{
  "authors": [],
  "basis": {
    "capacity": "100 MMscf/d raw gas (dry basis, 60 degF, 14.696 psia) = 96.7 t/h; 68.7 t/h sales gas (83.7 MMscf/d) and 27.3 t/h C2+ NGL (ASSUMED capacity)",
    "location": "generic US onshore shale gas area (Barnett-type), not chosen",
    "operating_hours_per_year": 8000
  },
  "benchmarks": [],
  "chemistry": {
    "inputs": [
      {
        "chemical": "raw-natural-gas",
        "grade": null,
        "note": "feed:RAWGAS: raw natural gas from field gathering, water-saturated, 1.42 kg/kg sales gas (unallocated)",
        "role": "feedstock"
      },
      {
        "chemical": "water",
        "grade": null,
        "note": "Demineralised make-up water of the amine loop (feed:DMW), 0.64 g per kg sales gas (allocated)",
        "role": "feedstock"
      }
    ],
    "outputs": [
      {
        "chemical": "methane",
        "grade": null,
        "note": "product:SALESGAS, sales gas to the transmission pipeline (7000 kPa(a)), taken as methane like the library's natural-gas consumers; no inventory_key, since the study's energy property is not pure methane's",
        "role": "main-product"
      },
      {
        "chemical": "natural-gas-liquids",
        "grade": null,
        "inventory_key": "product:NGL",
        "note": "C2+ natural gas liquids (ethane-propane mix) to the NGL pipeline",
        "role": "co-product"
      },
      {
        "chemical": "carbon-dioxide",
        "grade": null,
        "inventory_key": "emission:CO2",
        "note": "Reservoir CO2 vented with the amine acid gas (627 kg/h) and combustion CO2 of the fired heaters (278 kg/h); 9.5 g per kg sales gas (allocated)",
        "role": "emission"
      },
      {
        "chemical": "methane",
        "grade": null,
        "inventory_key": "emission:CH4",
        "note": "Methane slip of the amine regenerator and TEG still and unburnt methane of the heaters, 3.05 kg/h; fugitive and non-routine methane not yet estimated",
        "role": "emission"
      }
    ],
    "utilities": [
      {
        "chemical": "electricity",
        "grade": null,
        "inventory_key": "feed:POWER",
        "note": "3.99 MW, of which the residue compressor K-501 3.67 MW (ideal-gas estimate); a possible propane chiller (up to about 1.5 MW, D-016) is not included",
        "role": "utility"
      },
      {
        "chemical": "steam",
        "grade": null,
        "inventory_key": "feed:STEAM",
        "note": "LP steam 450 kPa(a), 1.08 MW, amine reboiler (ASSUMED steam ratio)",
        "role": "utility"
      },
      {
        "chemical": "cooling-water",
        "grade": null,
        "inventory_key": "product:CW",
        "note": "30/40 C (ASSUMED), 6.85 MW",
        "role": "utility"
      }
    ]
  },
  "description": "Raw gas from a shale gathering system (Barnett well 2 composition of Bullin and Krouskop\n2009: 81.2 % CH4, 11.8 % C2H6, 5.2 % C3H8, 0.3 % CO2, 1.5 % N2, no H2S) enters at 6000 kPa(a)\nand 40 degC. Free water is separated; an MDEA unit removes the CO2 to 50 ppmv so that it\ncannot freeze in the cold section and vents the acid gas; a TEG unit dries the gas to the\npipeline water specification and molecular sieve beds polish it for the cryogenic section.\nA gas-subcooled-process type turbo-expander plant recovers 90 % of the ethane and 98 % of\nthe propane as a C2+ NGL; the residue gas is recompressed by the expander-driven booster and\nan electric-motor compressor to 7000 kPa(a). Flash gases and a small residue-gas draw fire\nthe TEG reboiler and the regeneration gas heater. No sulfur recovery: the sourced feed has\nno H2S.\n\nAll values are concept estimates from a specified-split balance (recoveries and removal\ndepths from open sources or ASSUMED); no property package of ChemE-as-Code is yet\nbenchmarked for C2/C3-rich natural gas, aqueous MDEA or TEG, so phase behaviour, the cold-box\nenergy balance and compressor duties are ideal-gas estimates. See DESIGN.md.\n",
  "design_basis": {
    "assumptions": [
      "D-001 boundary: raw gas at the plant inlet to sales gas and C2+ NGL at their pipelines; no field compression, no NGL fractionation, no utility generation, no storage",
      "D-002 no sulfur recovery: the sourced feed reports no H2S",
      "D-006 the balance is a specified-split model (scripts/balance.py); no qualified property package (D-012)",
      "Construction, transport and end of life are outside the preliminary LCI (D-014)"
    ],
    "source": "process/design-basis.yaml"
  },
  "engineering": {
    "description": "Concept design of a 100 MMscf/d natural gas processing plant for a sweet, CO2-bearing rich shale gas: inlet separation, MDEA CO2 removal, TEG and molecular sieve dehydration, turbo-expander NGL recovery, residue gas compression (issue ChemE-as-Code/process-library#181)",
