SYSTEMS AND METHODS OF RENEWABLE NATURAL GAS PROCESSING
Example gas recovery systems include a source gas conditioning assembly configured to condition and compress the inlet source gas to provide a conditioned source gas, a first membrane assembly configured to separate the conditioned source gas into a hydrocarbon enriched stream and a recovery stream, a second membrane assembly fluidly coupled to the hydrocarbon enriched stream, and configured to separate the hydrocarbon enriched stream into a hydrocarbon product stream and a recycle stream, a carbon dioxide (CO 2 ) plant assembly fluidly coupled to the recovery stream configured to provide a carbon dioxide product stream and an enriched recycle stream, a standalone membrane assembly configured to separate the enriched recycle stream into a hydrocarbon enriched recycle stream and an effluent stream, and wherein the source gas conditioning assembly is fluidly coupled to the recycle stream and the hydrocarbon enriched recycle stream.
1 .- 19 . (canceled)
20 . A gas recovery system, comprising:
a source gas conditioning assembly fluidly coupled to an inlet source gas, and configured to condition and compress the inlet source gas to provide a conditioned source gas;
a first membrane assembly fluidly coupled to the conditioned source gas, and configured to separate the conditioned source gas into a hydrocarbon enriched stream and a recovery stream;
a second membrane assembly fluidly coupled to the hydrocarbon enriched stream, and configured to separate the hydrocarbon enriched stream into a hydrocarbon product stream and a recycle stream;
a carbon dioxide (CO 2 ) plant assembly fluidly coupled to the recovery stream, and configured to provide a carbon dioxide product stream and an enriched recycle stream;
a standalone membrane assembly fluidly coupled to the enriched recycle stream, and configured to separate the enriched recycle stream into a hydrocarbon enriched recycle stream and a secondary recovery stream;
an energy recovery assembly fluidly coupled to the hydrocarbon enriched recycle stream and configured to extract energy therefrom;
wherein the source gas conditioning assembly is fluidly coupled to the recycle stream; and
wherein the CO 2 plant assembly is fluidly coupled to the secondary recovery stream.
21 . The system of claim 20 , wherein the energy recovery assembly comprises a burner.
22 . The system of claim 20 , wherein the energy recovery assembly comprises a fuel cell.
23 . The system of claim 20 , wherein the energy recovery assembly comprises a generator.
24 . An apparatus, comprising:
a standalone membrane assembly configured to:
receive a treated waste gas stream, the treated waste gas stream comprising a purge stream of a CO 2 plant;
separate the treated waste gas stream into a hydrocarbon enriched stream and a secondary recovery stream;
provide the hydrocarbon enriched stream to one of an energy recovery assembly or a primary methane separation assembly; and
provide the secondary recovery stream to the CO 2 plant.
25 .- 55 . (canceled)
56 . The system of claim 20 , wherein the CO 2 assembly comprises a liquefaction component.
57 . The system of claim 20 , wherein the enriched recycle stream comprises non-condensable gases from the CO 2 plant assembly.
58 . The system of claim 57 , wherein the enriched recycle stream passes directly from the CO 2 plant assembly to the standalone membrane assembly without being pressurized.
59 . A gas recovery system, comprising:
a source gas conditioning assembly fluidly coupled to an inlet source gas, and configured to condition and compress the inlet source gas to provide a conditioned source gas;
a first membrane assembly fluidly coupled to the conditioned source gas, and configured to separate the conditioned source gas into a hydrocarbon enriched stream and a recycle stream;
a second membrane assembly fluidly coupled to the hydrocarbon enriched stream, and configured to separate the hydrocarbon enriched stream into a hydrocarbon product stream and a recovery stream;
a carbon dioxide (CO 2 ) plant assembly fluidly coupled to the recovery stream, and configured to provide a carbon dioxide product stream and an enriched recycle stream;
a standalone membrane assembly fluidly coupled to the enriched recycle stream, and configured to separate the enriched recycle stream into a hydrocarbon enriched recycle stream and a secondary recovery stream;
an energy recovery assembly fluidly coupled to the hydrocarbon enriched recycle stream and configured to extract energy therefrom;
wherein the source gas conditioning assembly is fluidly coupled to the recycle stream; and
wherein the CO 2 plant assembly is fluidly coupled to the secondary recovery stream.
60 . The system of claim 59 , wherein the energy recovery assembly comprises a burner.
61 . The system of claim 59 , wherein the energy recovery assembly comprises a fuel cell.
62 . The system of claim 59 , wherein the energy recovery assembly comprises a generator.
63 . The system of claim 59 , wherein the enriched recycle stream comprises non-condensable gases from the CO 2 plant assembly.
64 . The system of claim 63 , wherein the enriched recycle stream passes directly from the CO 2 plant assembly to the standalone membrane assembly without being pressurized.
65 . The apparatus of claim 24 , wherein the purge stream comprises non-condensable gases from the CO 2 plant assembly.
66 . The apparatus of claim 24 , wherein the purge stream passes directly from the CO 2 plant assembly to the standalone membrane assembly without being pressurized.
67 . The apparatus of claim 24 , wherein the CO 2 plant assembly comprises:
a carbon adsorption bed;
a gas compression component;
a gas dehydration component; and
a liquefaction component.
68 . The apparatus of claim 24 , further comprising:
wherein the standalone membrane assembly is configured to provide the hydrocarbon enriched stream to the primary methane separation assembly; and
wherein the primary methane separation assembly comprises a membrane based separation assembly.
69 . The apparatus of claim 68 , wherein the membrane based separation assembly comprises a two-membrane assembly.
70 . The apparatus of claim 68 , wherein the membrane based separation assembly comprises a three-membrane assembly.