pioneer co2 recovery system

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In this mode, using a recycle blower (15), a recirculating stream using of CO2 gas is used to heat the sorbent to a temperature greater than about 200 C. in order to release sorbed CO2. 2004-2022 FreePatentsOnline.com. Commercial refrigerators, The final step in the first method includes cooling of the absorbent bed after regeneration by hot CO2. After absorption of CO2, the absorbent is heated in a recirculating flow of CO2 such that the temperature of the absorbent can be increased from approximately 97 C. to about 200C, at which temperature CO2 is released from the absorbent. An infrared CO2 sensor was located on a slipstream off an exhaust flow meter and dry test meter. CO2 Recovery Systems, The calculation assumes an absorbent heat capacity of 1.07 kJ/kg-C. The results (FIGS. CO2 Recovery Systems, 13) and then cooled quickly to ready for another cycle (FIG. One stainless steel reactor was used for the four steps consisting of sorption, regeneration by water addition, water removal, and cooling by switching valves between each step. information below. Next, dry nitrogen was used at a rate of about 88 standard liters per minute to heat the absorbent to desorb water in preparation for the next cycle. If such combustion gas exhaust at 1600 C. were cooled by transfer of heat to the absorbent bed to 300 C., sufficient heat would be generated to satisfy the thermal energy requirements for the H2O regeneration procedure. The gas composition sensor and gas chromatograph used for calculations were also commercially available. Lastly, nitrogen at a flow rate of 100 liters per minute was used to cool the sorption bed, readying it for another cycle. Micro-winery systems, Pioneer Energy offers the opportunity for craft brewers to join the ranks of the nation's major breweries in recovering their fermentation CO2, Supplier of: )\6B}44Sc^&czb^kgs>Eo)wR,O^^1=Mc_c('S?YX.CNs 1 uses a conventional stationary internal combustion engine (4), gas turbine (5), other combustion system, or other type of CO2 emitter operating on a wide range of gaseous, liquid, or solid fuels is used to power an electrical generator (6) to generate electrical power (7) or is used for other purposes. The process was stopped when the bottom of the reactor reached 200 C. The next chart (FIG. Each absorbent bed contains 1930 kilograms of sorbent to accommodate the specified six minute cycle time. H\@}&=4hRbzO}~M! There is 100 percent captured for the first six minutes at which time the carbon dioxide begins to breakthrough and can be detected by the infrared sensor. 12) and then can be regenerated with pre-heated carbon dioxide (FIG. Alternatively, this gas may be used as a recirculating cooling gas (6, 10) in vessel (4) according to the procedures outlined previously. However, because molecular sieves, activated carbon, and other CO2 sorbents have a stronger affinity for H2O than for CO2, H2O can be used to displace CO2 that was recovered on absorbents as an alternative to thermal regeneration. CO2 Recovery Systems, Water addition to a sorbent bed releases nearly pure CO2 as H2O displaces sorbed CO2. 1 Process flow diagram of sorption/hot CO2 regeneration system, FIG. CO2 (21) is collected from the sorbent regeneration system as a concentrated product. The ideal case would require a ratio of 18 grams of water per 44 grams of carbon dioxide to be released. f%Y`V2+ Minor amounts of excess oxygen and part-per-million levels of combustion byproducts such as carbon monoxide, nitrogen oxides, and sulfur oxides are also present in the exhaust gases. CIP systems, Scouting Experiments: A series of experiments was run to establish procedures and preliminary results of the effectiveness of using liquid water and steam to displace the CO2 sorbed onto molecular sieve 5A. The CO2 released upon H2O addition is nearly pure, with only small amounts of nitrogen, oxygen, and other trace gases present from interstitial spaces between sorbent particles or released from sorbent upon water addition. After removing water, the resulting dry exhaust gas would contain 11.73 volume % CO2 and 88.27 volume % N2.

The combustion source exhaust (18) contains sufficient heat to satisfy the thermal requirements to raise the sorbent in vessel (2) to greater than 200 C. (including the heat of desorption of CO2 and the heating of the sorption media). CO2 Recovery Systems, Roughly similar results would be obtained with natural gas or other hydrocarbon fuels. Results from these subsequent cycles are summarized below. FIG. The flow to the infrared sensor was controlled using a rotameters set to 0.5 liters per minute. and 4) shows the results of the regeneration process.