    "name": "Natural gas processing",
    "requires": "cheme-as-code>=0.8",
    "stage": "concept",
    "stages": [
      {
        "id": "concept",
        "title": "Concept and feasibility"
      },
      {
        "id": "basic",
        "title": "Basic engineering"
      },
      {
        "id": "detail",
        "title": "Detail engineering"
      }
    ],
    "tool": "plantcode"
  },
  "facets": {
    "feedstock_basis": [
      "fossil"
    ],
    "product_classes": [
      "fuels"
    ],
    "region": "US",
    "unit_operations": [
      "absorption",
      "adsorption",
      "cryogenic-distillation",
      "compression"
    ]
  },
  "families": [
    "fuels"
  ],
  "gap_count": 7,
  "gates": null,
  "id": "natural-gas-processing-1",
  "issues": {
    "closed_count": 0,
    "list_url": "https://github.com/ChemE-as-Code/process-library/issues?q=is%3Aissue%20label%3A%22process%3Anatural-gas-processing-1%22",
    "new": {
      "action": "https://github.com/ChemE-as-Code/process-library/issues/new?template=1-action-item.yml&labels=process%3Anatural-gas-processing-1&process=natural-gas-processing-1",
      "change": "https://github.com/ChemE-as-Code/process-library/issues/new?template=4-design-change.yml&labels=process%3Anatural-gas-processing-1&process=natural-gas-processing-1",
      "hold": "https://github.com/ChemE-as-Code/process-library/issues/new?template=2-engineering-hold.yml&labels=process%3Anatural-gas-processing-1&process=natural-gas-processing-1",
      "process": "https://github.com/ChemE-as-Code/process-library/issues/new?template=6-process-development.yml&labels=process%3Anatural-gas-processing-1&process=natural-gas-processing-1",
      "tq": "https://github.com/ChemE-as-Code/process-library/issues/new?template=3-technical-query.yml&labels=process%3Anatural-gas-processing-1&process=natural-gas-processing-1",
      "tracker": "https://github.com/ChemE-as-Code/process-library/issues/new?template=7-process-tracker.yml&labels=process%3Anatural-gas-processing-1&process=natural-gas-processing-1"
    },
    "open": [],
    "open_by_gate": {},
    "open_count": 0,
    "private": false,
    "repository": "ChemE-as-Code/process-library"
  },
  "keywords": [
    "natural gas processing",
    "gas plant",
    "sales gas",
    "NGL recovery",
    "turbo-expander",
    "demethaniser",
    "GSP",
    "amine treating",
    "MDEA",
    "CO2 removal",
    "TEG dehydration",
    "molecular sieve",
    "shale gas",
    "Barnett"
  ],
  "lca": {
    "allocation": "energy",
    "backend": "factors",
    "boundary": "gate-to-gate",
    "categories": [
      {
        "id": "climate-change",
        "method": "GWP100",
        "title": "Climate change",
        "unit": "kg CO2-eq"
      }
    ],
    "contributions": [
      {
        "basis": "ipcc2021-gwp100 (124-38-9, air, fossil)",
        "category": "climate-change",
        "impact": 0.00951092,
        "key": "emission:CO2",
        "phase": "operation",
        "share": 0.9075,
        "status": "PUBLISHED"
      },
      {
        "basis": "ipcc2021-gwp100 (74-82-8, air, fossil)",
        "category": "climate-change",
        "impact": 0.000955647,
        "key": "emission:CH4",
        "phase": "operation",
        "share": 0.0912,
        "status": "PUBLISHED"
      },
      {
        "basis": "ipcc2021-gwp100 (10024-97-2, air, fossil)",
        "category": "climate-change",
        "impact": 1.36064e-05,
        "key": "emission:N2O",
        "phase": "operation",
        "share": 0.0013,
        "status": "PUBLISHED"
      }
    ],
    "data_sources": [],
    "factors_status": "published",
    "functional_unit": {
      "amount": 1,
      "chemical": null,
      "grade": null,
      "label": "1 kg SALESGAS",
      "product": "SALESGAS",
      "product_name": null,
      "product_title": "Sales gas to transmission pipeline (7000 kPa(a))",
      "unit": "kg"
    },
    "goal": "Preliminary gate-to-gate life cycle inventory of natural gas processing for the concept stage: the foreground exchanges of the balanced flowsheet (D-006) per kg of sales gas, with the C2+ NGL as co-product, ready to be linked to background datasets (raw gas production, grid electricity, site steam, cooling water). No impact assessment is claimed.",
    "inventory": [
      {
        "direction": "input",
        "key": "feed:RAWGAS",
        "kind": "material",
        "phase": "operation",
        "provenance": "given",
        "quantity": 1.02454,
        "title": "Raw natural gas from field gathering (water-saturated, with free water)",
        "unit": "kg"
      },
      {
        "direction": "input",
        "key": "feed:DMW",
        "kind": "material",
