Abstract

The paper lists typical feedstocks supplied by the petroleum industry for the manufacture of town gas and synthesis gas. It discusses the chemical reactions involved in commercial gasification processes and the specifications for feedstocks most suitable for conversion. Since the availability of ideal feeds is limited, it suggests certain relaxations of specifications which will not impair either the technical feasibility or the yield of gasification. In a final section it compares the relative value as gasification feeds of a number of petroleum fractions used in different commercial processes.

Résumé

On décrit les différentes matières premières fournies par l'industrie du pétrole pour la fabrication du gaz de ville et du gaz de synthèse. On discute les réactions chimiques des procédés commerciaux de gazéification et les spécifications exigées des charges destinées à la gazéification. La production des charges possédant les meilleures caractéristiques étant inférieure aux besoins, on suggère certains aménagement des spécifications qui ne compromettraient pas le rendement des procédés de gazéification. Dans la dernière partie de l'exposé, on compare la valeur en tant que charge de fabrication de gaz de diverses coupes pétrolières, pour les diffé- rents procédés de gazéification.

INTRODUCTION

TYPES OF PETROLEUM FEEDSTOCKS While natural gases have been the mainstay of the A considerable range of petroleum feedstocks are gas distribution industry in many parts of the world, suitable for conversion to industrial and fuel gases. there are large industrial and heavily populated areas Amongst those in commercial use are, in addition to which, until recently, have had no or only limited natural gas: access to natural gas. Tn many of these areas in Europe, Japan, South America, South Africa, India and elsewhere, a gaseous fuel for pipeline distribution has been produced over many years from bituminous and similar coals. More recently the high price of coal, combined with the availability of liquid petroleum feedstocks, has resulted in the replacement of coal gas by similar gases made from petroleum.

The paper deals briefly and by way of introduction with the types of feedstocks used by the gas industry in these countries; it correlates feedstock and process types by considering the chemical changes involved in gasification in the more important commercial processes; it deals with the supply of and demand for the various fractions used by the gas industry; it discusses at some length specifications set up by the gas industry and the quality of the products made by the oil industry; it finally analyses the relative value of the different feedstocks to the gas industry in the light of available conversion processes and their efficiency.

Refinery gases Heavy naphtha Light fuel oil LPC propane Wide range naphtha Medium fuel oil LPG butane Kerosine Heavy

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