Multiphase, Microdispersion Reactor for the Continuous Production of Methane Gas Hydrate

Abstract

A continuous-jet hydrate reactor originally developed to generate a CO2 hydrate stream has been modified to continuously produce CH4 hydrate. The reactor has been tested in the Seafloor Process Simulator (SPS), a 72-L pressure vessel available at Oak Ridge National Laboratory. During experiments, the reactor was submerged in water inside the SPS and received water from the surrounding through a submersible pump and CH4 externally through a gas booster pump. Thermodynamic conditions in the hydrate stability regime were employed in the experiments. The reactor produced a continuous stream of CH4 hydrate, and based on pressure values and amount of gas injected, the conversion of gas to hydrate was estimated. A conversion of up to 70% was achieved using this reactor.

Continuous Formation Process of CO2 Gas Hydrate via a Vortex and Impinging Stream Reactor

“…According to the paper reported by Taboada-Serrano et al, the experimental uncertainties were analyzed. 42 In the experiment, the error margins of the CO 2 gas hydrate formation rate γ CO 2 were about 0.7% and came from the accuracies of the temperature sensors, pressure transducers, and volumetric flow transducers, which were 0.1, 0.1, and 0.15%, respectively.…”

“…It was shown that the Higee factor β could affect the CO 2 gas hydrate formation rate and the mechanism functions supplied by the VIR could promote the CO 2 gas hydrate formation under the experimental conditions. According to the paper reported by Taboada-Serrano et al, the experimental uncertainties were analyzed . In the experiment, the error margins of the CO 2 gas hydrate formation rate γ CO 2 were about 0.7% and came from the accuracies of the temperature sensors, pressure transducers, and volumetric flow transducers, which were 0.1, 0.1, and 0.15%, respectively.…”

Modular Chemical Process Intensification: A Review

“…A continuous-jet hydrate reactor (CJHR) developed at the Oak Ridge National Laboratory (ORNL) is another example of a multifunctional reactor (37)(38)(39)(40)(41)(42)(43). The CJHR combines a co-flow injector/reactor to convert carbon dioxide (gas or liquid) or methane (gas) and water into gas hydrates (Figure 2).…”

Pilot-Scale Experimental Investigation of Multifield Coupling and Heterogeneity during Hydrate Dissociation

“…This tool can accurately measure parameters such as the fluid volume, sound wave characteristics, resistance characteristics, temperature, pressure, shear strength, and permeability . The Oak Ridge National Laboratory (ORNL) established the Seafloor Process Simulator (SPS) with a volume of 72 L to investigate the formation and decomposition processes of gas hydrates, which includes several measuring units such as digital cameras, thermocouples, pressure transducers, and gas flow meters. − In Germany, the natural gas hydrate research program SUGAR established a large-scale natural gas hydrate extraction simulator (LARS, 425L), which can perform in situ catalytic combustion thermal stimulation of hydrate extraction and CO 2 replacement. It can measure the temperature, resistivity, gas-phase composition, and other parameters .…”