托普索从煤制天然气.pdf

文档介绍：FROM COAL TO
SUBSTITUTE NATURAL GAS
USING TREMPTM



HALDOR TOPSØE’S

RECYCLE ENERGY-EFFICIENT

METHANATION PROCESS
Introduction

Natural gas is a clean, environmentally friendly energy source, which is expected to form
a greater part of global energy consumption over the next decades. From a global point
of view, natural gas reserves are sufficient to meet this scenario. However, it often has to
be transported over long distances from producing to consuming areas.

Moreover, gas follows the general trend towards higher energy prices – in the US the
price has more than doubled over the last five years, making it economically attractive to
produce natural gas from coal or biomass.

Therefore, synthesis routes to natural gas are gaining interest. The conversion of coal
into Substitute Natural Gas (SNG) takes place in a number of stages:
Steam
Air
WSATMTM
ASASUU WSA Sulphuric Acid
Steam
O
2 CO2/H2S
Coal Syngas
COCO ShShiftift idid GGaass
or Gasifier TREMPTMTM SNG
Converter Removal TREMP
Petcoke Converter Removal
Steam
Steam CO2

Figure 1: Gasification Process – from Coal or Petcoke to SNG.

• Coal gasification by means of oxygen and steam to produce a gas rich in
hydrogen and carbon monoxide.
• Shift reaction to adjust the ratio between hydrogen and carbon monoxide.
• Sour gas re