Pyrolysis vs Gasification-Thermochemical conversion of biomass

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In summary, pyrolysis and gasification are two methods of breaking down organic material. Pyrolysis uses oxygen from the air to produce exhaust gas, while gasification extracts hydrocarbon and carbon monoxide for later use as fuel. Despite diagrams showing otherwise, gasification does not involve the use of steam.
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shivajikobardan
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Homework Statement
Difference between pyrolysis and gasification
Relevant Equations
none
Pyrolysis-:
1651600046873.png


Gasification-:

1651600069604.png


what's the difference between these two? i have in my notes that gasification uses partial air but pyrolysis uses no air. but in this figure gasification uses steam pipe...whereas pyrolysis uses air pipe. I can't understand what is going on.
 
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shivajikobardan said:
Homework Statement:: Difference between pyrolysis and gasification
Relevant Equations:: none

what's the difference between these two?
Those diagrams are unreliable. That is not a “cyclotron”, it is actually a “cyclone separator”.

Pyrolysis incompletely burns organic material with oxygen from the air, producing CO2 and H2O exhaust gas.
https://en.wikipedia.org/wiki/Pyrolysis

Gassification does not provide oxygen to complete the combustion, but extracts the hydrocarbon and carbon monoxide as “producer gas” for later reaction or use as a fuel.
https://en.wikipedia.org/wiki/Gasification
 
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FAQ: Pyrolysis vs Gasification-Thermochemical conversion of biomass

What is the difference between pyrolysis and gasification?

Pyrolysis and gasification are both thermochemical processes used to convert biomass into energy. The main difference between the two is the presence of oxygen. Pyrolysis occurs in the absence of oxygen, while gasification occurs in the presence of a limited amount of oxygen. This difference in oxygen levels affects the end products and efficiency of the processes.

Which process is more efficient for converting biomass into energy?

The efficiency of pyrolysis and gasification depends on various factors such as the type of biomass, process conditions, and equipment used. Generally, gasification is considered to be more efficient as it can produce a wider range of products, including syngas, heat, and biochar. However, pyrolysis is more efficient in terms of energy production per unit of biomass input.

What are the main products of pyrolysis and gasification?

The main products of pyrolysis are bio-oil, biochar, and syngas. Bio-oil can be used as a liquid fuel, biochar can be used as a soil amendment, and syngas can be used as a fuel for electricity generation. On the other hand, the main products of gasification are syngas, heat, and biochar. The syngas can be used for electricity or heat production, while biochar can be used as a soil amendment.

Which process is more environmentally friendly?

Both pyrolysis and gasification have lower greenhouse gas emissions compared to traditional fossil fuels. However, gasification is considered to be more environmentally friendly as it produces fewer emissions and can also capture and store carbon dioxide. Pyrolysis, on the other hand, can produce bio-oil, which can emit volatile organic compounds (VOCs) and particulate matter.

What are the challenges in implementing pyrolysis and gasification on a large scale?

Some of the main challenges in implementing pyrolysis and gasification on a large scale include high capital costs, technical complexities, and lack of infrastructure. Both processes also require a consistent and reliable supply of biomass, which can be a challenge in some regions. Additionally, there may be regulatory and policy barriers that hinder the widespread adoption of these technologies.

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