Biomass Thermochemical Conversion Lecture 25

Flashcards covering key concepts from the lecture on biomass thermochemical conversion processes, including hydrothermal carbonization, pyrolysis, and their applications.

What are the key processes involved in biomass pretreatment?

Hydrothermal carbonization, gasification, pyrolysis.

What happens during hydrothermal carbonization?

Dehydration, decarboxylation, and polymerization of biomass.

What are the three hydrothermal conversion processes?

Hydrothermal carbonization (HTC), hydrothermal liquefaction (HTL), supercritical water gasification (SWG).

What is the main product of hydrothermal liquefaction?

Bio-crude oil.

Why are porous carbon materials significant in various applications?

They serve as catalyst carriers and adsorbents for pollutants.

What is pyrolysis?

The thermal decomposition of materials at elevated temperatures in the absence of oxidants.

What is the effect of temperature on pyrolysis product yields?

Higher temperatures produce more synthesis gas, while lower temperatures favor solid biochar.

What are the three types of pyrolysis?

Fast pyrolysis, slow pyrolysis, and flash pyrolysis.

What type of products does fast pyrolysis primarily produce?

A higher yield of liquid products.

What are the benefits of using hydrochar in soil?

Increases carbon content and improves soil fertility.

What are common applications for hydrochar?

Soil amendment, adsorbent in environmental remediation, fuel source.