        "phase": "operation",
        "provenance": "given",
        "quantity": 0.000639398,
        "title": "Demineralised make-up water (amine loop)",
        "unit": "kg"
      },
      {
        "direction": "input",
        "key": "feed:AIR",
        "kind": "material",
        "phase": "operation",
        "provenance": "given",
        "quantity": 0.019076,
        "title": "Combustion air (ambient)",
        "unit": "kg"
      },
      {
        "direction": "input",
        "key": "feed:STEAM",
        "kind": "energy",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.0113297,
        "title": "LP steam 450 kPa(a) from the site steam system (amine reboiler)",
        "unit": "kWh"
      },
      {
        "direction": "input",
        "key": "feed:POWER",
        "kind": "energy",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.0418813,
        "title": "Electric power (AC, grid)",
        "unit": "kWh"
      },
      {
        "direction": "output",
        "key": "product:SALESGAS",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 1.0,
        "title": "Sales gas to transmission pipeline (7000 kPa(a))",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "product:NGL",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.396721,
        "title": "Natural gas liquids (C2+, ethane-propane mix) to NGL pipeline",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "product:ACIDGAS",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.0068222,
        "title": "Amine regenerator acid gas (CO2) vented to atmosphere",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "product:STILLVENT",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.00180735,
        "title": "TEG still column vent to atmosphere",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "product:FLUE",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.0202823,
        "title": "Flue gas of the fuel-gas-fired heaters",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "product:PWATER",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.0070983,
        "title": "Produced and separated water to disposal",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "product:CW",
        "kind": "energy",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.0719654,
        "title": "Cooling water return",
        "unit": "kWh"
      },
      {
        "direction": "output",
        "key": "emission:C2H6",
        "kind": "emission",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 8.72114e-06,
        "title": "C2H6 to the environment",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:C3H8",
        "kind": "emission",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 5.6358e-06,
        "title": "C3H8 to the environment",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:CH4",
        "kind": "emission",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 3.20687e-05,
        "title": "CH4 to the environment",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:CO2",
        "kind": "emission",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.00951092,
        "title": "CO2 to the environment",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:H2O",
        "kind": "emission",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.00411865,
        "title": "H2O to the environment",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:N2",
        "kind": "emission",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.0146564,
        "title": "N2 to the environment",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:O2",
        "kind": "emission",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 0.00057955,
        "title": "O2 to the environment",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:NOx",
        "kind": "emission",
        "phase": "operation",
        "provenance": "estimated",
        "quantity": 2.26619e-06,
        "title": "NOx to the environment (estimated)",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:CO",
        "kind": "emission",
        "phase": "operation",
        "provenance": "estimated",
        "quantity": 1.90382e-06,
        "title": "CO to the environment (estimated)",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:N2O",
        "kind": "emission",
        "phase": "operation",
        "provenance": "estimated",
        "quantity": 4.98401e-08,
        "title": "N2O to the environment (estimated)",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:PM",
        "kind": "emission",
        "phase": "operation",
        "provenance": "estimated",
        "quantity": 1.72209e-07,
        "title": "PM to the environment (estimated)",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "emission:NMVOC",
