Solar coal-gasification reactor for hydrocarbon-free synthesis gas

Conference · Mon Jun 01 04:00:00 EDT 1981

OSTI ID:6376201

Aiman, W R

In many applications, the hydrocarbon content of the synthesis gas produced in coal gasification is very valuable. In SNG production, the end product is a high Btu gas composed of methane and higher hydrocarbons. Furthermore, the liquid hydrocarbons can be even more valuable as feedstocks for other processes. In other applications such as methanol production, the hydrocarbon content of the synthesis gas is a non-reactive diluent that must be bled away from the product synthesis area to keep its concentration from buildng up. The liquid hydrocarbons that are a valuable product in a large-scale plant can cost more to remove from the synthesis gas than they are worth in a small-scale plant. In addition to the above benefits, this reactor requires substantially less steam in the coal gasification process. The reactor is able to produce hydrocarbon-free synthesis gas because it withdraws the pyrolysis gases from the reactor as they are formed and reinjects them above the char gasification zone where they are steam reformed into CO, CO/sub 2/, and H/sub 2/. Since almost all of the hydrocarbons released in coal gasification come off with the pyrolysis gases, the reactor will produce nearly hydrocarbon-free gas.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6376201
• Report Number(s): UCRL-86260; CONF-810469-3; ON: DE81026600
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
14 SOLAR ENERGY
140905
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL GASIFICATION
DECOMPOSITION
DESIGN
ENERGY
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
GASIFICATION
HEAT
MATERIALS
PROCESS HEAT
PYROLYSIS
PYROLYSIS PRODUCTS
REFORMER PROCESSES
SOLAR PROCESS HEAT
STEAM
STEAM REFORMER PROCESSES
SYNTHESIS GAS
THERMOCHEMICAL PROCESSES