%PDF-1.6 % This is a member-only area. Experiment 5: For this experiment carbon dioxide was sorbed onto a molecular sieve at a flow rate of 50 liters per minute. H2O (5) is added in the form of steam or liquid water to displace CO2. 2. The second chart (FIG. and The dimension of the cylindrical reactor was ten inches tall by three inches diameter. In this method, a four-bed system is employed rather than the three-bed system described above for the first method. Sorption of CO2 results in a temperature rise in vessel (1). & Terms of Use. Members gain access to exclusive content by the Sustainability Initiative. Operating cycle times for absorption, regeneration, water removal, and cooling are identical so that the combustion source or turbine exhaust gases are always directed to one of the four vessels while in CO2 sorption mode. This chart shows the volume percent carbon dioxide in the exhaust taking into account the amount of CO2 used to regenerate the sorbent bed. This property is exploited to boost the mobility of oil through geologic formations, resulting in significantly improved oil recovery at production wellbore. The additional heat input can be provided by combustion of some additional amount of fuel using the high-temperature exhaust from such combustion to supplement the heat available from the primary combustion exhaust. A flow rate of 500,000 standard cubic feet per day (SCFD), or 14,158,000 standard liters per day (SLPD), or 9832 standard liters per minute (SLPM), or 19.3 kilograms per minute of CO2 produced from a combustion source was used for the thermal analysis presented below. The air can be introduced as a one-pass flow or as a recirculating flow with cooling after each pass. This is equivalent to 1206 kW of thermal power over the six minute cycle time. However, approximately 80 percent of the water injected as steam was recovered as condensate in this experiment. | For simplicity, the combustion source was considered to be pure methane. Blast chillers, =BOS)N)kMf=z Ae Commercial refrigerators, A cycle time of six minutes is specified for each step (CO2 sorption, CO2 regeneration, and absorbent cooling) to capture an amount of CO2 equal to 6 weight percent of the absorbent present. A heat exchanger (10) is used to further cool combustion gases prior to moisture removal. Pioneer Energys CO2 Craft Brewery Recovery System can recapture about five tons of carbon dioxide per month, enough for a brewery that generates up to about 60,000 barrels per year, and units can be stacked to increase that capacity. Transfer pumps, National Refrigeration Products (NRP), located in Langhorne, PA, is a leading manufacturer of refrigerant recovery and recycling equipment, including small portable units and large industrial/commercial machines. H\@y>AGw~>@LZ7bt;fu1rvYQhUi~y/ri:n.&mw Another blower (15) is used to recycle CO2-rich gas recycled to vessel (2) for the purpose of hot CO2 gas recovery and sorbent regeneration. Commercial freezers, The example case uses 36 grams of water per 44 grams of carbon dioxide. FIG. With continued use of fossil fuels, capturing carbon dioxide emissions directly from the source of combustion could reduce its effect on our planet and its inhabitants. The following procedures may be employed for the recovery of carbon dioxide from internal combustion engines, gas turbines, or other combustion sources used as described in the present invention. 5) shows the results of the cooling process. In one embodiment the carbon dioxide source is flue gas. Privacy Policy As a result, there is interest in capturing and sequestering the carbon dioxide produced by combustion systems. The cooling air is exhausted (10) to atmosphere. The cooling air should be of low humidity to prevent absorption of H2O that could reduce the absorbent capacity for CO2 during the next sorption cycle. Industrial uses include enhanced oil recovery (EOR), welding, chemical feedstock, inert gas, firefighting, and solvent extracting as a supercritical fluid. The dark grey shows the mass percent loading of CO2 on the molecular sieve during the sorption process. In summary, the thermal analysis for the first method for CO2 capture shows that sufficient energy is available to perform the required hot CO2 regeneration method. XpVGmkm o]RJyTgu(idA:+!WA%!C^$(mbr~%d89xt1)TxI{G- l2iBIvp&dE$m/!#g>M?S{nH-|`'R+`'ex!v5%v5?slACG__Z6%DD#YZ/I/|n!L 7,hu#:g9I~H' `; endstream endobj 152 0 obj <>stream Glycol chillers, Dobbins is a distributor for all major brands of sanitary food and pharma processing equipment. Again, the results show that the sorbent bed can capture the carbon dioxide (FIG. The temperature of the recirculating CO2 is raised using heat indirectly recovered from the combustion source in a heat exchanger (8). Note also that any CO2 remaining in the exhaust gas after absorption of CO2 will be sorbed during the cooling step, thereby enabling nearly complete capture of CO2 from the exhaust source. Natural gas or other fuel (16) is burned in combustion device (4) by air (17), producing hot combustion gas (18). In addition, carbon dioxide is the leading cause of global warming and its reduction in the air is important to reducing greenhouse gas effects on water levels and global temperatures. Members of the Sustainability Initiative receive the following benefits: If you are interested in becoming a Sustainability Initiative member, please fill out the form below and we 2 illustrates the sorption of CO2 and the subsequent recovery of nearly pure CO2 using a water or steam regeneration method. Optionally, a desiccant drying bed can be installed after the heat exchanger/cooler and inlet of vessel (1). The entire disclosures of all documents cited throughout this application are incorporated herein by reference. Note that further chilling of the recirculating gas will reduce the recycling gas rate. The procedures and results for the CO2 sorption were similar to those for Experiment 1 of the First Method described above. f%k5r\c!k5{hr\c6ri{3f7GoN~w;N~w;N~@V9+e:d To cool a 1930 kg sorbent bed from 200 C. to 40 C. requires 330,416 kJ of heat removal, equivalent to 917.8 kW of thermal energy removal. It is also a critical component of medical oxygen, where in low concentrations it acts a breathing stimulant. At this temperature, water vapor contained in the combustion source exhaust is not further absorbed. For this experiment the sorption process (FIG.