        "kind": "emission",
        "phase": "operation",
        "provenance": "estimated",
        "quantity": 1.24627e-07,
        "title": "NMVOC to the environment (estimated)",
        "unit": "kg"
      },
      {
        "direction": "input",
        "key": "consumable:MDEA",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 1.96988e-05,
        "title": "MDEA make-up (losses by vaporisation, entrainment, degradation)",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "disposal:consumable.MDEA",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 1.96988e-05,
        "title": "Disposal: MDEA make-up (losses by vaporisation, entrainment, degradation) (amine reclaimer residue and degradation products to hazardous waste incineration)",
        "unit": "kg"
      },
      {
        "direction": "input",
        "key": "consumable:TEG",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 1.83856e-05,
        "title": "TEG make-up (vaporisation and carry-over losses)",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "disposal:consumable.TEG",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 1.83856e-05,
        "title": "Disposal: TEG make-up (vaporisation and carry-over losses) (spent glycol and filter residue to incineration)",
        "unit": "kg"
      },
      {
        "direction": "input",
        "key": "consumable:MOLSIEVE",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 1.31326e-05,
        "title": "Molecular sieve adsorbent (zeolite 4A), replaced every 4 years",
        "unit": "kg"
      },
      {
        "direction": "output",
        "key": "disposal:consumable.MOLSIEVE",
        "kind": "material",
        "phase": "operation",
        "provenance": "assumed",
        "quantity": 1.31326e-05,
        "title": "Disposal: Molecular sieve adsorbent (zeolite 4A), replaced every 4 years (spent zeolite to landfill (non-hazardous for sweet gas))",
        "unit": "kg"
      }
    ],
    "no_total": {},
    "not_computed": [],
    "pcf": [],
    "publishable": true,
    "result": {
      "classification": "partial",
      "gaps": 14,
      "label": "partial screening carbon footprint",
      "publication": "public"
    },
    "sources": [
      "lca/README.md",
      "lca/dataset.yaml",
      "lca/factors.yaml",
      "lca/gaps.csv",
      "lca/inventory.csv",
      "lca/lca.yaml",
      "lca/mappings.yaml",
      "lca/results.csv",
      "lca/results.md"
    ],
    "totals": {
      "baseline": {
        "climate-change": 0.01048
      }
    },
    "withheld_reason": null
  },
  "lci_gaps": [
    {
      "dataset": "natural-gas-processing-100-mmscf-d-rich-shale-gas-to-sales-gas-and-c2-ngl",
      "key": "feed:RAWGAS",
      "link": "technosphere",
      "type": "input"
    },
    {
      "dataset": "natural-gas-processing-100-mmscf-d-rich-shale-gas-to-sales-gas-and-c2-ngl",
      "key": "product:PWATER",
      "link": "technosphere",
      "type": "output"
    },
    {
      "dataset": "natural-gas-processing-100-mmscf-d-rich-shale-gas-to-sales-gas-and-c2-ngl",
      "key": "emission:PM",
      "link": "biosphere",
      "type": "emission"
    },
    {
      "dataset": "natural-gas-processing-100-mmscf-d-rich-shale-gas-to-sales-gas-and-c2-ngl",
      "key": "consumable:MDEA",
      "link": "technosphere",
      "type": "input"
    },
    {
      "dataset": "natural-gas-processing-100-mmscf-d-rich-shale-gas-to-sales-gas-and-c2-ngl",
      "key": "disposal:consumable.MDEA",
      "link": "technosphere",
      "type": "output"
    },
    {
      "dataset": "natural-gas-processing-100-mmscf-d-rich-shale-gas-to-sales-gas-and-c2-ngl",
      "key": "consumable:TEG",
      "link": "technosphere",
      "type": "input"
    },
    {
      "dataset": "natural-gas-processing-100-mmscf-d-rich-shale-gas-to-sales-gas-and-c2-ngl",
      "key": "disposal:consumable.TEG",
      "link": "technosphere",
      "type": "output"
    }
  ],
  "maintainers": [
    {
      "name": "Artur Schweidtmann"
    }
  ],
  "maturity": "concept",
  "preliminary": true,
  "provenance": {
    "library_commit": "c3ab3488c602bc797fdc98feffd4578375150dd0",
    "previews": {
      "sheets": [
        "BFD",
        "PFD"
      ],
      "source_commit": "c3ab3488c602bc797fdc98feffd4578375150dd0",
      "tool": "cheme 1.6.0 (pyDEXPI 2.1.0)"
    },
    "previews_stale": false,
    "source_commit": "c3ab3488c602bc797fdc98feffd4578375150dd0"
  },
  "publication": {
    "license": "CC-BY-4.0",
    "status": "public"
  },
  "references": [
    {
      "title": "Bullin, K., Krouskop, P. (2009) Composition variety complicates processing plans for US shale gas. Oil & Gas Journal 107(10); open copy by Bryan Research & Engineering (Table 1, Barnett shale gas composition)",
