II. How is CBM formed
Coalbed methane (CH4) forms in one of two ways. During the earliest stage of coalification (the process that turns plant detritus into coal), biogenic methane is generated as a by-product of bacterial respiration. Aerobic bacteria (those that use oxygen in respiration) first metabolize any free oxygen left in the plant remains and the surrounding sediments. In fresh water
Coalbed methane is a form of natural gas that is trapped within coal seams.
In recent decades it has become an important source of energy in United States, Canada, and other countries.
It is called sweet gas.
Enhanced coal bed methane recovery
is a method of producing additional coalbed methane from source rock.
This technique may be used in conjunction with carbon capture
and stora
Ⅰ. 서론
고착화 된 고유가 상황과 비전통 천연가스 개발 기술의 발전으로 셰일가스와 더불어 석탄층메탄가스(coalbed methane, CBM) 개발 사업도 많은 주목을 받고 있다. 96% 이상의 에너지 자원을 수입하는 우리나라에게 천연가스는 원유 대체연료로써 그리고 최근의 비전통 천연가스의 경쟁적 개발 상황
GTL 공정의 장점
- 별도의 시설을 구축할 필요 없음
- 가스 운반에 따른 원거리 수송문제 해결
: 수요지로부터 멀리 있는 한계 가스전 활용 가능
유황성분, 방향족, NOx, CO 배출량이 적은 청정 연료
(중략)
Reforming 반응
i. 수증기 개질법
Stream methane reforming
- 촉매 하에 메탄과 스팀의 직접접
What is Bioenergy?
Bioenergy is renewable energy made available from materials derived from biological sources. Biomass is any organic material which has stored sunlight in the form of chemical energy. As a fuel it may include wood, wood waste, straw, manure, sugarcane, and many other byproducts from a variety of agricultural processes.
So, Why do we produce Bioenergy?
One reason governments
Representative Foods which need thorough management control about temperature of all making process and product delivery vehicles
Motive of the research
Safety administration announcement(2009.6.30) -Encourage the period of circulation on the basis of refrigeration circulation on Fruit vegetables beverages below 10°C
Require the research development about non-heating production proce
Various microorganisms(bacteria)
Difficult to maintain the optimum conditions of growth. (Because of difference of growth rate and condition)
Traditional single stage reactor(fermentor)
- Simultaneous Hydrolysis/Acidogenesis & Methanogenesis
- Difficult to operate under optimum conditions
- Very sensitive to change of environment
Analysis microorganism
(More
Definition : technology of capturing CO2 from large point sources and storing it.
Processes of CCS
- Capture
- Compressing and Transport
- Storage
Biomass is any organic material which has stored sunlight in the form of chemical energy.
methanogene은 혐기성 조건에서 생존 가능
Metanogene 은 크게 2종류
Hydrotropic
4H2 +CO2 ->CH4 + 2H2
Acetotrophic
CH3COO- H+-> CH4 + CO2
3. 생물권에서 생산되는 지구의 메탄
1/3은 Hydrotropic 과정 으로생성
2/3 는 “aceticlastic” pathway 에 의해 생성
Factor III, tetrahydromethanopterin (H4MPT), coenz
1. Uptake Hydrogenase
1) Definition of Uptake Hydrogenase and Mechanism of Hydrogen Production
Uptake hydrogenases are Ni-Fe enzymes that catalyze the conversion of hydrogen gas to hydrogen ions and electrons. They are found in the heterocysts and not in the vegetative cells of nitrogen-fixing strains of cyanobacteria. They remove the hydrogen gas produced by nitrogenase when they carry o