Durable regenerable sorbent pellets for removal of hydrogen sulfide coal gas
- Morgantown, WV
Pellets for removing hydrogen sulfide from a coal gasification stream at an elevated temperature are prepared in durable form, usable over repeated cycles of absorption and regeneration. The pellets include a material reactive with hydrogen sulfide, in particular zinc oxide, a binder, and an inert material, in particular calcium sulfate (drierite), having a particle size substantially larger than other components of the pellets. A second inert material and a promoter may also be included. Preparation of the pellets may be carried out by dry, solid-state mixing of components, moistening the mixture, and agglomerating it into pellets, followed by drying and calcining. Pellet size is selected, depending on the type of reaction bed for which the pellets are intended. The use of inert material with a large particle size provides a stable pellet structure with increased porosity, enabling effective gas contact and prolonged mechanical durability.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5866503
- OSTI ID:
- 872127
- Country of Publication:
- United States
- Language:
- English
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Durable regenerable sorbent pellets for removal of hydrogen sulfide from coal gas
Durable regenerable sorbent pellets for removal of hydrogen sulfide from coal gas
Related Subjects
regenerable
sorbent
pellets
removal
hydrogen
sulfide
coal
gas
removing
gasification
stream
elevated
temperature
prepared
form
usable
repeated
cycles
absorption
regeneration
material
reactive
particular
zinc
oxide
binder
inert
calcium
sulfate
drierite
particle
size
substantially
larger
components
promoter
included
preparation
carried
dry
solid-state
mixing
moistening
mixture
agglomerating
followed
drying
calcining
pellet
selected
depending
type
reaction
bed
intended
provides
stable
structure
increased
porosity
enabling
effective
contact
prolonged
mechanical
durability
repeated cycles
substantially larger
sorbent pellets
inert material
zinc oxide
elevated temperature
particle size
coal gasification
hydrogen sulfide
removing hydrogen
coal gas
calcium sulfate
regenerable sorbent
increased porosity
gas contact
gasification stream
durable form
durable regenerable
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