      "url": "https://www.bre.com/PDF/Composition-Variety-Complicates-Processing-Plans-for-US-Shale-Gas.pdf"
    },
    {
      "title": "US EPA Natural Gas STAR, Lessons Learned: Optimize glycol circulation and install flash tank separators in glycol dehydrators",
      "url": "https://19january2021snapshot.epa.gov/sites/static/files/2016-06/documents/ll_flashtanks3.pdf"
    },
    {
      "title": "US EPA AP-42, Section 1.4 Natural Gas Combustion (Tables 1.4-1 and 1.4-2)",
      "url": "https://www.epa.gov/sites/default/files/2020-09/documents/1.4_natural_gas_combustion.pdf"
    },
    {
      "title": "US EPA AP-42, Section 5.3 Natural Gas Processing (1995)",
      "url": "https://gaftp.epa.gov/ap42/ch05/s03/final/c05s03_1995.pdf"
    },
    {
      "title": "US 11 473 837 B2: Gas subcooled process conversion to recycle split vapor for recovery of ethane and propane (Background: GSP recovery ranges)",
      "url": "https://patents.google.com/patent/US11473837B2/en"
    },
    {
      "doi": "10.1002/14356007.a17_073",
      "title": "Natural Gas. Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH (route identity from issue #181; full text not read)"
    },
    {
      "title": "Wikipedia: Natural-gas processing (pipeline-quality specification; discovery source only)",
      "url": "https://en.wikipedia.org/wiki/Natural-gas_processing"
    }
  ],
  "repository": {
    "access": "public",
    "path": "processes/natural-gas-processing-1",
    "url": "https://github.com/ChemE-as-Code/process-library"
  },
  "representations": [
    {
      "bytes": 42544,
      "id": "BFD",
      "kind": "bfd",
      "preview": "artifacts/natural-gas-processing-1/BFD.svg",
      "source": "process/BFD.xml",
      "status": "preview",
      "title": "Block flow diagram"
    },
    {
      "bytes": 197948,
      "id": "PFD",
      "kind": "pfd",
      "preview": "artifacts/natural-gas-processing-1/PFD.svg",
      "source": "process/PFD.xml",
      "status": "preview",
      "title": "Process flow diagram"
    },
    {
      "id": "process-model",
      "kind": "process-model",
      "source": "process/flowsheet.yaml",
      "status": "viewer",
      "title": "Flowsheet and stream table"
    },
    {
      "id": "equipment-list",
      "kind": "equipment-list",
      "source": "equipment/equipment-list.yaml",
      "status": "viewer",
      "title": "Equipment list"
    },
    {
      "id": "lca",
      "kind": "lca",
      "source": "lca/lca.yaml",
      "status": "viewer",
      "title": "Life cycle assessment"
    }
  ],
  "summary": "A sweet, CO2-bearing rich shale gas (100 MMscf/d) treated to pipeline sales gas and a C2+ NGL: inlet separation, MDEA CO2 removal, TEG and molecular sieve dehydration, turbo-expander NGL recovery and electric residue compression. Concept stage, sourced feed, assumed basis.",
  "title": "Natural gas processing (amine CO2 removal, TEG dehydration, turbo-expander NGL recovery)",
  "validation": {
    "notes": "Concept PFD with closed mass, component and element balances (cheme validate, cheme process streams: every block and step within tolerance; the fired heaters as a reactive step with complete combustion). The streams come from an independent specified-split balance (scripts/balance.py): the feed composition is sourced (Bullin and Krouskop 2009, Table 1), the TEG circulation, gas absorption and flash recovery follow EPA Natural Gas STAR, the ethane/propane recoveries sit inside the range of a GSP patent; removal depths, loadings, efficiencies and the cold separator split are ASSUMED. Energy closure is not evaluable in core: no benchmarked property package covers these mixtures. The preliminary gate-to-gate LCI closes in mass and C/H/N/O (consumables excepted, no composition); every background is a gap; fugitive and non-routine methane is not in the inventory (a screening amount of fugitive methane, 0.1 % of the methane processed, is recorded for the cut-off check and would roughly triple the direct GHG; D-017). The electricity (3.99 MW) is probably under-estimated: an order-of-magnitude cold-box check (D-016) leaves a refrigeration deficit that a propane chiller of up to about 1.5 MW electric (up to +40 %) would cover; no chiller is in the balance. Not reviewed. Main products and feeds are listed under chemistry with their chemicals registry entries (issue #251).",
    "status": "unreviewed"
  },
  "viewer": {
    "commit": "c3ab3488c602bc797fdc98feffd4578375150dd0",
    "dirty": false,
    "sheets": [
      "process/BFD.xml",
      "process/PFD.xml"
    ],
    "skipped": [],
    "snapshot": "snapshots/natural-gas-processing-1/",
    "stale": false,
    "tool": "cheme-as-code 1.6.0",
    "views": [
      "checks",
      "streams"
    ]
  }
}