Creating value from residual biomass (renewable carbon) and waste (recycled carbon) via catalytic routes to fuels is a key strategy leading to a circular economy and reducing the dependency on fossil fuel. This work describes an innovative integrated process to convert renewable and recycled carbon into High Octane Low Carbon Gasoline blends (Figure 1). The process steps are: (i) conversion of mixed feedstock comprising residual biomass and waste via advanced gasification to produce a clean synthesis gas (ii) conversion of the latter into methanol (iii) dehydration of the methanol to DME over an alumina catalyst and (iv) catalytic conversion of DME to High Octane Low Carbon Gasoline (HOLCG) hydrocarbon blends. The HOLCG obtained through this clean technology process is mainly composed of C5-C8 isoparaffinic hydrocarbons rich in triptane. The concentration of isoparaffins is higher than that of conventional gasoline. Moreover, there are neither aromatics nor sulfur in the HOLCG product. The catalyst used for the conversion of DME into HOLCG is a Cu based catalyst HBEA zeolite operating at low temperature (200°C). The HOLCG product obtained can be blended with low octane number gasoline and act as octane enhancer in a similar way as methanol and ethanol but with no Oxygen.

Renewable and recycled carbon for high octane low carbon gasoline (HOLCG) production at pilot scale

255th National Meeting (2018)

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