Air is passed through a fourth vessel (4) to cool the sorbent prior to initiating the next process cycle. Reactor system set-up: To simulate the entire system, dry carbon dioxide blended with nitrogen from pressurized cylinders was used instead of combustion source exhaust. Hot engine exhaust (9) is used to heat sorbent for removal of water that is cooled (15), collected in a reservoir (13), and then in part recovered and recycled (5) as feed to vessel (2) for displacement and recovery of CO2 product (8). The regeneration process stayed at 50 liters per minute and the regeneration and cooling flow rates were approximately 130 liters per minute which more closely matched the cycle time of the regeneration process. The direction of flow was upward to remove the heat quickly and was stopped when the top of the reactor was below 50 C. Also shown in the chart is the volume percent CO2, which shows a small amount of carbon dioxide only within the first 20 seconds indicating nearly complete recovery of CO2 during regeneration. Welders, The CO2 sensor was used to verify the sorption inlet and exhaust gas compositions from the sorption, regeneration, and cooling steps.

Water or preferably steam (5) is used to recover carbon dioxide (8) sorbed from the combustion source exhaust rather than hot CO2 as in the first method. Sanitizing Chemicals, 2 Process flow diagram of sorption/H2O regeneration system, FIG. 1 illustrates the sorption of CO2 and the subsequent recovery of nearly pure CO2 with simultaneous regeneration of the sorbent material using a hot CO2 regeneration method. 1 shows an upflow configuration, although the flow direction is not critical to the invention. This temperature is calculated from the adiabatic temperature rise of sorbent resulting from the release of 44.9 kiloJoules (kJ) of energy per mole (44 grams) of CO2 sorbed. For the example case described here, an amount of water equal to twice the ideal one molecule of water per molecule of carbon dioxide is injected as steam. The engine or turbine uses air to combust the fuel, resulting in exhaust gas consisting mostly of nitrogen, carbon dioxide, and water vapor. The operating cycle time is not critical to the invention, but is selected on the basis of the exhaust gas composition and flow rate with consideration for minimizing vessel sizes. Carbonation units. Optimization of the absorbent selection, vessel configuration, cycle time, and other parameters would likely lead to reduced supplemental thermal energy input requirements for the H2O regeneration method. 7 Experiment 2: Regeneration Results, FIG. During regeneration of CO2 by H2O, heat will be generated by H2O sorption onto the sorbent. 10) and cooling (FIG. Novel methods for capturing carbon dioxide from internal combustion engines, gas turbines, and other combustion sources operating on a wide range of gaseous, liquid, or solid fuels are described. Following the procedures outlined above, dry ambient temperature nitrogen was used to cool the absorbent in preparation for another CO2 sorption cycle. The engine or turbine exhaust gas passes through a series of three identical vessels for water removal (3), CO2 sorption (1), and CO2 recovery (2). In the black is the cumulative percent CO2 fed that is captured by the sorbent bed. During the steam injection step, the absorbent bed temperature rose from about 50 C. to as high as about 250 C. due to heat of sorption of water vapor. Alternatively, some of the exhaust gas heat can be stored in a heat storage medium prior to transfer to the recirculating CO2 stream.

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pioneer co2 recovery system