Experimental Investigation into Fast Pyrolysis of Biomass Using an Entrained-Flow Reactor
Pyrolysis experiments were performed using 30 and 90cm entrained-flow reactors, with steam as a carrier gas and two different feedstocks - wheat straw and powdered material drived from municipal solid waste (ECO-II TM). Reactor wall temperature was varied from 700/sup 0/ to 1400/sup 0/C. Gas composition data from the ECO-II tests were comparable to previously reported data but ethylene yield appeared to vary with reactor wall temperature and residence time. The important conclusion from the wheat straw tests is that olefin yields are about one half that obtained from ECO-II. Evidence was found that high olefin yields from ECO-II are due to the presence of plastics in the feedstock. Batch experiments were run on wheat straw using a Pyroprobe/sup TM/. The samples were heated at a high rate (20,000/sup 0/ C/sec) to 1000/sup 0/ and held at 1000/sup 0/C for a variable period of time from 0.05 to 4.95s. For times up to 0.15s volume fractions of ethylene, propylene, and methane increase while that of carbon dioxide decreases. Subsequently, only carbon monoxide and hydrogen are produced. The change may be related to poor thermal contact and suggests caution in using the Pyroprobe.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 6578570
- Report Number(s):
- SERI/TR-631-1004
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALKENES
SYNTHESIS
METHANE
MUNICIPAL WASTES
PYROLYSIS
PYROLYSIS PRODUCTS
STRAW
BIOMASS
CHEMICAL COMPOSITION
CHEMICAL REACTION YIELD
CHEMICAL REACTORS
ENTRAINMENT
ETHYLENE
EXPERIMENTAL DATA
PROPYLENE
SOLID WASTES
STEAM
VERY HIGH TEMPERATURE
ALKANES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ENERGY SOURCES
HYDROCARBONS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
RENEWABLE ENERGY SOURCES
THERMOCHEMICAL PROCESSES
WASTES
YIELDS
biomass fuels
alkenes
synthesis
methane
municipal wastes
pyrolysis
pyrolysis products
straw
biomass
chemical composition
chemical reaction yield
chemical reactors
entrainment
ethylene
experimental data
propylene
solid wastes
steam
very high temperature
alkanes
chemical reactions
data
decomposition
energy sources
hydrocarbons
140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
090122 - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)