10 Conceptual Design of Modern Coal to SNG Project - for Urb

Conceptual Design of Modern Coal to SNGProject - for Urban Users

Reporter: Li Anxue June 20th 2013

ContentsI Research background& goal II Research object specialty& existing problems III Technical measures IV Example V Conclusion

I Research background& goal

I Research background& goal1.1 Coal will remain in dominant position in future Chinese primary energy structure2000-2011 National Energy Consumption& CompositionTotal consumption(10^4t normalized coal)

Proportion in total (%)Coal Oil Gas Hydraulic, nuclear& wind power

Year 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011

Coal rich, oil lean and lack of gas

138553 143199 151797 174990 203227 224682 246270 265583 285000 306647 324939 348002

67.8 66.7 66.3 68.4 68.0 69.1 69.4 69.5 68.7 70.4 68.0 68.4

23.2 22.9 23.4 22.2 22.3 21.0 20.4 19.7 18.7 17.9 19.0 18.6

2.4 2.6 2.6 2.6 2.6 2.8 3.0 3.5 3.8 3.9 4.4 5.0

6.7 7.9 7.7 6.8 7.1 7.1 7.2 7.3 8.9 7.8 8.6 8.0

I Research background& goal1.2 Gas demand continues to increase

Chinese NG consumption is growing fast, showing big shortage and relying on import

As predicted by“Natural Gas‘12-5’ Program”, Chinese gas import dependency may exceed 35% by 2015, bringing new challenge to national energy security. It is therefore necessary to, in addition to optimizing the consumption structure, strive for increasing domestic effective supply.

I Research background& goal1.3 Stricter environment regulations urge seeking for novel coal conversion processesComparison between Pollution from Coal, Oil and Gas CombustionPollutant CO2 CO NOx SO2 Dust Mercury Coal 99631.43 99.63143 218.9017 1241.082 1314.368 0.007664 Oil 78555.55 15.80691 214.5908 537.4349 40.23577 0.003353 Gas 56042.68 19.15989 44.06775 0.478997 3.352981 0 High carbon— low carbon— carbon free

Energy system evolution

Wood CoalCombined energy

Renewable resources

Elevate energy utilizing rate More efficient& cleaner use

I Research background& goal1.4 Types of SNG plantsGas product oriented to

Industrial users (major pipeline, not as main supply)

Regional gas pipe net (as main supply to town gas users

Industrial user oriented SNG plant

Town gas user oriented SNG plant General users combined SNG Plant

I Research background& goal1.5 Problems existing in SNG plant design& construction

1

No commercial SNG plant in China is available for reference

2

Part of SNG projects are blur in orientation

3

Specialty of SNG enterprises is not sufficiently concerned

I Research background& goal1.6 Research goal of the theme

From the viewpoint of supplying chain, individual loop sections in the chain of“coal mine–SNG plant– town gas users” are analyzed, two major contradictions in the supply chain are set forth, and the basic concept and idea for design of town gas users oriented modern SNG plant are proposed. The research achievement will provide reference for the engineering work of planned and/or under cons

truction Chinese SNG projects.

II Research object specialty& existing problems

II Research object specialty& existing problems

Raw coalCoal mine

Gas product

SNG plantShippingPipeline distribution

Gas users

Raw coal

Coal chemical plant

Town users

II Research object specialty& existing problems2.1 Raw coal propertiesLow rank coal species of high moisture and ash content account for more than 50% of coal reserves in China.%.Predicted reserve, Bt Hold-up, Bt

Species

%

%

Distribution East Inner Mongolia, east Heilongjiang, east Yunnan Xinjiang, Shaanxi, Inner Mongolia, Ningxia

Lignite

319.438

5.74

129.132

12.69

White paper“China’s Energy Policy (2012)” proposed“to encourage clean use and conversion of low thermal value coal species”

Low meta soft coal

Long flame Non-caking Weakly caking Gas coal 2853.535 51.23 432.075 42.46

Mid meta soft coal

Fat coal 1599.322 Coke coal Lean coal 28.71 2807.69 27.59 North China

High meta species

796.773

14.31

175.643

17.26

Shanxi, Guizhou, south Sichuan

Rational coal use radius and the property of gas product dictate that SNG is one of the feasible way to convert low rank coal species, in particular lignite for best profitable use.

II Research object specialty& existing problems2.2 Specialties of SNG productGreen, environment friendly, safe and reliable

Higher thermal value

More compressible and easier for long distance shipping

Liquefiable

Impracticable for large quantity storage, higher storage cost

II Research object specialty& existing problems2.3 Town-gas user consumption specialty

Demand on continuous supply

Imbalanced gas use

Town gas users

Season imbalance Daily imbalance

II Research object specialty& existing problems2.4 Coal chemical plant features

Stability of normal operation

“Safety, stability, long-term, full load, and super performance”

Scheduled shut down

Preventive maintenance Catalyst replacement

Risk of unplanned shut down

Internal factors: equipment etc External factors: raw supply etc

II Research object specialty& existing problems2.5 Two major contradictions existing along town user oriented SNG supplying chain

Gas consumption specialty of town-gas users

Contradiction between imbalanced user demand and the requirement of“safe, stable, long-term, full load and super performance” on coal chemical plant Contradiction between users’ continuous demand and scheduled shut down of coal chemical plant

Coal chemical plant features