The dry mass flow rate of wood chips into a gasifier is 26.8 kg/hr. The wood chips have a heating value of 18.5 MJ/kg (dry basis). The ultimate analysis (dry basis) is shown to the right. Consider the unbalanced chemical reaction for gasification by partial oxidation: Feed wt% C 46.26 H 5.62 47.66 CnH₂OxSyNz + H2O + 02 → CO2 + CO + H2 + CH4 + N2 + H2S + (Char) S 0.00 N 0.13 Ash 0.33 You are using dry air as the source of oxygen. Total 100.00 Assume the following about the produced syngas: • The N2 in the syngas comes from the gasified biomass & the air. ⚫ The "char" is a solid compound that would account for "excess" amounts of the elements (carbon, hydrogen, etc.) that cannot be accounted for in the mass balance. The gasifier produces 65 Nm³/hr (normal cubic meter per hour based on normal conditions of 1 atm & 25°C). It has the composition shown in the table at the right. Assume other information if required. Determine: The carbon conversion of the gasification. The heating value of the syngas (MJ/Nm³) & the cold gas efficiency. You do not necessarily need to balance the chemical reaction. Syngas [mol%] N2 Balance CO2 8.9 со 22.8 112 20.1 CHA 2./
The dry mass flow rate of wood chips into a gasifier is 26.8 kg/hr. The wood chips have a heating value of 18.5 MJ/kg (dry basis). The ultimate analysis (dry basis) is shown to the right. Consider the unbalanced chemical reaction for gasification by partial oxidation: Feed wt% C 46.26 H 5.62 47.66 CnH₂OxSyNz + H2O + 02 → CO2 + CO + H2 + CH4 + N2 + H2S + (Char) S 0.00 N 0.13 Ash 0.33 You are using dry air as the source of oxygen. Total 100.00 Assume the following about the produced syngas: • The N2 in the syngas comes from the gasified biomass & the air. ⚫ The "char" is a solid compound that would account for "excess" amounts of the elements (carbon, hydrogen, etc.) that cannot be accounted for in the mass balance. The gasifier produces 65 Nm³/hr (normal cubic meter per hour based on normal conditions of 1 atm & 25°C). It has the composition shown in the table at the right. Assume other information if required. Determine: The carbon conversion of the gasification. The heating value of the syngas (MJ/Nm³) & the cold gas efficiency. You do not necessarily need to balance the chemical reaction. Syngas [mol%] N2 Balance CO2 8.9 со 22.8 112 20.1 CHA 2./
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
![The dry mass flow rate of wood chips into a gasifier is 26.8 kg/hr. The wood chips
have a heating value of 18.5 MJ/kg (dry basis). The ultimate analysis (dry basis) is
shown to the right.
Consider the unbalanced chemical reaction for gasification by partial oxidation:
CnH₂OxSyNz + H2O + 02 → CO2 + CO + H2 + CH4 + N2 + H₂S + (Char)
Assume the following about the produced syngas:
You are using dry air as the source of oxygen.
Feed
wt%
C
46.26
H
5.62
О
47.66
S
0.00
N
0.13
Ash
0.33
Tulal
100.00
The N₂ in the syngas comes from the gasified biomass & the air.
The “char” is a solid compound that would account for “excess” amounts of the elements
(carbon, hydrogen, etc.) that cannot be accounted for in the mass balance.
The gasifier produces 65 Nm³/hr (normal cubic meter per hour based on
normal conditions of 1 atm & 25°C). It has the composition shown in the table
at the right.
Assume other information if required.
Determine:
The carbon conversion of the gasification.
The heating value of the syngas (MJ/Nm³) & the cold gas efficiency.
You do not necessarily need to balance the chemical reaction.
Syngas
[mol%]
N2
Balance
CO2
8.9
со
22.8
112
20.1
CH1
2./](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc77f544a-ee3e-4902-8958-66e53c68e4a2%2F05b43ed5-3484-470b-a3ee-b32053e8d3be%2Faefdlch_processed.png&w=3840&q=75)
Transcribed Image Text:The dry mass flow rate of wood chips into a gasifier is 26.8 kg/hr. The wood chips
have a heating value of 18.5 MJ/kg (dry basis). The ultimate analysis (dry basis) is
shown to the right.
Consider the unbalanced chemical reaction for gasification by partial oxidation:
CnH₂OxSyNz + H2O + 02 → CO2 + CO + H2 + CH4 + N2 + H₂S + (Char)
Assume the following about the produced syngas:
You are using dry air as the source of oxygen.
Feed
wt%
C
46.26
H
5.62
О
47.66
S
0.00
N
0.13
Ash
0.33
Tulal
100.00
The N₂ in the syngas comes from the gasified biomass & the air.
The “char” is a solid compound that would account for “excess” amounts of the elements
(carbon, hydrogen, etc.) that cannot be accounted for in the mass balance.
The gasifier produces 65 Nm³/hr (normal cubic meter per hour based on
normal conditions of 1 atm & 25°C). It has the composition shown in the table
at the right.
Assume other information if required.
Determine:
The carbon conversion of the gasification.
The heating value of the syngas (MJ/Nm³) & the cold gas efficiency.
You do not necessarily need to balance the chemical reaction.
Syngas
[mol%]
N2
Balance
CO2
8.9
со
22.8
112
20.1
CH1
2./
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