Chemical Degradation of Polyacrylamide during Hydraulic
Degradation of drag reducer polyacrylamide under high volume hydraulic fracturing (HVHF) conditions alters its polymer size, distribution and chemical composition, potentially affecting the
Degradation of drag reducer polyacrylamide under high volume hydraulic fracturing (HVHF) conditions alters its polymer size, distribution and chemical composition, potentially affecting the toxicity and treatability of the resulting wastewater. This study focused on a non-chemical pathway-mechanical degradation of polyacrylamide under ultra-high fluid strain conditions (∼10 7 s −1) that uniquely exist during HVHF but has not yet been explored experimentally.
Chemical Degradation of Polyacrylamide during Hydraulic
Polyacrylamide (PAM) based friction reducers are a primary ingredient of slickwater hydraulic fracturing fluids. Little is known regarding the fate of these polymers under downhole conditions, which could have important environmental impacts including decisions on strategies for reuse or treatment of flowback water.
The shale sample adsorbed some PAM (∼30%), but importantly it catalyzed the chemical degradation of PAM, likely due to dissolution of Fe2+ at low pH. These results provide the first evidence of radical-induced degradation of PAM under HPT hydraulic fracturing conditions without additional oxidative breaker.
Mechanical degradation of polyacrylamide at ultra high
Degradation of drag reducer polyacrylamide under high volume hydraulic fracturing (HVHF) conditions alters its polymer size, distribution and chemical composition, potentially affecting the toxicity and treatability of the resulting wastewater. This study focused on a non-chemical pathway-mechanical degradation of polyacrylamide under ultra-high fluid strain conditions (∼107s−1) that uniquely exist during HVHF but has not yet been explored experimentally.
High-volume hydraulic fracturing (HVHF) consumes a wide range of proprietary chemicals and large amounts of water. The returned wastewater, named flowback and produced water, have shown to contain high concentrations of geogenic inorganic species, and some organic chemicals that identical to the original or to the transformed injected chemicals. However, the fate and transformation of many of
Mechanical Degradation of Polyacrylamide at Ultra
Degradation of drag reducer polyacrylamide under high volume hydraulic fracturing (HVHF) conditions alters its polymer size, distribution and chemical composition, potentially affecting the
2.2. Synthetic flowback water. Synthetic flowback water was obtained by reacting the synthetic fracturing fluid with 25 g/L shale at 80 ℃ and 83 bar for 24 h simulating downhole conditions encountered in natural gas reservoirs. The variation in these conditions across different gas formations can be large , and its impact on polyacrylamide degradation was investigated previously.
POLYACRYLAMIDE DEGRADATION DURING HYDRAULIC FRACTURING
In addition, my PhD work extends the main work on chemical degradation to quantify the mechanical degradation of polyacrylamide using a high-pressure capillary flow set up. The experimental setup simulates the high strain rates similar to that at the entrance flow through small pores and fractures in the formation face during the fracture
Polyacrylamide degradation during hydraulic fracturing in the deep subsurface Boya Xiong, Ph.D. The Pennsylvania State University Postdoctoral Associate, MIT The use of non-toxic drag reducing polyacrylamide (~107 Da) as a friction reducer in water intensive hydraulic fracturing has made massive gas extraction possible in shale plays nationwide and globally. Yet insufficient attention has been
Shear degradation of water‐soluble polymers. I
Boya Xiong, Prakash Purswani, Taylor Pawlik, Laxmicharan Samineni, Zuleima T. Karpyn, Andrew L. Zydney, Manish Kumar, Mechanical degradation of polyacrylamide at ultra high deformation rates during hydraulic fracturing, Environmental Science: Water Research & Technology, 10.1039/C9EW00530G, (2025).
Polyacrylamide degradation and its implications in environmental systems. J. Hydraulic Fracturing Chemicals and Fluids B. et al. Chemical degradation of polyacrylamide during hydraulic frac-
- What is P 1960 (Otto) polyacrylamide?
- P 1960 (OTTO) Polyacrylamide Cas 9003-05-8 - used as a water soluble homopolymer which is biocompatible. P 1960 (OTTO) Polyacrylamide Cas 9003-05-8 - used in such applications as polyacrylamide gel electrophoresis, and can also be called ghost crystals when cross-linked, and in manufacturing soft contact lenses.
- Does chemsrc provide polyacrylamide MSDS?
- Chemsrc provides Polyacrylamide (CAS#:9003-05-8) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of Polyacrylamide are included as well.
- Is polyacrylamide a water soluble homopolymer?
- Polyacrylamide (PAM) is a polymer (-CH2CHCONH2-) formed from acrylamide subunits. P 1960 (OTTO) Polyacrylamide Cas 9003-05-8 - used as a water soluble homopolymer which is biocompatible.
- Do pressure-driven flows of high molecular weight polyacrylamide solutions decrease?
- Pressure-driven flows of high molecular weight polyacrylamide solutions are examined in nanoslits using fluorescence photobleaching. The effective viscosity of polymer solutions decreases when the channel height decreases below the micron scale. In addition, the apparent slippage of the solutions is
