This could be fortuitous at modest scales because oxygen is relatively costly (Consonni and Larson 1994a). However, for the production of methanol from biomass, the use of air increases the volume of inert (N 2 ) gas that would have to be carried through all the downstream reactors. Therefore, the use of oxygen thus improves the economics of synthesis gas processing. Air-fired, directly heated gasifiers are considered not to be suitable before methanol production. This gasifier produces a CO 2 rich gas. The CH 4 fraction could be reformed to hydrogen, or be used in a gas turbine. The H 2 :CO ratio () is attractive to produce methanol, although the large CO 2 content lowers the overall. | Alcoholic Fuels Amxte Membrane a fodc Catjlpl CMnlyirt edited by Shelley Minteer Alcoholic Fuels Shelley Minteer Saint Louis University Missouri CRC is an imprint of the Taylor Francis Group an informa business 2006 by Taylor Francis Group LLC Published in 2006 by CRC Press Taylor Francis Group 6000 Broken Sound Parkway NW Suite 300 Boca Raton FL 33487-2742 2006 by Taylor Francis Group LLC CRC Press is an imprint of Taylor Francis Group No claim to original . Government works Printed in the United States of America on acid-free paper 10 987654321 International Standard Book Number-10 0-8493-3944-8 Hardcover International Standard Book Number-13 978-0-8493-3944-8 Hardcover Library of Congress Card Number 2005056058 This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission and sources are indicated. A wide variety of references are listed. Reasonable efforts have been made to publish reliable data and information but the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use. No part of this book may be reprinted reproduced transmitted or utilized in any form by any electronic mechanical or other means now known or hereafter invented including photocopying microfilming and recording or in any information storage or retrieval system without written permission from the publishers. For permission to photocopy or use material electronically from this work please access http or contact the Copyright Clearance Center Inc. CCC 222 Rosewood Drive Danvers MA 01923 978-750-8400. CCC is a not-for-profit organization that provides licenses and registration for a variety of users. For organizations that have been granted a photocopy license by the CCC a separate system of payment has been arranged. Trademark Notice Product or corporate names may be trademarks or registered trademarks and are used only .