupled plasma optical emission spectrometry (ICP-OES), mass spectrometry, and laser Raman spectroscopy. Kinetic results from a batch reactor will also be presented.
2019 AIChE Annual Meeting, (10 - 15 Kasım 2019)


Optimal design and operation of land-treatment systems for petroleum hydrocarbons
Kivanc, S; Ünlü, Kahraman (1999-04-22)
Land treatment technology has been extensively used for the disposal of petroleum hydrocarbon containing wastes. Effective management of land treatment systems requires optimum design and operation of the system in order to achieve the fastest and most complete degradation of petroleum hydrocarbons without contamination of the environment. This paper describes a model that can be used for optimal design and operation of land treatment systems for petroleum hydrocarbon containing wastes. The model is compose...
Graphene oxide/magnesium oxide nanocomposite: A novel catalyst for ozonation of phenol from wastewater
Heidarizad, Mahdi; Şengör, Sema Sevinç (2017-01-01)
Catalytic ozonation is a promising advanced oxidation technique for the removal of contaminants from water and wastewater. Graphene oxide (GO) is an oxidized derivative of graphene which contains epoxide, hydroxyl, and carboxyl groups with high surface area, and is being recently used for effective adsorption of pollutants in aquatic environments. In our previous work, we modified GO with magnesium oxide (MgO) and demonstrated the high-rate adsorption of methylene blue (MB) by the synthesized nanocomposite ...
Immobilization of Pb and Cu by organic and inorganic amendments in contaminated soil
Rizwan, Muhammad Shahid; Imtiaz, Muhammad; Zhu, Jun; Yousaf, Balal; Hussain, Mubshar; Ali, Liaqat; Ditta, Allah; Ihsan, M. Zahid; Huang, Guoyong; Ashraf, Muhammad; Hu, Hongqing (2021-03-01)
Soil contamination with heavy metals has become a global environmental-health concern. A series of greenhouse experiments were conducted to investigate the effects of rice straw, rice straw derived biochar (BC), multi-walled carbon nanotubes, and single superphosphate (SSP) on immobilization of Pb and Cu via sequential extraction of BCR, total characteristics leaching procedure (TCLP), and metals phytoavailability to rapeseed in Pb and Cu spiked soil. Moreover, the residual effect of applied soil amendments...
Estimation of capillary pressure parameter from total petroleum hydrocarbon measurements in contaminated soils Kilcal basinç parametresinin kirlenmiş topraklardaki toplam petrol hidrokarbonu ölçümlerinden tahmin edilmesi
Ünlü, Kahraman (1995-10-01)
Groundwater contamination from hydrocarbon spills or leaks is a widespread problem. When the volume of released product is small and/or the depth to groundwater is sufficiently great, all of the nonaqueous phase liquid (NAPL) may be retained in an immobile condition in the unsaturated zone by capillary forces. For larger spill volumes or shallower water tables, NAPL may reach the groundwater where it will spread laterally if its density is less than water. Such light NAPL include most crude oils and refined...
Modeling water quality impacts of petroleum contaminated soils in a reservoir catchment
Ünlü, Kahraman (2000-05-01)
Soil contamination due to spills or leaks of crude oils and refined hydrocarbons is a common problem. Estimation of spill volume is a crucial issue in order to determine the expected contaminating life span of contaminated soils. The direct procedure to determine the amount of hydrocarbon in soil is to measure the concentration of total petroleum hydrocarbon (TPH) in soil samples. The primary objective of this study was to assess the potential effects of oil contaminated soils on the water quality of Devege...
Citation Formats
U. S. Ozkan et al., “Swellable Organically Modified Silica (SOMS) As a Catalyst Scaffold for Catalytic Treatment of Water through Hydrogenation and Hydrogenolysis Reactions,” presented at the 2019 AIChE Annual Meeting, (10 - 15 Kasım 2019), Orlando, FL, 2019, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/85224.