Study of corrosion/erosion and fouling mechanisms in syngas cooler by syngas from asphaltene gasification

艾伯塔省拥有世界第三大油砂储量，仅次于沙特阿拉伯和委内瑞拉。油砂产量计划在2020年内从160万桶/天扩大到360万桶/天(1)。这种油砂生产的扩大需要按比例增加氢气生产，以从油砂中提炼沥青。氢气通常是通过天然气的水蒸气重整制得的。另一种获取氢气的方法是煤、焦炭或沥青质的气化。由尼克森运营的Long Lake设施是油砂蒸汽辅助重力排水和升级机与气化的首次大规模集成。改进剂中的沥青质本身价值不大，但用作气化的原料。沥青质的灰分含量低于0.5%，有相当比例的钒和镍化合物以及一些细小的石英和粘土。合成气通过合成气冷却器将显热转移到锅炉给水以产生蒸汽。一些非常细的烟尘和灰尘颗粒随合成气从气化炉中逸出，并在合成气冷却器中造成磨损和腐蚀。

Alberta has 3rd largest oil sands deposit in the world next to Saudi Arabia and Venezuela. The production from oil sands has been planned to expand from 1.6 to 3.6 million barrels/d within 10 years in 2020 (1). Such an expansion in the production of oil sands requires a proportional increase in the hydrogen production for upgrading of bitumen from oil sands. Hydrogen is usually produced from steam reforming of natural gas. An alternative to obtain hydrogen is from gasification of coal pet-coke or asphaltenes. The Long Lake facility, operated by NEXEN, is the first large-scale integration of oil sands Steam Assisted Gravity Drainage and Upgrader with gasification. Asphaltene from the upgrader, of not much value as such, is used as the feedstock for gasification. The asphaltenes have an ash content below 0.5%, with significant proportions of vanadium and nickel compounds along with some fine quartz and clays. The syngas passes through a syngas cooler for the transfer of sensible heat to boiler feed water to produce steam. Some very fine soot and ash particles escape with syngas from the gasifier and cause erosion and corrosion in syngas cooler.