Catalytic gasification studies in a pressurized fluid-bed unit

Technical Report · Fri Jul 01 04:00:00 EDT 1983

DOI:https://doi.org/10.2172/6015539· OSTI ID:6015539

Mudge, L K; Baker, E G; Mitchell, D H; Robertus, R J; Brown, M D

The purpose of the project is to evaluate the technical and economic feasibility of producing specific gas products via the catalytic gasification of biomass. This report presents the results of research conducted from October 1980 to November 1982. In the laboratory scale studis, active catalysts were developed for generation of synthesis gases from wood by steam gasification. A trimetallic catalyst, Ni-Co-Mo on silica-alumina doped with 2 wt % Na, was found to retain activity indefinitely for generation of a methanol synthesis gas from wood at 1380/sup 0/F (750/sup 0/C) and 1 atm (100 kPa) absolute pressure. Catalysts for generation of a methane-rich gas were deactivated rapidly and could not be regenerated as required for economic application. Sodium carbonate and potassium carbonate were effective as catalysts for conversion of wood to synthesis gases and methane-rich gas and should be economically viable. Catalytic gasification conditions were found to be suitable for processing of alternative feedstocks: bagasse, alfalfa, rice hulls, and almond hulls. The PDU was operated successfully at absolute pressures of up to 10 atm (1000 kPa) and temperatures of up to 1380/sup 0/F (750/sup 0/C). Yields of synthesis gases at elevated pressure were greater than those used for previous economic evaluations. A trimetallic catalyst, Ni-Cu-Mo on silica-alumina, did not display a long life as did the doped trimetallic catalyst used in laboratory studies. A computer program for a Radio Shack TRS-80 Model I microcomputer was developed to evaluate rapidly the economics of producing either methane or methanol from wood. The program is based on economic evaluations reported in previous studies. Improved yields from the PDU studies were found to result in a reduction of about 9 cents/gal in methanol cost.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6015539
• Report Number(s): PNL-4594; ON: DE83016754
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080106 -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
09 BIOMASS FUELS
090122* -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
AGRICULTURAL WASTES
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BENCH-SCALE EXPERIMENTS
BIOMASS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONATES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
COBALT
ECONOMICS
ELEMENTS
ENERGY SOURCES
FEASIBILITY STUDIES
FLUIDIZED BED
FLUIDS
FUNCTIONAL MODELS
GASES
GASIFICATION
HYDROCARBONS
HYDROGEN PRODUCTION
HYDROXY COMPOUNDS
METALS
METHANE
METHANOL
MINERALS
MOLYBDENUM
NICKEL
ORGANIC COMPOUNDS
ORGANIC WASTES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
PROCESS DEVELOPMENT UNITS
PRODUCTION
RENEWABLE ENERGY SOURCES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SODIUM CARBONATES
SODIUM COMPOUNDS
SYNTHESIS GAS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
WASTES
WOOD