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Product system model for distributed renewable syngas production

This product system model represents the generation of two co-products from forest or wood product mill operation residues using the Tucker Renewable Natural Gas (RNG) Thermochemical conversion process. The two co-products are a synthesis gas (syngas) and biochar (a form of charcoal made from woody biomass via pyrolysis, used as a soil amendment, and under investigation as an approach to carbon sequestration to produce negative carbon dioxide emissions). As of August 2016, the Tucker RNG process is operational as a pilot scale project in Charlotte, North Carolina. A duplicate Tucker RNG process is designed to take place in St. Regis, Montana along with a chip operation sawmill where the feedstock provided. A wood chip production unit process will be released with a subsequent version of this data set.

The Tucker RNG process uses high-temperature (>750°C) thermochemical conversion in a low oxygen environment to convert feedstock from forest thinning and mill residues into syngas, which can be used for heat and electricity, and co-product biochar for soil amendment or as a precursor in the manufacturing of activated carbon and other industrial carbon products. The system minimizes the introduction of atmosphere using a double air lock coupled with a feedstock compression system that expels interparticulate air from the feedstock before heating. This being an endothermic process, three propane burners are fired to provide heat to the active chamber. The feedstock was transferred into the active section in which the temperature was kept from 750°C to 870°C for pyrolysis reaction. After about 1.5 minutes reaction in the active chamber, the generated biochar and high molecular chained syngas were transferred to a passive section with no external heat source but further reaction with a specific catalyst assistant to produce more low-molecular-chain syngas. Syngas leaving the passive section was then cooled in a tar condenser and a misting chamber to removed oil and tars. The emissions from the Tucker RNG unit conversion were not measured at the test, therefore not accounted for. Only operational data, such as feedstock input, utility use and heat source are measured or calculated to model the process. A more complete description of the Tucker RNG process can be found in Gu and Bergman (2016). See full citation below.

Data for this process were collected in St. Regis, Montana and Locust, NC, where the Tucker RNG conversion process has been tested and demonstrated.

This record was modified on 05/10/2018. The two unit processes previously published were compiled into a product system and the product system model is now available.

Dataset Info

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FieldValue
Authors
Gu, Hongmei
Bergman, Richard
Product Type
Computer model
Spatial / Geographical Coverage Area
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POLYGON ((-80.978661 36.562108, -80.294043 36.545677, -79.510841 36.5402, -75.868676 36.551154, -75.75366 36.151337, -76.032984 36.189676, -76.071322 36.140383, -76.410893 36.080137, -76.460185 36.025367, -76.68474 36.008937, -76.673786 35.937736, -76.399939 35.987029, -76.3616 35.943213, -76.060368 35.992506, -75.961783 35.899398, -75.781044 35.937736, -75.715321 35.696751, -75.775568 35.581735, -75.89606 35.570781, -76.147999 35.324319, -76.482093 35.313365, -76.536862 35.14358, -76.394462 34.973795, -76.279446 34.940933, -76.493047 34.661609, -76.673786 34.694471, -76.991448 34.667086, -77.210526 34.60684, -77.555573 34.415147, -77.82942 34.163208, -77.971821 33.845545, -78.179944 33.916745, -78.541422 33.851022, -79.675149 34.80401, -80.797922 34.820441, -80.781491 34.935456, -80.934845 35.105241, -81.038907 35.044995, -81.044384 35.149057, -82.276696 35.198349, -82.550543 35.160011, -82.764143 35.066903, -83.109191 35.00118, -83.618546 34.984749, -84.319594 34.990226, -84.29221 35.225734, -84.09504 35.247642, -84.018363 35.41195, -83.7719 35.559827, -83.498053 35.565304, -83.251591 35.718659, -82.994175 35.773428, -82.775097 35.997983, -82.638174 36.063706, -82.610789 35.965121, -82.216449 36.156814, -82.03571 36.118475, -81.909741 36.304691, -81.723525 36.353984, -81.679709 36.589492, -80.978661 36.562108))
Spatial / Geographical Coverage Location
St. Regis, Montana; Locust, North Carolina
Temporal Coverage
2013-01-01/2016-12-31
Frequency
Irregularly
Equipment or Software Used
Intended Use
These data were developed as a part of a crop production product system, for use in "Accounting" situations C2 as described in European Commission - Joint Research Centre - Institute for Environment and Sustainablility: International Reference Life Cycle Data System (ILCD) Handbook - General guide for Life Cycle Assessment - Detailed Guidance. The modeled "Syngas; produced from thermochemical conversion; at plant; HHV 17.96MJ/m^3" and "Biochar; produced from thermochemical conversion; at plant; 1.84% moisture" are cradle-to-gate LCA intended for the specific Tucker RNG technology to produce bioenergy/bioproduct from forest or mill residues.
Use Limitations
This unit process was built to specifically represent the Tucker Renewable Natural Gas (RNG) Thermochemical conversion process. Use caution when using this data set as proxy for similar distributed systems or for comparative assertions. The emissions to air for this process were not characterized and are therefore not included in this unit process.
Publisher
USDA LCA Commons
Contact Name
Gu, Hongmei
Contact Email
Public Access Level
Public
Preferred Dataset Citation
Gu, H., Bergman, R., (2016). "Product system model for distributed renewable syngas production." USDA LCA Commons released December 2016.
Primary Article

Gu, H., Bergman, R. (2016). Life Cycle Assessment of a Distributed-Scale Thermochemical Bioenergy Conversion System. Wood and Fiber Science, 48(2), 129-141. https://wfs.swst.org/index.php/wfs/article/view/2415

Cites Other Datasets
License
Reviewer
USDA-ARS-NAL LCA Commons Staff
Funding Source(s)
National Institute of Food and Agriculture
2011-10006-30357
Dataset DOI (digital object identifier)
10.15482/USDA.ADC/1319701
Program Code
005:034 - Department of Agriculture - National Forest System
Bureau Code
005:96 - Forest Service
Modified Date
2018-12-09
Release Date
2016-08-30
Ag Data Commons Keywords: 
  • Bioenergy
State or Territory: 
ISO Topic(s):