Oxidative absorption of hydrogen sulfide by a solution of ferric nitrilotriacetic acid complex in a cocurrent down flow column packed with SMV-4 static mixers

Conference · Thu Dec 01 04:00:00 EST 1994 · Industrial and Engineering Chemistry Research; (United States)

OSTI ID:6628463

Demmink, J F; Wubs, H J; Beenackers, A A.C.M. ^[1]

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1. Univ. of Groningen (Netherlands). Dept. of Chemical Engineering

The reactive absorption of hydrogen sulfide into a solution of the ferric chelate of nitrilotriacetic acid (NTA) was studied at 13 C in a cocurrent down flow column packed with stainless steel Sulzer SMV-4 static mixers. The concentration of ferric chelate varied from 200 to 30 mol/m[sup 3]; the pH ranged from 8.3 to 6.7. Volumetric liquid-phase mass transfer coefficients for H[sub 2]S (k[sub L]a) could be measured and were correlated by k[sub L]a = 0.0572E[sub L][sup 0.55] for 0.060 [<=] U[sub L] [<=] 0.156 [m/s], 0.59 [<=] [<=] U[sub G] [<=] 2.95 [m/s], and 1.4 [times] 10[sup 2] [<=] E[sub L] [<=] 3 [times] 10[sup 3] [N/m[sup 2]s], in which E[sub L] is the liquid energy dissipation factor and U[sub L] and U[sub G] are the superficial liquid and gas velocity, respectively. The k[sub L]a values observed with H[sub 2]S under reactive conditions appeared to be approximately a factor of 4 higher than those observed for oxygen absorption in the same liquid over the same packing. The cause of the extra volumetric mass transfer obtained with H[sub 2]S under similar conditions is not well understood yet. The reaction kinetics of hydrogen sulfide with the ferric chelate of NTA was found to be first order in both ferric NTA and H[sub 2]S for 0.40 < p[sub A] < 0.8 kPa, 0 < C[sub Fe(III)] < 200 mol/m[sup 3], and 6.7 < pH < 8.2.

• OSTI ID: 6628463
• Report Number(s): CONF-940301--
• Conference Information: Journal Name: Industrial and Engineering Chemistry Research; (United States) Journal Volume: 33:12
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
&amp; Peat-- Purification &amp; Upgrading
02 PETROLEUM
020400 -- Petroleum-- Processing
03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
&amp; Processing
ABSORPTION
AMINO ACIDS
CARBOXYLIC ACIDS
CATALYTIC EFFECTS
CHALCOGENIDES
CHELATES
CHELATING AGENTS
COMPLEXES
EXTRACTION APPARATUSES
EXTRACTION COLUMNS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
MASS TRANSFER
NTA
ORGANIC ACIDS
ORGANIC COMPOUNDS
PACKINGS
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS